• Current mirror version of the lowish distortion 1kHz sine wave osillato

    From Bill Sloman@21:1/5 to All on Wed Jan 15 23:33:55 2025
    This just reworks my circuit to use a controllable asymmetric current
    mirror instead of the FET for gain control. I take the feedback from the
    full wave rectifier and switch every half-cycle to reconstruct a
    variable amplitude sine wave to control the output amplitude. It does
    use a lot of components, but it strikes me as fairly comprehensible.

    R30 isn't a real part - it's just there to let me do an FFT on the
    correction signal.

    The circuit just copes with worst case capacitors - 15.15nF and 14.85nF
    - at C5 and C6, as it was intended to do. Using a trim pot to take out component tolerances would let you get away with a smaller correction
    signal injecting smaller doses of the odd harmonics.

    The circuit does cry out for monolithic dual transisors.The On-Semi NST45010MW6T1G pnp and the
    NST45011MW6T1G npn parts are cheap and widely available.

    Version 4
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    SYMATTR InstName L6
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth
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    SYMBOL cap 320 -1968 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C20
    SYMATTR Value 100n
    SYMBOL cap -96 -816 R0
    WINDOW 0 -60 15 Left 2
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    SYMATTR InstName C22
    SYMATTR Value 100n
    SYMBOL References\\LTC6655-1.25 2560 -1120 R0
    SYMATTR InstName U4
    SYMBOL cap -64 -1824 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C9
    SYMATTR Value 10p
    SYMBOL FerriteBead 576 -1936 R0
    SYMATTR InstName L13
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth
    Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 704 -1088 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C13
    SYMATTR Value 10p
    SYMBOL res 2592 -1792 R90
    WINDOW 0 0 56 VBottom 2
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    SYMATTR Value 137k
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    WINDOW 0 0 56 VBottom 2
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    SYMATTR InstName R8
    SYMATTR Value 14k
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    SYMATTR Value 56k
    SYMBOL cap 1312 -1392 R0
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    SYMATTR Value 18n
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    SYMATTR Value 18n
    SYMBOL res 1216 -1568 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R14
    SYMATTR Value 14k
    SYMBOL Opamps\\LT1013 1392 -1632 R0
    SYMATTR InstName U6
    SYMBOL res 896 -1536 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R15
    SYMATTR Value 18.7k
    SYMBOL res 2048 -1840 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R16
    SYMATTR Value 14k
    SYMBOL cap 1728 -1872 R0
    SYMATTR InstName C14
    SYMATTR Value 18n
    SYMBOL res 1888 -1584 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R17
    SYMATTR Value 14k
    SYMBOL Opamps\\LT1013 2064 -1648 R0
    SYMATTR InstName U7
    SYMBOL res 1568 -1552 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R18
    SYMATTR Value 18.7k
    SYMBOL res 1888 -1408 R0
    SYMATTR InstName R19
    SYMATTR Value 56k
    SYMBOL cap 1984 -1344 R0
    SYMATTR InstName C24
    SYMATTR Value 18n
    SYMBOL npn -1504 -1008 R0
    SYMATTR InstName Q1
    SYMATTR Value 2N5089
    SYMBOL npn -1712 -1008 M0
    SYMATTR InstName Q2
    SYMATTR Value 2N5089
    SYMBOL res 2384 -1792 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R9
    SYMATTR Value 17k
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    SYMATTR InstName R28
    SYMATTR Value 68k
    SYMBOL Opamps\\LT1115 -656 -1504 R0
    SYMATTR InstName U3
    SYMBOL Opamps\\LT1115 -176 -1584 R0
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    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C2
    SYMATTR Value 3.3p
    SYMBOL res -1792 -848 R0
    SYMATTR InstName R7
    SYMATTR Value 68
    SYMBOL pnp -1840 -1632 M180
    WINDOW 3 84 0 Left 2
    SYMATTR Value 2N5087
    SYMATTR InstName Q3
    SYMBOL res -1792 -1984 R0
    SYMATTR InstName R11
    SYMATTR Value 270k
    SYMBOL res -1632 -1920 R0
    SYMATTR InstName R21
    SYMATTR Value 47k
    SYMBOL npn -1584 -1424 R0
    SYMATTR InstName Q5
    SYMATTR Value 2N5089
    SYMBOL npn -1296 -1424 M0
    WINDOW 3 -40 125 Left 2
    SYMATTR Value 2N5089
    SYMATTR InstName Q6
    SYMBOL pnp -1296 -1824 R180
    WINDOW 3 84 0 Left 2
    SYMATTR Value 2N5087
    SYMATTR InstName Q7
    SYMBOL pnp -1264 -1824 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q8
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    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
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    SYMATTR Value 10k
    SYMATTR SpiceLine tol=1
    SYMBOL schottky -1680 -1488 R0
    WINDOW 3 -78 72 Left 2
    WINDOW 0 -81 40 Left 2
    SYMATTR Value BAS70L
    SYMATTR InstName D3
    SYMBOL schottky -1632 -1264 R180
    WINDOW 3 24 0 Left 2
    WINDOW 0 24 64 Left 2
    SYMATTR Value BAS70L
    SYMATTR InstName D4
    SYMBOL res -1376 -2176 R0
    SYMATTR InstName R6
    SYMATTR Value 3k
    SYMBOL res -1216 -2128 R0
    SYMATTR InstName R24
    SYMATTR Value 3k
    SYMBOL pnp -1264 -1680 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q9
    SYMATTR Value 2N5087
    SYMBOL npn -1504 -1200 R0
    SYMATTR InstName Q10
    SYMATTR Value 2N5089
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    SYMATTR InstName R27
    SYMATTR Value 9.1
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    SYMATTR InstName U9
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    SYMATTR Value 100
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    SYMATTR Value 10k
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    SYMATTR Value 10k
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    WINDOW 0 0 56 VBottom 2
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    SYMATTR InstName R30
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    TEXT -2232 -1200 Left 2 !.MODEL BAS70L D \n+ IS = 3.22E-9 \n+ N = 1.018
    \n+ BV = 77 \n+ IBV = 1.67E-7 \n+ RS = 20.89 \n+ CJO = 1.608E-12 \n+ VJ
    = 0.3891 \n+ M = 0.3683 \n+ FC = 0.5 \n+ EG = 0.69 \n+ XTI = 2 \n.ENDS
    TEXT -336 -528 Left 2 ;R2 a,b,c, Vishay Beschlag ACAS06S0830372P1AT
    precision 10k resistor array \n R1a, R1b Maxim MAX5492LB10000+T 10K
    resistive divider in a SOT-23-5 package
    TEXT -720 -464 Left 2 !.MODEL MMBF4391 NJF VTO=-4.6 BETA=0.02779
    LAMBDA=0.00595 RD=1 RS=1 IS=1e-14 CGD=14p CGS=10.5p PB=1 B=1 KF=1e-18
    AF=1 FC=0.5 mfg=Motorola
    TEXT -1112 -464 Left 2 !.tran 0 10s 0s startup

    --
    Bill Sloman, Sydney

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Bill Sloman on Wed Jan 15 13:16:51 2025
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vm89vp$2ulja$1@dont-email.me...
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.


    First I corrected the usual line wrap issues.

    In the latest LTSpice (24.1.0) it took me a good hour or two to find out why I was getting strange netlist errors for all the opamps
    in the circuit.

    This turned out to be .ENDS in the BAS70L model. Remove .ENDS and the issues go away.

    So this is the circuit I'm simulating in 24.1.0 with no component updates available.
    I'm expecting it to take 2 hours to complete.

    Version 4.1
    SHEET 1 3608 920
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    SYMBOL res 48 -1344 R0
    WINDOW 0 41 37 Left 2
    WINDOW 3 36 71 Left 2
    SYMATTR InstName R1
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res -64 -1152 R0
    WINDOW 3 41 74 Left 2
    WINDOW 0 43 31 Left 2
    SYMATTR Value 4k02
    SYMATTR InstName R2
    SYMATTR SpiceLine tol=1
    SYMBOL cap -160 -1136 R0
    SYMATTR InstName C1
    SYMATTR Value 3.3n
    SYMBOL schottky 352 -1312 R0
    WINDOW 3 -89 62 Left 2
    WINDOW 0 -92 37 Left 2
    SYMATTR Value BAS70L
    SYMATTR InstName D1
    SYMBOL schottky 352 -1088 R0
    WINDOW 3 -78 61 Left 2
    WINDOW 0 -81 40 Left 2
    SYMATTR Value BAS70L
    SYMATTR InstName D2
    SYMBOL res 352 -1472 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R1a
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res 208 -1536 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R3
    SYMATTR Value 20k
    SYMATTR SpiceLine tol=1
    SYMBOL res 480 -1408 R0
    WINDOW 0 41 41 Left 2
    WINDOW 3 34 79 Left 2
    SYMATTR InstName R2a
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res 560 -928 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R2b
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res 720 -928 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R2c
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL cap 160 -960 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C4
    SYMATTR Value 3.3p
    SYMBOL res 48 -896 R0
    WINDOW 0 39 33 Left 2
    WINDOW 3 40 74 Left 2
    SYMATTR InstName R1b
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL voltage -1104 -1120 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    SYMATTR InstName V1
    SYMATTR Value 12
    SYMBOL voltage -1104 -976 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    SYMATTR InstName V2
    SYMATTR Value 12
    SYMBOL cap -448 -1600 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C5
    SYMATTR Value 15n
    SYMATTR SpiceLine V=63 Rser=4 Lser=12n
    SYMBOL res -448 -1568 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R4
    SYMATTR Value 10.7k
    SYMATTR SpiceLine tol=1
    SYMBOL cap -64 -1728 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C6
    SYMATTR Value 15n
    SYMATTR SpiceLine V=63 Rser=4 Lser=12n
    SYMBOL cap 3104 -1664 R180
    WINDOW 0 24 64 Left 2
    WINDOW 3 24 8 Left 2
    SYMATTR InstName C8
    SYMATTR Value 100n
    SYMBOL res 2848 -1760 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R10
    SYMATTR Value 82k
    SYMBOL cap 2784 -1120 R0
    SYMATTR InstName C10
    SYMATTR Value 3.3u
    SYMBOL cap 2912 -1552 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C11
    SYMATTR Value 3.3p
    SYMBOL FerriteBead 576 -672 R0
    SYMATTR InstName L2
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 752 -1408 R0
    SYMATTR InstName C15
    SYMATTR Value 100n
    SYMBOL cap 752 -800 R0
    SYMATTR InstName C16
    SYMATTR Value 100n
    SYMBOL FerriteBead -176 -928 R0
    SYMATTR InstName L4
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap -336 -2000 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C17
    SYMATTR Value 100n
    SYMBOL cap -336 -1168 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C18
    SYMATTR Value 100n
    SYMBOL cap 2272 -1184 R0
    SYMATTR InstName C21
    SYMATTR Value 100n
    SYMBOL FerriteBead 2288 -1408 R0
    SYMATTR InstName L7
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL res -480 -1888 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R22
    SYMATTR Value 2.49k
    SYMATTR SpiceLine tol=1
    SYMBOL FerriteBead -320 -2336 R0
    SYMATTR InstName L8
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap -752 -1984 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C7
    SYMATTR Value 100n
    SYMBOL FerriteBead -736 -2352 R0
    SYMATTR InstName L3
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL FerriteBead -656 -896 R0
    SYMATTR InstName L9
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap -864 -1152 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C23
    SYMATTR Value 100n
    SYMBOL res -160 -1600 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R26
    SYMATTR Value 10.7k
    SYMATTR SpiceLine tol=1
    SYMBOL res -768 -1808 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R5
    SYMATTR Value 4.99k
    SYMATTR SpiceLine tol=1
    SYMBOL cap -784 -1648 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C19
    SYMATTR Value 10p
    SYMBOL FerriteBead 208 -672 R0
    SYMATTR InstName L5
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL FerriteBead 208 -2352 R0
    SYMATTR InstName L6
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 320 -1968 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C20
    SYMATTR Value 100n
    SYMBOL cap -96 -816 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C22
    SYMATTR Value 100n
    SYMBOL cap -64 -1824 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C9
    SYMATTR Value 10p
    SYMBOL FerriteBead 576 -1936 R0
    SYMATTR InstName L13
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 704 -1088 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C13
    SYMATTR Value 10p
    SYMBOL res 2592 -1792 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R12
    SYMATTR Value 137k
    SYMBOL res 1376 -1776 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R8
    SYMATTR Value 14k
    SYMBOL res 1216 -1456 R0
    SYMATTR InstName R13
    SYMATTR Value 56k
    SYMBOL cap 1312 -1392 R0
    SYMATTR InstName C3
    SYMATTR Value 18n
    SYMBOL cap 1056 -1856 R0
    SYMATTR InstName C12
    SYMATTR Value 18n
    SYMBOL res 1216 -1568 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R14
    SYMATTR Value 14k
    SYMBOL res 896 -1536 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R15
    SYMATTR Value 18.7k
    SYMBOL res 2048 -1840 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R16
    SYMATTR Value 14k
    SYMBOL cap 1728 -1872 R0
    SYMATTR InstName C14
    SYMATTR Value 18n
    SYMBOL res 1888 -1584 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R17
    SYMATTR Value 14k
    SYMBOL res 1568 -1552 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R18
    SYMATTR Value 18.7k
    SYMBOL res 1888 -1408 R0
    SYMATTR InstName R19
    SYMATTR Value 56k
    SYMBOL cap 1984 -1344 R0
    SYMATTR InstName C24
    SYMATTR Value 18n
    SYMBOL npn -1504 -1008 R0
    SYMATTR InstName Q1
    SYMATTR Value 2N5089
    SYMBOL npn -1712 -1008 M0
    SYMATTR InstName Q2
    SYMATTR Value 2N5089
    SYMBOL res 2384 -1792 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R9
    SYMATTR Value 17k
    SYMBOL res 2416 -1728 R0
    SYMATTR InstName R28
    SYMATTR Value 68k
    SYMBOL cap 320 -1376 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C2
    SYMATTR Value 3.3p
    SYMBOL res -1792 -848 R0
    SYMATTR InstName R7
    SYMATTR Value 68
    SYMBOL pnp -1840 -1632 M180
    WINDOW 3 84 0 Left 2
    SYMATTR Value 2N5087
    SYMATTR InstName Q3
    SYMBOL res -1792 -1984 R0
    SYMATTR InstName R11
    SYMATTR Value 270k
    SYMBOL res -1632 -1920 R0
    SYMATTR InstName R21
    SYMATTR Value 47k
    SYMBOL npn -1584 -1424 R0
    SYMATTR InstName Q5
    SYMATTR Value 2N5089
    SYMBOL npn -1296 -1424 M0
    WINDOW 3 -40 125 Left 2
    SYMATTR Value 2N5089
    SYMATTR InstName Q6
    SYMBOL pnp -1296 -1824 R180
    WINDOW 3 84 0 Left 2
    SYMATTR Value 2N5087
    SYMATTR InstName Q7
    SYMBOL pnp -1264 -1824 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q8
    SYMATTR Value 2N5087
    SYMBOL res -1056 -1360 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R23
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=1
    SYMBOL schottky -1680 -1488 R0
    WINDOW 3 -78 72 Left 2
    WINDOW 0 -81 40 Left 2
    SYMATTR Value BAS70L
    SYMATTR InstName D3
    SYMBOL schottky -1632 -1264 R180
    WINDOW 3 24 0 Left 2
    WINDOW 0 24 64 Left 2
    SYMATTR Value BAS70L
    SYMATTR InstName D4
    SYMBOL res -1376 -2176 R0
    SYMATTR InstName R6
    SYMATTR Value 3k
    SYMBOL res -1216 -2128 R0
    SYMATTR InstName R24
    SYMATTR Value 3k
    SYMBOL pnp -1264 -1680 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q9
    SYMATTR Value 2N5087
    SYMBOL npn -1504 -1200 R0
    SYMATTR InstName Q10
    SYMATTR Value 2N5089
    SYMBOL res -1376 -2064 R0
    SYMATTR InstName R27
    SYMATTR Value 9.1
    SYMBOL res -560 -1744 R0
    SYMATTR InstName R20
    SYMATTR Value 100
    SYMBOL res 3136 -1328 R0
    SYMATTR InstName R25
    SYMATTR Value 10k
    SYMBOL res 3136 -944 R0
    SYMATTR InstName R29
    SYMATTR Value 10k
    SYMBOL res -976 -1632 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R30
    SYMATTR Value 10
    SYMATTR SpiceLine tol=1
    SYMBOL OpAmps\\LT1360 208 -1184 R0
    SYMATTR InstName U1
    SYMBOL OpAmps\\LT1115 -656 -1504 R0
    SYMATTR InstName U3
    SYMBOL OpAmps\\LT1115 -176 -1584 R0
    SYMATTR InstName U8
    SYMBOL OpAmps\\OP27 576 -1264 R0
    SYMATTR InstName U2
    SYMBOL OpAmps\\LT1056A 2992 -1456 R0
    SYMATTR InstName U5
    SYMBOL OpAmps\\LT1056A 3264 -1088 R0
    SYMATTR InstName U10
    SYMBOL References\\LTC6655-1.25 2560 -1120 R0
    SYMATTR InstName U4
    SYMBOL OpAmps\\LT1013 -1984 -1744 R0
    SYMATTR InstName U9
    SYMBOL OpAmps\\LT1013 1392 -1632 R0
    SYMATTR InstName U6
    SYMBOL OpAmps\\LT1013 2064 -1648 R0
    SYMATTR InstName U7
    TEXT -2232 -1200 Left 2 !.MODEL BAS70L D \n+ IS = 3.22E-9 \n+ N = 1.018 \n+ BV = 77 \n+ IBV = 1.67E-7 \n+ RS = 20.89 \n+ CJO =
    1.608E-12 \n+ VJ = 0.3891 \n+ M = 0.3683 \n+ FC = 0.5 \n+ EG = 0.69 \n+ XTI = 2 TEXT -336 -528 Left 2 ;R2 a,b,c, Vishay Beschlag ACAS06S0830372P1AT precision 10k resistor array \n R1a, R1b Maxim
    MAX5492LB10000+T 10K resistive divider in a SOT-23-5 package
    TEXT -720 -464 Left 2 !.MODEL MMBF4391 NJF VTO=-4.6 BETA=0.02779 LAMBDA=0.00595 RD=1 RS=1 IS=1e-14 CGD=14p CGS=10.5p PB=1 B=1
    KF=1e-18 AF=1 FC=0.5 mfg=Motorola
    TEXT -1112 -464 Left 2 !.tran 0 10s 0s startup

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Edward Rawde on Wed Jan 15 14:47:39 2025
    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vm8u2l$pns$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vm89vp$2ulja$1@dont-email.me...
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.


    First I corrected the usual line wrap issues.

    In the latest LTSpice (24.1.0) it took me a good hour or two to find out why I was getting strange netlist errors for all the
    opamps in the circuit.

    This turned out to be .ENDS in the BAS70L model. Remove .ENDS and the issues go away.

    So this is the circuit I'm simulating in 24.1.0 with no component updates available.
    I'm expecting it to take 2 hours to complete.

    Actually I was wrong about the simulation time.
    For 10 seconds the simulation time will be between 5 and 7 days.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Don@21:1/5 to Edward Rawde on Wed Jan 15 19:47:47 2025
    Edward Rawde wrote:
    Bill Sloman wrote:
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.


    First I corrected the usual line wrap issues.

    In the latest LTSpice (24.1.0) it took me a good hour or two to find out why I was getting strange netlist errors for all the opamps
    in the circuit.

    This turned out to be .ENDS in the BAS70L model. Remove .ENDS and the issues go away.

    So this is the circuit I'm simulating in 24.1.0 with no component updates available.
    I'm expecting it to take 2 hours to complete.

    Thank you for your tip to wait 2 hours for results. For what it's worth,
    Bill's original LTSpice source worked for me "as is."

    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light;
    She set out one day In a relative way And returned on the previous night.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Don on Wed Jan 15 15:23:33 2025
    "Don" <g@crcomp.net> wrote in message news:20250115a@crcomp.net...
    Edward Rawde wrote:
    Bill Sloman wrote:
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.


    First I corrected the usual line wrap issues.

    In the latest LTSpice (24.1.0) it took me a good hour or two to find out why I was getting strange netlist errors for all the
    opamps
    in the circuit.

    This turned out to be .ENDS in the BAS70L model. Remove .ENDS and the issues go away.

    So this is the circuit I'm simulating in 24.1.0 with no component updates available.
    I'm expecting it to take 2 hours to complete.

    Thank you for your tip to wait 2 hours for results. For what it's worth, Bill's original LTSpice source worked for me "as is."

    It did for me too, but because it looked like simulation time would be long I moved it to another machine I use over remote desktop.
    On that machine LTSpice asked if I'd like the latest version so I upgraded to 24.1.0.
    After the upgrade I got very strange netlist errors which didn't mention BAS70L and it took a while to figure out the cause.

    I'm now revising the simulation time to a minimum of 4 days for 10 seconds. 24.1.0 seems to be faster.


    Danke,

    --
    Don, KB7RPU, https://www.qsl.net/kb7rpu
    There was a young lady named Bright Whose speed was far faster than light; She set out one day In a relative way And returned on the previous night.


    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Edward Rawde on Wed Jan 15 17:19:07 2025
    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vm93ct$vf9$1@nnrp.usenet.blueworldhosting.com...
    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vm8u2l$pns$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vm89vp$2ulja$1@dont-email.me...
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.


    First I corrected the usual line wrap issues.

    In the latest LTSpice (24.1.0) it took me a good hour or two to find out why I was getting strange netlist errors for all the
    opamps in the circuit.

    This turned out to be .ENDS in the BAS70L model. Remove .ENDS and the issues go away.

    So this is the circuit I'm simulating in 24.1.0 with no component updates available.
    I'm expecting it to take 2 hours to complete.

    Actually I was wrong about the simulation time.
    For 10 seconds the simulation time will be between 5 and 7 days.


    There was a mistake in the corrected circuit I posted which was caused by me investigating why it wouldn't simulate at all in 24.1.0
    U6 and U7 power was disconnected.
    But it still looks like 4 days for 10 seconds.
    The circuit below should be what Bill intended.

    Version 4.1
    SHEET 1 3608 920
    WIRE -1360 -2400 -1984 -2400
    WIRE -1200 -2400 -1360 -2400
    WIRE -1104 -2400 -1200 -2400
    WIRE -736 -2400 -1104 -2400
    WIRE -320 -2400 -736 -2400
    WIRE 208 -2400 -320 -2400
    WIRE 336 -2400 208 -2400
    WIRE 576 -2400 336 -2400
    WIRE -736 -2384 -736 -2400
    WIRE 208 -2384 208 -2400
    WIRE -320 -2368 -320 -2400
    WIRE 3376 -2272 -1616 -2272
    WIRE 880 -2192 -1776 -2192
    WIRE -1360 -2160 -1360 -2400
    WIRE -736 -2160 -736 -2320
    WIRE -656 -2160 -736 -2160
    WIRE -320 -2160 -320 -2304
    WIRE -176 -2160 -320 -2160
    WIRE 208 -2144 208 -2320
    WIRE 336 -2144 208 -2144
    WIRE -1200 -2112 -1200 -2400
    WIRE -1360 -2048 -1360 -2080
    WIRE -320 -2000 -320 -2160
    WIRE -736 -1984 -736 -2160
    WIRE -1776 -1968 -1776 -2192
    WIRE 336 -1968 336 -2144
    WIRE 576 -1968 576 -2400
    WIRE -1360 -1920 -1360 -1968
    WIRE -1200 -1920 -1200 -2032
    WIRE 1952 -1920 1744 -1920
    WIRE 2160 -1920 1952 -1920
    WIRE -1616 -1904 -1616 -2272
    WIRE 1376 -1904 1072 -1904
    WIRE 1536 -1904 1376 -1904
    WIRE 336 -1888 336 -1904
    WIRE -1280 -1872 -1296 -1872
    WIRE -1264 -1872 -1280 -1872
    WIRE -576 -1872 -912 -1872
    WIRE -32 -1872 -496 -1872
    WIRE 1744 -1872 1744 -1920
    WIRE 1072 -1856 1072 -1904
    WIRE 1952 -1824 1904 -1824
    WIRE 2160 -1824 2160 -1920
    WIRE 2160 -1824 2032 -1824
    WIRE -128 -1808 -272 -1808
    WIRE -32 -1808 -32 -1872
    WIRE -32 -1808 -64 -1808
    WIRE -1776 -1792 -1776 -1888
    WIRE -1776 -1792 -2064 -1792
    WIRE -1280 -1792 -1280 -1872
    WIRE -1200 -1792 -1200 -1824
    WIRE -1200 -1792 -1280 -1792
    WIRE -912 -1792 -912 -1872
    WIRE -864 -1792 -912 -1792
    WIRE -544 -1792 -784 -1792
    WIRE -1200 -1776 -1200 -1792
    WIRE 576 -1776 576 -1904
    WIRE 768 -1776 576 -1776
    WIRE 2160 -1776 2160 -1824
    WIRE 2288 -1776 2160 -1776
    WIRE 2432 -1776 2368 -1776
    WIRE 2496 -1776 2432 -1776
    WIRE 2800 -1776 2576 -1776
    WIRE 2864 -1776 2800 -1776
    WIRE 3088 -1776 2944 -1776
    WIRE 1280 -1760 1232 -1760
    WIRE 1536 -1760 1536 -1904
    WIRE 1536 -1760 1360 -1760
    WIRE -1776 -1728 -1776 -1792
    WIRE -1360 -1728 -1360 -1824
    WIRE -1360 -1728 -1520 -1728
    WIRE -1264 -1728 -1360 -1728
    WIRE -544 -1728 -544 -1792
    WIRE 3088 -1728 3088 -1776
    WIRE -1984 -1712 -1984 -2400
    WIRE -272 -1712 -272 -1808
    WIRE -128 -1712 -272 -1712
    WIRE -32 -1712 -32 -1808
    WIRE -32 -1712 -64 -1712
    WIRE 2432 -1712 2432 -1776
    WIRE -2064 -1696 -2064 -1792
    WIRE -2016 -1696 -2064 -1696
    WIRE -1840 -1680 -1952 -1680
    WIRE -2016 -1664 -2064 -1664
    WIRE 1632 -1648 1392 -1648
    WIRE 2064 -1648 1632 -1648
    WIRE -912 -1632 -912 -1792
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    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q9
    SYMATTR Value 2N5087
    SYMBOL npn -1504 -1200 R0
    SYMATTR InstName Q10
    SYMATTR Value 2N5089
    SYMBOL res -1376 -2064 R0
    SYMATTR InstName R27
    SYMATTR Value 9.1
    SYMBOL res -560 -1744 R0
    SYMATTR InstName R20
    SYMATTR Value 100
    SYMBOL res 3136 -1328 R0
    SYMATTR InstName R25
    SYMATTR Value 10k
    SYMBOL res 3136 -944 R0
    SYMATTR InstName R29
    SYMATTR Value 10k
    SYMBOL res -976 -1632 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R30
    SYMATTR Value 10
    SYMATTR SpiceLine tol=1
    SYMBOL OpAmps\\LT1360 208 -1184 R0
    SYMATTR InstName U1
    SYMBOL OpAmps\\LT1115 -656 -1504 R0
    SYMATTR InstName U3
    SYMBOL OpAmps\\LT1115 -176 -1584 R0
    SYMATTR InstName U8
    SYMBOL OpAmps\\OP27 576 -1264 R0
    SYMATTR InstName U2
    SYMBOL OpAmps\\LT1056A 2992 -1456 R0
    SYMATTR InstName U5
    SYMBOL OpAmps\\LT1056A 3264 -1088 R0
    SYMATTR InstName U10
    SYMBOL References\\LTC6655-1.25 2560 -1120 R0
    SYMATTR InstName U4
    SYMBOL OpAmps\\LT1013 -1984 -1744 R0
    SYMATTR InstName U9
    SYMBOL OpAmps\\LT1013 1392 -1632 R0
    SYMATTR InstName U6
    SYMBOL OpAmps\\LT1013 2064 -1648 R0
    SYMATTR InstName U7
    TEXT -2232 -1200 Left 2 !.MODEL BAS70L D \n+ IS = 3.22E-9 \n+ N = 1.018 \n+ BV = 77 \n+ IBV = 1.67E-7 \n+ RS = 20.89 \n+ CJO =
    1.608E-12 \n+ VJ = 0.3891 \n+ M = 0.3683 \n+ FC = 0.5 \n+ EG = 0.69 \n+ XTI = 2 TEXT -336 -528 Left 2 ;R2 a,b,c, Vishay Beschlag ACAS06S0830372P1AT precision 10k resistor array \n R1a, R1b Maxim
    MAX5492LB10000+T 10K resistive divider in a SOT-23-5 package
    TEXT -720 -464 Left 2 !.MODEL MMBF4391 NJF VTO=-4.6 BETA=0.02779 LAMBDA=0.00595 RD=1 RS=1 IS=1e-14 CGD=14p CGS=10.5p PB=1 B=1
    KF=1e-18 AF=1 FC=0.5 mfg=Motorola
    TEXT -1112 -464 Left 2 !.tran 0 10s 0s startup

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Bill Sloman@21:1/5 to Edward Rawde on Thu Jan 16 14:17:24 2025
    On 16/01/2025 7:23 am, Edward Rawde wrote:
    "Don" <g@crcomp.net> wrote in message news:20250115a@crcomp.net...
    Edward Rawde wrote:
    Bill Sloman wrote:
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.


    First I corrected the usual line wrap issues.

    In the latest LTSpice (24.1.0) it took me a good hour or two to find out why I was getting strange netlist errors for all the
    opamps
    in the circuit.

    This turned out to be .ENDS in the BAS70L model. Remove .ENDS and the issues go away.

    So this is the circuit I'm simulating in 24.1.0 with no component updates available.
    I'm expecting it to take 2 hours to complete.

    Thank you for your tip to wait 2 hours for results. For what it's worth,
    Bill's original LTSpice source worked for me "as is."

    It did for me too, but because it looked like simulation time would be long I moved it to another machine I use over remote desktop.
    On that machine LTSpice asked if I'd like the latest version so I upgraded to 24.1.0.
    After the upgrade I got very strange netlist errors which didn't mention BAS70L and it took a while to figure out the cause.

    I'm now revising the simulation time to a minimum of 4 days for 10 seconds. 24.1.0 seems to be faster.

    My computer seems to be faster. It mostly simulates at about 25msec/sec
    for me so I get my 10 seconds in about seven minutes of real time. There
    are spots early in the process where it slows down, but not for long.

    I pushed up R27 from 9.1R to 13R to make the Ic(Q6) and Ic(Q9) peak
    currents more nearly equal - you lose some base current in the second
    current mirror and R7 corrects for that.

    It doesn't make much difference to the third harmonic content in the
    output which is still only 59 dB below the fundamental. I suppose I
    ought to low pass filter the current through R30 with a filter with a
    1msec propagation delay, but that would be even more components.

    --
    Bill Sloman, Sydney

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Bill Sloman on Wed Jan 15 22:41:51 2025
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vm9tod$37i55$1@dont-email.me...
    On 16/01/2025 7:23 am, Edward Rawde wrote:
    "Don" <g@crcomp.net> wrote in message news:20250115a@crcomp.net...
    Edward Rawde wrote:
    Bill Sloman wrote:
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.


    First I corrected the usual line wrap issues.

    In the latest LTSpice (24.1.0) it took me a good hour or two to find out why I was getting strange netlist errors for all the
    opamps
    in the circuit.

    This turned out to be .ENDS in the BAS70L model. Remove .ENDS and the issues go away.

    So this is the circuit I'm simulating in 24.1.0 with no component updates available.
    I'm expecting it to take 2 hours to complete.

    Thank you for your tip to wait 2 hours for results. For what it's worth, >>> Bill's original LTSpice source worked for me "as is."

    It did for me too, but because it looked like simulation time would be long I moved it to another machine I use over remote
    desktop.
    On that machine LTSpice asked if I'd like the latest version so I upgraded to 24.1.0.
    After the upgrade I got very strange netlist errors which didn't mention BAS70L and it took a while to figure out the cause.

    I'm now revising the simulation time to a minimum of 4 days for 10 seconds. >> 24.1.0 seems to be faster.

    My computer seems to be faster. It mostly simulates at about 25msec/sec for me so I get my 10 seconds in about seven minutes of
    real time. There are spots early in the process where it slows down, but not for long.

    The Lenovo core i7 3.6GHz with SSD I'm running it on hasn't gone above 30us/s. If your computer is 1000 times faster I'd like to have one, otherwise there's another explanation somewhere.


    I pushed up R27 from 9.1R to 13R to make the Ic(Q6) and Ic(Q9) peak currents more nearly equal - you lose some base current in the
    second current mirror and R7 corrects for that.

    It doesn't make much difference to the third harmonic content in the output which is still only 59 dB below the fundamental. I
    suppose I ought to low pass filter the current through R30 with a filter with a 1msec propagation delay, but that would be even
    more components.

    --
    Bill Sloman, Sydney




    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Bill Sloman on Wed Jan 15 22:57:41 2025
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vm9tod$37i55$1@dont-email.me...
    On 16/01/2025 7:23 am, Edward Rawde wrote:
    "Don" <g@crcomp.net> wrote in message news:20250115a@crcomp.net...
    Edward Rawde wrote:
    Bill Sloman wrote:
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.


    First I corrected the usual line wrap issues.

    In the latest LTSpice (24.1.0) it took me a good hour or two to find out why I was getting strange netlist errors for all the
    opamps
    in the circuit.

    This turned out to be .ENDS in the BAS70L model. Remove .ENDS and the issues go away.

    So this is the circuit I'm simulating in 24.1.0 with no component updates available.
    I'm expecting it to take 2 hours to complete.

    Thank you for your tip to wait 2 hours for results. For what it's worth, >>> Bill's original LTSpice source worked for me "as is."

    It did for me too, but because it looked like simulation time would be long I moved it to another machine I use over remote
    desktop.
    On that machine LTSpice asked if I'd like the latest version so I upgraded to 24.1.0.
    After the upgrade I got very strange netlist errors which didn't mention BAS70L and it took a while to figure out the cause.

    I'm now revising the simulation time to a minimum of 4 days for 10 seconds. >> 24.1.0 seems to be faster.

    My computer seems to be faster. It mostly simulates at about 25msec/sec for me so I get my 10 seconds in about seven minutes of
    real time. There are spots early in the process where it slows down, but not for long.

    I pushed up R27 from 9.1R to 13R to make the Ic(Q6) and Ic(Q9) peak currents more nearly equal - you lose some base current in the
    second current mirror and R7 corrects for that.

    It doesn't make much difference to the third harmonic content in the output which is still only 59 dB below the fundamental. I
    suppose I ought to low pass filter the current through R30 with a filter with a 1msec propagation delay, but that would be even
    more components.

    With an FFT from 525-536ms with Blackman-Harris window I'm seeing nearly 100dB down at 1kHz and 80dB at 2kHz.
    But there's also crud only 60dB down at 600kHz where crud means an almost contiuous spectrum between 500kHz and 600kHz.



    --
    Bill Sloman, Sydney




    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Bill Sloman@21:1/5 to Edward Rawde on Thu Jan 16 18:45:13 2025
    On 16/01/2025 2:41 pm, Edward Rawde wrote:
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vm9tod$37i55$1@dont-email.me...
    On 16/01/2025 7:23 am, Edward Rawde wrote:
    "Don" <g@crcomp.net> wrote in message news:20250115a@crcomp.net...
    Edward Rawde wrote:
    Bill Sloman wrote:
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.


    First I corrected the usual line wrap issues.

    In the latest LTSpice (24.1.0) it took me a good hour or two to find out why I was getting strange netlist errors for all the
    opamps
    in the circuit.

    This turned out to be .ENDS in the BAS70L model. Remove .ENDS and the issues go away.

    So this is the circuit I'm simulating in 24.1.0 with no component updates available.
    I'm expecting it to take 2 hours to complete.

    Thank you for your tip to wait 2 hours for results. For what it's worth, >>>> Bill's original LTSpice source worked for me "as is."

    It did for me too, but because it looked like simulation time would be long I moved it to another machine I use over remote
    desktop.
    On that machine LTSpice asked if I'd like the latest version so I upgraded to 24.1.0.
    After the upgrade I got very strange netlist errors which didn't mention BAS70L and it took a while to figure out the cause.

    I'm now revising the simulation time to a minimum of 4 days for 10 seconds. >>> 24.1.0 seems to be faster.

    My computer seems to be faster. It mostly simulates at about 25msec/sec for me so I get my 10 seconds in about seven minutes of
    real time. There are spots early in the process where it slows down, but not for long.

    The Lenovo core i7 3.6GHz with SSD I'm running it on hasn't gone above 30us/s.
    If your computer is 1000 times faster I'd like to have one, otherwise there's another explanation somewhere.

    My computer uses an i5-3470 CPU running at 3.20GHz. It's more than ten
    years old. LTSpice uses my SSD card which isn't original, so your
    hardware ought to be even faster.

    <snip>

    --
    Bill Sloman, Sydney

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Bill Sloman@21:1/5 to Edward Rawde on Fri Jan 17 00:23:32 2025
    On 16/01/2025 2:57 pm, Edward Rawde wrote:
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vm9tod$37i55$1@dont-email.me...
    On 16/01/2025 7:23 am, Edward Rawde wrote:
    "Don" <g@crcomp.net> wrote in message news:20250115a@crcomp.net...
    Edward Rawde wrote:
    Bill Sloman wrote:
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.


    First I corrected the usual line wrap issues.

    In the latest LTSpice (24.1.0) it took me a good hour or two to find out why I was getting strange netlist errors for all the
    opamps
    in the circuit.

    This turned out to be .ENDS in the BAS70L model. Remove .ENDS and the issues go away.

    So this is the circuit I'm simulating in 24.1.0 with no component updates available.
    I'm expecting it to take 2 hours to complete.

    Thank you for your tip to wait 2 hours for results. For what it's worth, >>>> Bill's original LTSpice source worked for me "as is."

    It did for me too, but because it looked like simulation time would be long I moved it to another machine I use over remote
    desktop.
    On that machine LTSpice asked if I'd like the latest version so I upgraded to 24.1.0.
    After the upgrade I got very strange netlist errors which didn't mention BAS70L and it took a while to figure out the cause.

    I'm now revising the simulation time to a minimum of 4 days for 10 seconds. >>> 24.1.0 seems to be faster.

    My computer seems to be faster. It mostly simulates at about 25msec/sec for me so I get my 10 seconds in about seven minutes of
    real time. There are spots early in the process where it slows down, but not for long.

    I pushed up R27 from 9.1R to 13R to make the Ic(Q6) and Ic(Q9) peak currents more nearly equal - you lose some base current in the
    second current mirror and R7 corrects for that.

    It doesn't make much difference to the third harmonic content in the output which is still only 59 dB below the fundamental. I
    suppose I ought to low pass filter the current through R30 with a filter with a 1msec propagation delay, but that would be even
    more components.

    With an FFT from 525-536ms with Blackman-Harris window I'm seeing nearly 100dB down at 1kHz and 80dB at 2kHz.
    But there's also crud only 60dB down at 600kHz where crud means an almost contiuous spectrum between 500kHz and 600kHz.

    This sounds like a typo. The fundamental is at 1kHz, and I've set up the circuit so that it is just above 0dB. The second harmonic at 2kHz is
    about at -80dB, but the third harmonic at 3kHz is at about -60dB.
    Numerical integration does produce high frequency crud - also known as
    rounding error and quantisation error. We'd have to build a real circuit
    to get a credible idea of how it performed at high frequencies, and you
    have to build it fairly carefully to avoid lots of crud on the supply
    rails, which gets everywhere.

    My full-wave rectifier does do some fast switching, which could make it
    a noise source.

    --
    Bill Sloman, Sydney

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Bill Sloman on Thu Jan 16 09:51:57 2025
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmadei$3dim0$1@dont-email.me...
    On 16/01/2025 2:41 pm, Edward Rawde wrote:
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vm9tod$37i55$1@dont-email.me...
    On 16/01/2025 7:23 am, Edward Rawde wrote:
    "Don" <g@crcomp.net> wrote in message news:20250115a@crcomp.net...
    Edward Rawde wrote:
    Bill Sloman wrote:
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control
    the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.


    First I corrected the usual line wrap issues.

    In the latest LTSpice (24.1.0) it took me a good hour or two to find out why I was getting strange netlist errors for all the
    opamps
    in the circuit.

    This turned out to be .ENDS in the BAS70L model. Remove .ENDS and the issues go away.

    So this is the circuit I'm simulating in 24.1.0 with no component updates available.
    I'm expecting it to take 2 hours to complete.

    Thank you for your tip to wait 2 hours for results. For what it's worth, >>>>> Bill's original LTSpice source worked for me "as is."

    It did for me too, but because it looked like simulation time would be long I moved it to another machine I use over remote
    desktop.
    On that machine LTSpice asked if I'd like the latest version so I upgraded to 24.1.0.
    After the upgrade I got very strange netlist errors which didn't mention BAS70L and it took a while to figure out the cause.

    I'm now revising the simulation time to a minimum of 4 days for 10 seconds.
    24.1.0 seems to be faster.

    My computer seems to be faster. It mostly simulates at about 25msec/sec for me so I get my 10 seconds in about seven minutes of
    real time. There are spots early in the process where it slows down, but not for long.

    The Lenovo core i7 3.6GHz with SSD I'm running it on hasn't gone above 30us/s.
    If your computer is 1000 times faster I'd like to have one, otherwise there's another explanation somewhere.

    My computer uses an i5-3470 CPU running at 3.20GHz. It's more than ten years old. LTSpice uses my SSD card which isn't original,
    so your hardware ought to be even faster.

    So there's some reason I don't yet understand why my simulation of the same circuit is a lot slower.
    Simulation of the 120dB circuit I posted some time ago completes in minutes on either 24.1.0 or earlier versions.


    <snip>

    --
    Bill Sloman, Sydney




    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Bill Sloman on Thu Jan 16 09:49:39 2025
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmb18t$3h0dq$1@dont-email.me...
    On 16/01/2025 2:57 pm, Edward Rawde wrote:
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vm9tod$37i55$1@dont-email.me...
    On 16/01/2025 7:23 am, Edward Rawde wrote:
    "Don" <g@crcomp.net> wrote in message news:20250115a@crcomp.net...
    Edward Rawde wrote:
    Bill Sloman wrote:
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control
    the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.


    First I corrected the usual line wrap issues.

    In the latest LTSpice (24.1.0) it took me a good hour or two to find out why I was getting strange netlist errors for all the
    opamps
    in the circuit.

    This turned out to be .ENDS in the BAS70L model. Remove .ENDS and the issues go away.

    So this is the circuit I'm simulating in 24.1.0 with no component updates available.
    I'm expecting it to take 2 hours to complete.

    Thank you for your tip to wait 2 hours for results. For what it's worth, >>>>> Bill's original LTSpice source worked for me "as is."

    It did for me too, but because it looked like simulation time would be long I moved it to another machine I use over remote
    desktop.
    On that machine LTSpice asked if I'd like the latest version so I upgraded to 24.1.0.
    After the upgrade I got very strange netlist errors which didn't mention BAS70L and it took a while to figure out the cause.

    I'm now revising the simulation time to a minimum of 4 days for 10 seconds.
    24.1.0 seems to be faster.

    My computer seems to be faster. It mostly simulates at about 25msec/sec for me so I get my 10 seconds in about seven minutes of
    real time. There are spots early in the process where it slows down, but not for long.

    I pushed up R27 from 9.1R to 13R to make the Ic(Q6) and Ic(Q9) peak currents more nearly equal - you lose some base current in
    the
    second current mirror and R7 corrects for that.

    It doesn't make much difference to the third harmonic content in the output which is still only 59 dB below the fundamental. I
    suppose I ought to low pass filter the current through R30 with a filter with a 1msec propagation delay, but that would be even
    more components.

    With an FFT from 525-536ms with Blackman-Harris window I'm seeing nearly 100dB down at 1kHz and 80dB at 2kHz.
    But there's also crud only 60dB down at 600kHz where crud means an almost contiuous spectrum between 500kHz and 600kHz.

    This sounds like a typo.

    Ah yes, I meant 2kHz and 3kHz. 100dB down at 2kHz and 80dB down at 3 kHz from 754 to 778 ms, then it ran out of drive space.
    Crud has now moved to 1.5 MHz.

    The fundamental is at 1kHz, and I've set up the circuit so that it is just above 0dB. The second harmonic at 2kHz is about
    at -80dB, but the third harmonic at 3kHz is at about -60dB. Numerical integration does produce high frequency crud - also known as
    rounding error and quantisation error. We'd have to build a real circuit to get a credible idea of how it performed at high
    frequencies, and you have to build it fairly carefully to avoid lots of crud on the supply rails, which gets everywhere.

    My full-wave rectifier does do some fast switching, which could make it a noise source.

    --
    Bill Sloman, Sydney


    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Bill Sloman@21:1/5 to Bill Sloman on Tue Jan 21 02:19:45 2025
    On 15/01/2025 11:33 pm, Bill Sloman wrote:
    This just reworks my circuit to use a controllable asymmetric current
    mirror instead of the FET for gain control. I take the feedback from the
    full wave rectifier and switch every half-cycle to reconstruct a
    variable amplitude sine wave to control the output amplitude. It does
    use a lot of components, but it strikes me as fairly comprehensible.

    R30 isn't a real part - it's just there to let me do an FFT on the
    correction signal.

    The circuit just copes with worst case capacitors - 15.15nF and 14.85nF
    - at C5 and C6, as it was intended to do. Using a trim pot to take out component tolerances would let you get away with a smaller correction
    signal injecting smaller doses of the odd harmonics.

    The circuit does cry out for monolithic dual transisors.The On-Semi NST45010MW6T1G pnp and the
    NST45011MW6T1G npn parts are cheap and widely available.

    There was a dumb error in the original circuit. The two transistor
    switch (Q5 and Q6 in the original circuit) that turned the full wave
    rectified waveform back into a sine wave was set up with very little
    headroom. It didn't stop the circuit from working as intended after it
    had settled down, but it made start-up a bit tricky.

    Here's the corrected version. It's performance isn't noticeably differ

    Version 4
    SHEET 1 3608 920
    WIRE -1680 -2400 -1984 -2400
    WIRE -1360 -2400 -1680 -2400
    WIRE -1200 -2400 -1360 -2400
    WIRE -1104 -2400 -1200 -2400
    WIRE -736 -2400 -1104 -2400
    WIRE -320 -2400 -736 -2400
    WIRE 208 -2400 -320 -2400
    WIRE 336 -2400 208 -2400
    WIRE 576 -2400 336 -2400
    WIRE -736 -2384 -736 -2400
    WIRE 208 -2384 208 -2400
    WIRE -320 -2368 -320 -2400
    WIRE 3376 -2272 -1616 -2272
    WIRE 880 -2192 -1776 -2192
    WIRE -1360 -2160 -1360 -2400
    WIRE -736 -2160 -736 -2320
    WIRE -656 -2160 -736 -2160
    WIRE -320 -2160 -320 -2304
    WIRE -176 -2160 -320 -2160
    WIRE 208 -2144 208 -2320
    WIRE 336 -2144 208 -2144
    WIRE -1200 -2112 -1200 -2400
    WIRE -1680 -2096 -1680 -2400
    WIRE -1360 -2048 -1360 -2080
    WIRE -320 -2000 -320 -2160
    WIRE -736 -1984 -736 -2160
    WIRE -1776 -1968 -1776 -2192
    WIRE 336 -1968 336 -2144
    WIRE 576 -1968 576 -2400
    WIRE -1360 -1920 -1360 -1968
    WIRE -1200 -1920 -1200 -2032
    WIRE 1952 -1920 1744 -1920
    WIRE 2160 -1920 1952 -1920
    WIRE -1616 -1904 -1616 -2272
    WIRE 1376 -1904 1072 -1904
    WIRE 1536 -1904 1376 -1904
    WIRE 336 -1888 336 -1904
    WIRE -1280 -1872 -1296 -1872
    WIRE -1264 -1872 -1280 -1872
    WIRE -576 -1872 -912 -1872
    WIRE -32 -1872 -496 -1872
    WIRE 1744 -1872 1744 -1920
    WIRE 1072 -1856 1072 -1904
    WIRE 1952 -1824 1904 -1824
    WIRE 2160 -1824 2160 -1920
    WIRE 2160 -1824 2032 -1824
    WIRE -128 -1808 -272 -1808
    WIRE -32 -1808 -32 -1872
    WIRE -32 -1808 -64 -1808
    WIRE -1776 -1792 -1776 -1888
    WIRE -1776 -1792 -2064 -1792
    WIRE -1280 -1792 -1280 -1872
    WIRE -1200 -1792 -1200 -1824
    WIRE -1200 -1792 -1280 -1792
    WIRE -912 -1792 -912 -1872
    WIRE -864 -1792 -912 -1792
    WIRE -544 -1792 -784 -1792
    WIRE -1200 -1776 -1200 -1792
    WIRE 576 -1776 576 -1904
    WIRE 768 -1776 576 -1776
    WIRE 2160 -1776 2160 -1824
    WIRE 2288 -1776 2160 -1776
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    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C2
    SYMATTR Value 3.3p
    SYMBOL res -1792 -848 R0
    SYMATTR InstName R7
    SYMATTR Value 68
    SYMBOL pnp -1840 -1632 M180
    WINDOW 3 84 0 Left 2
    SYMATTR Value 2N5087
    SYMATTR InstName Q3
    SYMBOL res -1792 -1984 R0
    SYMATTR InstName R11
    SYMATTR Value 270k
    SYMBOL res -1632 -1920 R0
    SYMATTR InstName R21
    SYMATTR Value 47k
    SYMBOL pnp -1296 -1824 R180
    WINDOW 3 84 0 Left 2
    SYMATTR Value 2N5087
    SYMATTR InstName Q7
    SYMBOL pnp -1264 -1824 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q8
    SYMATTR Value 2N5087
    SYMBOL res -448 -1328 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R23
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=1
    SYMBOL res -1376 -2176 R0
    SYMATTR InstName R6
    SYMATTR Value 1.5k
    SYMBOL res -1216 -2128 R0
    SYMATTR InstName R24
    SYMATTR Value 1.5k
    SYMBOL pnp -1264 -1680 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q9
    SYMATTR Value 2N5087
    SYMBOL npn -1504 -1200 R0
    SYMATTR InstName Q10
    SYMATTR Value 2N5089
    SYMBOL res -1376 -2064 R0
    SYMATTR InstName R27
    SYMATTR Value 6.2
    SYMBOL Opamps\\LT1013 -1984 -1744 R0
    SYMATTR InstName U9
    SYMBOL res -560 -1744 R0
    SYMATTR InstName R20
    SYMATTR Value 120
    SYMBOL Opamps\\LT1056A 3264 -1088 R0
    SYMATTR InstName U10
    SYMBOL res 3136 -1328 R0
    SYMATTR InstName R25
    SYMATTR Value 10k
    SYMBOL res 3136 -944 R0
    SYMATTR InstName R29
    SYMATTR Value 10k
    SYMBOL res -976 -1632 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R30
    SYMATTR Value 1
    SYMATTR SpiceLine tol=1
    SYMBOL res -1008 -1296 R0
    SYMATTR InstName R31
    SYMATTR Value 20k
    SYMBOL res -1696 -2112 R0
    SYMATTR InstName R32
    SYMATTR Value 36k
    SYMATTR SpiceLine tol=1
    SYMBOL res -1696 -1344 R0
    SYMATTR InstName R33
    SYMATTR Value 18k
    SYMBOL npn -1584 -1424 R0
    SYMATTR InstName Q5
    SYMATTR Value 2N5089
    SYMBOL npn -1296 -1424 M0
    SYMATTR InstName Q5
    SYMATTR Value 2N5089
    TEXT -2232 -1200 Left 2 !.MODEL BAS70L D \n+ IS = 3.22E-9 \n+ N = 1.018
    \n+ BV = 77 \n+ IBV = 1.67E-7 \n+ RS = 20.89 \n+ CJO = 1.608E-12 \n+ VJ
    = 0.3891 \n+ M = 0.3683 \n+ FC = 0.5 \n+ EG = 0.69 \n+ XTI = 2 \n.ENDS
    TEXT -336 -528 Left 2 ;R2 a,b,c, Vishay Beschlag ACAS06S0830372P1AT
    precision 10k resistor array \n R1a, R1b Maxim MAX5492LB10000+T 10K
    resistive divider in a SOT-23-5 package
    TEXT -720 -464 Left 2 !.MODEL MMBF4391 NJF VTO=-4.6 BETA=0.02779
    LAMBDA=0.00595 RD=1 RS=1 IS=1e-14 CGD=14p CGS=10.5p PB=1 B=1 KF=1e-18
    AF=1 FC=0.5 mfg=Motorola
    TEXT -1112 -464 Left 2 !.tran 0 10s 0s startup

    --
    Bill Sloman, Sydney

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Bill Sloman on Mon Jan 20 15:59:26 2025
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmlpii$364is$7@dont-email.me...
    On 15/01/2025 11:33 pm, Bill Sloman wrote:
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.

    R30 isn't a real part - it's just there to let me do an FFT on the correction signal.

    The circuit just copes with worst case capacitors - 15.15nF and 14.85nF - at C5 and C6, as it was intended to do. Using a trim
    pot to take out component tolerances would let you get away with a smaller correction signal injecting smaller doses of the odd
    harmonics.

    The circuit does cry out for monolithic dual transisors.The On-Semi
    NST45010MW6T1G pnp and the
    NST45011MW6T1G npn parts are cheap and widely available.

    There was a dumb error in the original circuit. The two transistor switch (Q5 and Q6 in the original circuit) that turned the full
    wave rectified waveform back into a sine wave was set up with very little headroom. It didn't stop the circuit from working as
    intended after it had settled down, but it made start-up a bit tricky.

    Here's the corrected version. It's performance isn't noticeably differ


    Fix obvious line wraps.
    Search for Elektronik and fix remaining line wraps.
    Move U1 down to connected position and connect + supply.
    Save File.
    Attempt to start simulation but get "Duplicate Q5" message.
    Remove Q5 and copy Q10 (it's now Q4).
    Save file.
    Start simulation and click on Vout.
    Note simulation speed about 20us/s (core i7 SSD).
    Stop simulation.
    Move file to other remote desktopable computer running LTSpice 24.1.0
    Open schematic
    Attempt to run simulation but get strange errors, one for each of U1 - U10 Attempt to copy one of the errors but get unhelpful right click menu.
    Open log directly from file system to get exampe of error message:
    This sub-circuit name is not defined. X§U1 N040 N032 N005 N050 N039 LT1360
    Use previous experience to fix errors in seconds (rather than hours) by editing schematic file to remove .ENDS from BAS70 line.
    Start simulation and click on Vout.
    Note simulation speed of about 25us/s
    Leave simulation running but expect it to run out of disk space.
    Go back to other work on main computer.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Edward Rawde on Mon Jan 20 17:49:32 2025
    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vmmdff$10ii$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmlpii$364is$7@dont-email.me...
    On 15/01/2025 11:33 pm, Bill Sloman wrote:
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.

    R30 isn't a real part - it's just there to let me do an FFT on the correction signal.

    The circuit just copes with worst case capacitors - 15.15nF and 14.85nF - at C5 and C6, as it was intended to do. Using a trim
    pot to take out component tolerances would let you get away with a smaller correction signal injecting smaller doses of the odd
    harmonics.

    The circuit does cry out for monolithic dual transisors.The On-Semi
    NST45010MW6T1G pnp and the
    NST45011MW6T1G npn parts are cheap and widely available.

    There was a dumb error in the original circuit. The two transistor switch (Q5 and Q6 in the original circuit) that turned the
    full wave rectified waveform back into a sine wave was set up with very little headroom. It didn't stop the circuit from working
    as intended after it had settled down, but it made start-up a bit tricky.

    Here's the corrected version. It's performance isn't noticeably differ


    Check simulation at 180 ms
    raw file is now 32 GB
    FFT on a few cycles (approx 1V pk-pk) with blackman harris windows shows 80dB down at 3kHz.
    Stop simulation.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Bill Sloman@21:1/5 to Bill Sloman on Tue Jan 21 18:35:06 2025
    On 21/01/2025 2:19 am, Bill Sloman wrote:
    On 15/01/2025 11:33 pm, Bill Sloman wrote:
    This just reworks my circuit to use a controllable asymmetric current
    mirror instead of the FET for gain control. I take the feedback from
    the full wave rectifier and switch every half-cycle to reconstruct a
    variable amplitude sine wave to control the output amplitude. It does
    use a lot of components, but it strikes me as fairly comprehensible.

    R30 isn't a real part - it's just there to let me do an FFT on the
    correction signal.

    The circuit just copes with worst case capacitors - 15.15nF and
    14.85nF - at C5 and C6, as it was intended to do. Using a trim pot to
    take out component tolerances would let you get away with a smaller
    correction signal injecting smaller doses of the odd harmonics.

    The circuit does cry out for monolithic dual transisors.The On-Semi
    NST45010MW6T1G pnp and the
    NST45011MW6T1G npn parts are cheap and widely available.

    There was a dumb error in the original circuit. The two transistor
    switch (Q5 and Q6 in the original circuit) that turned the full wave rectified waveform back into a sine wave was set up with very little headroom. It didn't stop the circuit from working as intended after it
    had settled down, but it made start-up a bit tricky.

    Here's the corrected version. It's performance isn't noticeably different

    I've taken Edward Rawles commnents to heart,but I suspect he has
    inadvertently corrected the circuit into something that simulates a lot
    slower that the circuit I'm looking at, which runs at about 30msec/sec.

    I've corrected the right transistor to Q6. I've played with the text
    file in an attempt deal with the line feeds.

    U1 is an LT1360 and Linear Technology's LTSpice should know all about
    that. The relevant lines in the file are

    "SYMBOL Opamps\\LT1360 208 -1248 R0
    SYMATTR InstName U1"

    The BAS70L model file below is

    TEXT -2232 -1200 Left 2 !.MODEL BAS70L D
    \n+ IS = 3.22E-9
    \n+ N = 1.018
    \n+ BV = 77 \n+ IBV = 1.67E-7
    \n+ RS = 20.89
    \n+ CJO = 1.608E-12
    \n+ VJ = 0.3891
    \n+ M = 0.3683
    \n+ FC = 0.5
    \n+ EG = 0.69
    \n+ XTI = 2
    \n.ENDS

    The \n+ character string does seem to be the way WordPad deals with line
    wraps in the .asc file. Deleting .ENDS from the end of the model string
    may be one way of keepig LTSpice happy, but it probably isn't the right one.

    Version 4
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    WIRE 576 -720 576 -1168
    WIRE 768 -720 768 -736
    WIRE 768 -720 576 -720
    WIRE -1984 -704 -1984 -1648
    WIRE -1776 -704 -1776 -752
    WIRE -1776 -704 -1984 -704
    WIRE -1680 -704 -1680 -1248
    WIRE -1680 -704 -1776 -704
    WIRE -1440 -704 -1440 -912
    WIRE -1440 -704 -1680 -704
    WIRE -1104 -704 -1104 -880
    WIRE -1104 -704 -1440 -704
    WIRE -1040 -704 -1104 -704
    WIRE -992 -704 -992 -1200
    WIRE -992 -704 -1040 -704
    WIRE -656 -704 -656 -864
    WIRE -656 -704 -992 -704
    WIRE -176 -704 -176 -896
    WIRE -176 -704 -656 -704
    WIRE -80 -704 -80 -752
    WIRE 208 -704 208 -1152
    WIRE 208 -704 -80 -704
    WIRE 576 -704 576 -720
    WIRE 208 -624 208 -640
    WIRE 416 -624 208 -624
    WIRE 576 -624 576 -640
    WIRE 576 -624 416 -624
    WIRE 2992 -624 2992 -1360
    WIRE 2992 -624 576 -624
    WIRE 3264 -624 3264 -992
    WIRE 3264 -624 2992 -624
    FLAG 464 -1152 0
    FLAG -48 -1024 0
    FLAG -1264 -992 0
    FLAG 336 -2400 Vcc
    FLAG 416 -624 Vee
    FLAG -560 -1152 0
    FLAG 16 -1520 Vout
    FLAG 2576 -960 0
    FLAG 2432 -1456 Vcc
    FLAG -1040 -704 Vee
    FLAG -288 -1456 0
    FLAG 336 -1888 0
    FLAG 1376 -1904 filt1
    FLAG 1648 -1648 Vcc
    FLAG 1632 -1456 Vee
    FLAG 1520 -1152 0
    FLAG 1952 -1920 filter2
    FLAG 2432 -1584 0
    FLAG -2064 -1584 0
    SYMBOL Opamps\\LT1360 208 -1248 R0
    SYMATTR InstName U1
    SYMBOL res 48 -1344 R0
    WINDOW 0 41 37 Left 2
    WINDOW 3 36 71 Left 2
    SYMATTR InstName R1
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res -64 -1152 R0
    WINDOW 3 41 74 Left 2
    WINDOW 0 43 31 Left 2
    SYMATTR Value 4k02
    SYMATTR InstName R2
    SYMATTR SpiceLine tol=1
    SYMBOL cap -160 -1136 R0
    SYMATTR InstName C1
    SYMATTR Value 3.3n
    SYMBOL schottky 352 -1312 R0
    WINDOW 3 -89 62 Left 2
    WINDOW 0 -92 37 Left 2
    SYMATTR Value BAS70L
    SYMATTR InstName D1
    SYMBOL schottky 352 -1088 R0
    WINDOW 3 -78 61 Left 2
    WINDOW 0 -81 40 Left 2
    SYMATTR Value BAS70L
    SYMATTR InstName D2
    SYMBOL res 352 -1472 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R1a
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res 208 -1536 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R3
    SYMATTR Value 20k
    SYMATTR SpiceLine tol=1
    SYMBOL res 480 -1408 R0
    WINDOW 0 41 41 Left 2
    WINDOW 3 34 79 Left 2
    SYMATTR InstName R2a
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res 560 -928 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R2b
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res 720 -928 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R2c
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL cap 160 -960 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C4
    SYMATTR Value 3.3p
    SYMBOL res 48 -896 R0
    WINDOW 0 39 33 Left 2
    WINDOW 3 40 74 Left 2
    SYMATTR InstName R1b
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL voltage -1104 -1120 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    SYMATTR InstName V1
    SYMATTR Value 12
    SYMBOL voltage -1104 -976 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    SYMATTR InstName V2
    SYMATTR Value 12
    SYMBOL cap -448 -1600 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C5
    SYMATTR Value 15n
    SYMATTR SpiceLine V=63 Rser=4 Lser=12n
    SYMBOL res -448 -1568 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R4
    SYMATTR Value 10.7k
    SYMATTR SpiceLine tol=1
    SYMBOL cap -64 -1728 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C6
    SYMATTR Value 15n
    SYMATTR SpiceLine V=63 Rser=4 Lser=12n
    SYMBOL cap 3104 -1664 R180
    WINDOW 0 24 64 Left 2
    WINDOW 3 24 8 Left 2
    SYMATTR InstName C8
    SYMATTR Value 22n
    SYMBOL res 2848 -1760 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R10
    SYMATTR Value 220k
    SYMBOL Opamps\\LT1056A 2992 -1456 R0
    SYMATTR InstName U5
    SYMBOL cap 2784 -1120 R0
    SYMATTR InstName C10
    SYMATTR Value 3.3µ
    SYMBOL cap 2912 -1552 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C11
    SYMATTR Value 3.3p
    SYMBOL Opamps\\OP27 576 -1264 R0
    SYMATTR InstName U2
    SYMBOL FerriteBead 576 -672 R0
    SYMATTR InstName L2
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth
    Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 752 -1408 R0
    SYMATTR InstName C15
    SYMATTR Value 100n
    SYMBOL cap 752 -800 R0
    SYMATTR InstName C16
    SYMATTR Value 100n
    SYMBOL FerriteBead -176 -928 R0
    SYMATTR InstName L4
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth
    Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap -336 -2000 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C17
    SYMATTR Value 100n
    SYMBOL cap -336 -1168 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C18
    SYMATTR Value 100n
    SYMBOL cap 2272 -1184 R0
    SYMATTR InstName C21
    SYMATTR Value 100n
    SYMBOL FerriteBead 2288 -1408 R0
    SYMATTR InstName L7
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth
    Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL res -480 -1888 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R22
    SYMATTR Value 2.49k
    SYMATTR SpiceLine tol=1
    SYMBOL FerriteBead -320 -2336 R0
    SYMATTR InstName L8
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth
    Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap -752 -1984 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C7
    SYMATTR Value 100n
    SYMBOL FerriteBead -736 -2352 R0
    SYMATTR InstName L3
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth
    Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL FerriteBead -656 -896 R0
    SYMATTR InstName L9
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth
    Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap -864 -1152 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C23
    SYMATTR Value 100n
    SYMBOL res -160 -1600 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R26
    SYMATTR Value 10.7k
    SYMATTR SpiceLine tol=1
    SYMBOL res -768 -1808 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R5
    SYMATTR Value 4.99k
    SYMATTR SpiceLine tol=1
    SYMBOL cap -784 -1648 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C19
    SYMATTR Value 10p
    SYMBOL FerriteBead 208 -672 R0
    SYMATTR InstName L5
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth
    Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL FerriteBead 208 -2352 R0
    SYMATTR InstName L6
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth
    Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 320 -1968 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C20
    SYMATTR Value 100n
    SYMBOL cap -96 -816 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C22
    SYMATTR Value 100n
    SYMBOL References\\LTC6655-1.25 2560 -1120 R0
    SYMATTR InstName U4
    SYMBOL cap -64 -1824 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C9
    SYMATTR Value 10p
    SYMBOL FerriteBead 576 -1936 R0
    SYMATTR InstName L13
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth
    Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 704 -1088 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C13
    SYMATTR Value 10p
    SYMBOL res 2592 -1792 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R12
    SYMATTR Value 137k
    SYMBOL res 1376 -1776 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R8
    SYMATTR Value 14k
    SYMBOL res 1216 -1456 R0
    SYMATTR InstName R13
    SYMATTR Value 56k
    SYMBOL cap 1312 -1392 R0
    SYMATTR InstName C3
    SYMATTR Value 18n
    SYMBOL cap 1056 -1856 R0
    SYMATTR InstName C12
    SYMATTR Value 18n
    SYMBOL res 1216 -1568 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R14
    SYMATTR Value 14k
    SYMBOL Opamps\\LT1013 1392 -1632 R0
    SYMATTR InstName U6
    SYMBOL res 896 -1536 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R15
    SYMATTR Value 18.7k
    SYMBOL res 2048 -1840 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R16
    SYMATTR Value 14k
    SYMBOL cap 1728 -1872 R0
    SYMATTR InstName C14
    SYMATTR Value 18n
    SYMBOL res 1888 -1584 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R17
    SYMATTR Value 14k
    SYMBOL Opamps\\LT1013 2064 -1648 R0
    SYMATTR InstName U7
    SYMBOL res 1568 -1552 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R18
    SYMATTR Value 18.7k
    SYMBOL res 1888 -1408 R0
    SYMATTR InstName R19
    SYMATTR Value 56k
    SYMBOL cap 1984 -1344 R0
    SYMATTR InstName C24
    SYMATTR Value 18n
    SYMBOL npn -1504 -1008 R0
    SYMATTR InstName Q1
    SYMATTR Value 2N5089
    SYMBOL npn -1712 -1008 M0
    SYMATTR InstName Q2
    SYMATTR Value 2N5089
    SYMBOL res 2384 -1792 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R9
    SYMATTR Value 17k
    SYMBOL res 2416 -1728 R0
    SYMATTR InstName R28
    SYMATTR Value 68k
    SYMBOL Opamps\\LT1115 -656 -1472 R0
    SYMATTR InstName U3
    SYMBOL Opamps\\LT1115 -176 -1584 R0
    SYMATTR InstName U8
    SYMBOL cap 320 -1376 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C2
    SYMATTR Value 3.3p
    SYMBOL res -1792 -848 R0
    SYMATTR InstName R7
    SYMATTR Value 68
    SYMBOL pnp -1840 -1632 M180
    WINDOW 3 84 0 Left 2
    SYMATTR Value 2N5087
    SYMATTR InstName Q3
    SYMBOL res -1792 -1984 R0
    SYMATTR InstName R11
    SYMATTR Value 270k
    SYMBOL res -1632 -1920 R0
    SYMATTR InstName R21
    SYMATTR Value 47k
    SYMBOL pnp -1296 -1824 R180
    WINDOW 3 84 0 Left 2
    SYMATTR Value 2N5087
    SYMATTR InstName Q7
    SYMBOL pnp -1264 -1824 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q8
    SYMATTR Value 2N5087
    SYMBOL res -448 -1328 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R23
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=1
    SYMBOL res -1376 -2176 R0
    SYMATTR InstName R6
    SYMATTR Value 1.5k
    SYMBOL res -1216 -2128 R0
    SYMATTR InstName R24
    SYMATTR Value 1.5k
    SYMBOL pnp -1264 -1680 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q9
    SYMATTR Value 2N5087
    SYMBOL npn -1504 -1200 R0
    SYMATTR InstName Q10
    SYMATTR Value 2N5089
    SYMBOL res -1376 -2064 R0
    SYMATTR InstName R27
    SYMATTR Value 6.2
    SYMBOL Opamps\\LT1013 -1984 -1744 R0
    SYMATTR InstName U9
    SYMBOL res -560 -1744 R0
    SYMATTR InstName R20
    SYMATTR Value 120
    SYMBOL Opamps\\LT1056A 3264 -1088 R0
    SYMATTR InstName U10
    SYMBOL res 3136 -1328 R0
    SYMATTR InstName R25
    SYMATTR Value 10k
    SYMBOL res 3136 -944 R0
    SYMATTR InstName R29
    SYMATTR Value 10k
    SYMBOL res -976 -1632 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R30
    SYMATTR Value 1
    SYMATTR SpiceLine tol=1
    SYMBOL res -1008 -1296 R0
    SYMATTR InstName R31
    SYMATTR Value 20k
    SYMBOL res -1696 -2112 R0
    SYMATTR InstName R32
    SYMATTR Value 36k
    SYMATTR SpiceLine tol=1
    SYMBOL res -1696 -1344 R0
    SYMATTR InstName R33
    SYMATTR Value 18k
    SYMBOL npn -1584 -1424 R0
    SYMATTR InstName Q5
    SYMATTR Value 2N5089
    SYMBOL npn -1296 -1424 M0
    SYMATTR InstName Q6
    SYMATTR Value 2N5089
    TEXT -2232 -1200 Left 2 !.MODEL BAS70L D
    \n+ IS = 3.22E-9
    \n+ N = 1.018
    \n+ BV = 77 \n+ IBV = 1.67E-7
    \n+ RS = 20.89
    \n+ CJO = 1.608E-12
    \n+ VJ = 0.3891
    \n+ M = 0.3683
    \n+ FC = 0.5
    \n+ EG = 0.69
    \n+ XTI = 2
    \n.ENDS
    TEXT -336 -528 Left 2
    \;R2 a,b,c, Vishay Beschlag ACAS06S0830372P1AT precision 10k resistor
    \n at R1a, R1b
    \Maxim MAX5492LB10000+T 10K resistive divider in a SOT-23-5 package
    TEXT -720 -464 Left 2 !.MODEL MMBF4391 NJF VTO=-4.6 BETA=0.02779
    LAMBDA=0.00595 RD=1 RS=1 IS=1e-14 CGD=14p CGS=10.5p PB=1 B=1 KF=1e-18
    AF=1 FC=0.5 mfg=Motorola
    TEXT -1112 -464 Left 2 !.tran 0 10s 0s startup

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Bill Sloman on Tue Jan 21 11:08:46 2025
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmninh$3t6oi$1@dont-email.me...
    On 21/01/2025 2:19 am, Bill Sloman wrote:
    On 15/01/2025 11:33 pm, Bill Sloman wrote:
    This just reworks my circuit to use a controllable asymmetric current mirror instead of the FET for gain control. I take the
    feedback from the full wave rectifier and switch every half-cycle to reconstruct a variable amplitude sine wave to control the
    output amplitude. It does use a lot of components, but it strikes me as fairly comprehensible.

    R30 isn't a real part - it's just there to let me do an FFT on the correction signal.

    The circuit just copes with worst case capacitors - 15.15nF and 14.85nF - at C5 and C6, as it was intended to do. Using a trim
    pot to take out component tolerances would let you get away with a smaller correction signal injecting smaller doses of the odd
    harmonics.

    The circuit does cry out for monolithic dual transisors.The On-Semi
    NST45010MW6T1G pnp and the
    NST45011MW6T1G npn parts are cheap and widely available.

    There was a dumb error in the original circuit. The two transistor switch (Q5 and Q6 in the original circuit) that turned the
    full wave rectified waveform back into a sine wave was set up with very little headroom. It didn't stop the circuit from working
    as intended after it had settled down, but it made start-up a bit tricky.

    Here's the corrected version. It's performance isn't noticeably different

    I've taken Edward Rawles commnents to heart,but I suspect he has inadvertently corrected the circuit into something that simulates
    a lot slower that the circuit I'm looking at, which runs at about 30msec/sec.

    I've corrected the right transistor to Q6. I've played with the text file in an attempt deal with the line feeds.

    U1 is an LT1360 and Linear Technology's LTSpice should know all about that. The relevant lines in the file are

    "SYMBOL Opamps\\LT1360 208 -1248 R0
    SYMATTR InstName U1"

    The BAS70L model file below is

    TEXT -2232 -1200 Left 2 !.MODEL BAS70L D
    \n+ IS = 3.22E-9
    \n+ N = 1.018
    \n+ BV = 77 \n+ IBV = 1.67E-7
    \n+ RS = 20.89
    \n+ CJO = 1.608E-12
    \n+ VJ = 0.3891
    \n+ M = 0.3683
    \n+ FC = 0.5
    \n+ EG = 0.69
    \n+ XTI = 2
    \n.ENDS

    The \n+ character string does seem to be the way WordPad deals with line wraps in the .asc file.

    It's been many years since I forgot that WordPad even exists.
    Get yourself a real editor: https://notepad-plus-plus.org/
    I use it for editing files on both Windows and Linux (Over WinSCP).
    It may be worth noting that WordPad (which I just opened for the first time in seems like centuries) has a No wrap option under Word
    wrap.
    I'd set it to No wrap before pasting it into a post.

    Deleting .ENDS from the end of the model string may be one way of keepig LTSpice happy, but it probably isn't the right one.

    Then please tell us what the right way is when you get to testing LTSpice 24.1.0



    Make new folder Sloman 21 Jan 2025
    Make a new text file in the folder and rename it sloman.asc
    Copy all relevant lines from post starting with Version 4
    Open asc file with Notepad++ and paste lines.
    Search for Elektronik
    Fix 9 line wraps.
    Save file and attempt to open it in LTSpice 24.0.12
    Get error with \n+ IS = 3.22E-9 line.
    Open asc file with Notepad++
    Fix about 15 more line wraps with lines starting with \n and a few other lines. Note \ characters in line beginning with TEXT -336 -528 Left 2 these are not present in yesterday's file.
    Successfully open LTSpice to view a schematic.
    Note that U1 (LT1360) is displaced upwards such that the output is pointing at the centre of the letter B in the adjacent BAS70L
    Move U1 down so everything except + power is connected.
    Note that U1 + power wire ends about one resistor length above the U1 symbol. Connect U1 + power.
    Start simulation and click on Vout.
    Note simulation speed of about 20us/s

    Stop simulation, Save file, Close LTSpice.
    Open asc file with Notepad++
    Check that Word wrap is off and set EOL to Windows (CR LF). Save file.
    Open file with LTSpice. Schematic opens with no apparent issue and simulation runs at 20us/s. Close file.
    Open asc file with Notepad++. Edit, Select all, Copy.
    Paste into this post below.
    Note that \ characters in TEXT -336 -528 Left 2 line have now become \\
    Examine post after sending and make another post.

    Version 4
    SHEET 1 3608 920
    WIRE -1680 -2400 -1984 -2400
    WIRE -1360 -2400 -1680 -2400
    WIRE -1200 -2400 -1360 -2400
    WIRE -1104 -2400 -1200 -2400
    WIRE -736 -2400 -1104 -2400
    WIRE -320 -2400 -736 -2400
    WIRE 208 -2400 -320 -2400
    WIRE 336 -2400 208 -2400
    WIRE 576 -2400 336 -2400
    WIRE -736 -2384 -736 -2400
    WIRE 208 -2384 208 -2400
    WIRE -320 -2368 -320 -2400
    WIRE 3376 -2272 -1616 -2272
    WIRE 880 -2192 -1776 -2192
    WIRE -1360 -2160 -1360 -2400
    WIRE -736 -2160 -736 -2320
    WIRE -656 -2160 -736 -2160
    WIRE -320 -2160 -320 -2304
    WIRE -176 -2160 -320 -2160
    WIRE 208 -2144 208 -2320
    WIRE 336 -2144 208 -2144
    WIRE -1200 -2112 -1200 -2400
    WIRE -1680 -2096 -1680 -2400
    WIRE -1360 -2048 -1360 -2080
    WIRE -320 -2000 -320 -2160
    WIRE -736 -1984 -736 -2160
    WIRE -1776 -1968 -1776 -2192
    WIRE 336 -1968 336 -2144
    WIRE 576 -1968 576 -2400
    WIRE -1360 -1920 -1360 -1968
    WIRE -1200 -1920 -1200 -2032
    WIRE 1952 -1920 1744 -1920
    WIRE 2160 -1920 1952 -1920
    WIRE -1616 -1904 -1616 -2272
    WIRE 1376 -1904 1072 -1904
    WIRE 1536 -1904 1376 -1904
    WIRE 336 -1888 336 -1904
    WIRE -1280 -1872 -1296 -1872
    WIRE -1264 -1872 -1280 -1872
    WIRE -576 -1872 -912 -1872
    WIRE -32 -1872 -496 -1872
    WIRE 1744 -1872 1744 -1920
    WIRE 1072 -1856 1072 -1904
    WIRE 1952 -1824 1904 -1824
    WIRE 2160 -1824 2160 -1920
    WIRE 2160 -1824 2032 -1824
    WIRE -128 -1808 -272 -1808
    WIRE -32 -1808 -32 -1872
    WIRE -32 -1808 -64 -1808
    WIRE -1776 -1792 -1776 -1888
    WIRE -1776 -1792 -2064 -1792
    WIRE -1280 -1792 -1280 -1872
    WIRE -1200 -1792 -1200 -1824
    WIRE -1200 -1792 -1280 -1792
    WIRE -912 -1792 -912 -1872
    WIRE -864 -1792 -912 -1792
    WIRE -544 -1792 -784 -1792
    WIRE -1200 -1776 -1200 -1792
    WIRE 576 -1776 576 -1904
    WIRE 768 -1776 576 -1776
    WIRE 2160 -1776 2160 -1824
    WIRE 2288 -1776 2160 -1776
    WIRE 2432 -1776 2368 -1776
    WIRE 2496 -1776 2432 -1776
    WIRE 2800 -1776 2576 -1776
    WIRE 2864 -1776 2800 -1776
    WIRE 3088 -1776 2944 -1776
    WIRE 1280 -1760 1232 -1760
    WIRE 1536 -1760 1536 -1904
    WIRE 1536 -1760 1360 -1760
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    SYMBOL pnp -1296 -1824 R180
    WINDOW 3 84 0 Left 2
    SYMATTR Value 2N5087
    SYMATTR InstName Q7
    SYMBOL pnp -1264 -1824 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q8
    SYMATTR Value 2N5087
    SYMBOL res -448 -1328 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R23
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=1
    SYMBOL res -1376 -2176 R0
    SYMATTR InstName R6
    SYMATTR Value 1.5k
    SYMBOL res -1216 -2128 R0
    SYMATTR InstName R24
    SYMATTR Value 1.5k
    SYMBOL pnp -1264 -1680 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q9
    SYMATTR Value 2N5087
    SYMBOL npn -1504 -1200 R0
    SYMATTR InstName Q10
    SYMATTR Value 2N5089
    SYMBOL res -1376 -2064 R0
    SYMATTR InstName R27
    SYMATTR Value 6.2
    SYMBOL Opamps\\LT1013 -1984 -1744 R0
    SYMATTR InstName U9
    SYMBOL res -560 -1744 R0
    SYMATTR InstName R20
    SYMATTR Value 120
    SYMBOL Opamps\\LT1056A 3264 -1088 R0
    SYMATTR InstName U10
    SYMBOL res 3136 -1328 R0
    SYMATTR InstName R25
    SYMATTR Value 10k
    SYMBOL res 3136 -944 R0
    SYMATTR InstName R29
    SYMATTR Value 10k
    SYMBOL res -976 -1632 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R30
    SYMATTR Value 1
    SYMATTR SpiceLine tol=1
    SYMBOL res -1008 -1296 R0
    SYMATTR InstName R31
    SYMATTR Value 20k
    SYMBOL res -1696 -2112 R0
    SYMATTR InstName R32
    SYMATTR Value 36k
    SYMATTR SpiceLine tol=1
    SYMBOL res -1696 -1344 R0
    SYMATTR InstName R33
    SYMATTR Value 18k
    SYMBOL npn -1584 -1424 R0
    SYMATTR InstName Q5
    SYMATTR Value 2N5089
    SYMBOL npn -1296 -1424 M0
    SYMATTR InstName Q6
    SYMATTR Value 2N5089
    TEXT -2232 -1200 Left 2 !.MODEL BAS70L D \n+ IS = 3.22E-9 \n+ N = 1.018 \n+ BV = 77 \n+ IBV = 1.67E-7 \n+ RS = 20.89 \n+ CJO =
    1.608E-12 \n+ VJ = 0.3891 \n+ M = 0.3683 \n+ FC = 0.5 \n+ EG = 0.69 \n+ XTI = 2 \n.ENDS
    TEXT -336 -528 Left 2 ;\\;R2 a,b,c, Vishay Beschlag ACAS06S0830372P1AT precision 10k resistor \n at R1a, R1b \\Maxim
    MAX5492LB10000+T 10K resistive divider in a SOT-23-5 package
    TEXT -720 -464 Left 2 !.MODEL MMBF4391 NJF VTO=-4.6 BETA=0.02779 LAMBDA=0.00595 RD=1 RS=1 IS=1e-14 CGD=14p CGS=10.5p PB=1 B=1
    KF=1e-18 AF=1 FC=0.5 mfg=Motorola
    TEXT -1112 -464 Left 2 !.tran 0 10s 0s startup

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Edward Rawde on Tue Jan 21 11:58:15 2025
    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vmogqg$23tl$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmninh$3t6oi$1@dont-email.me...
    On 21/01/2025 2:19 am, Bill Sloman wrote:
    On 15/01/2025 11:33 pm, Bill Sloman wrote:

    Copy text from Version 4 to end of file directly from previous post.
    Paste into new asc file using Notepad++
    Note three line wraps near end of file with lines starting with 1.608E-12, MAX5492 and KF=1e-18
    Position cursor at beginning of wrapped part and use backspace key to unwrap it.
    Save file with no other changes. Schematic opens in LTSpice with no issues. Start simulation and click on Vout. Note simulation speed of about 20us/s
    Copy file to other computer running LTSpice 24.1.0
    Schematic opens without issues.
    Attempt to start simulation.
    Log file opens with errors claiming issues with U1 - U10. BAS70L is not mentioned.
    Close LTSpice.
    Edit asc file with Notepad++ to remove only .ENDS (note that includes the dot) from BAS70L line. Save file.
    Start simulation. Simulation runs at about 25us/s with no errors.
    Stop simulation.
    Note that log file opens claiming Simulation Failed when really it was just stopped. 24.0.12 doesn't do that.
    Examine schematic more closely.
    Find tiny extraneous piece of wire between R12/R28 and R10/C11. Remove it. Cannot find any other schematic issues. U1 and everything else looks as intended to me.
    Simulation still 25us/s
    Post schematic file below as it is now on 24.1.0

    Version 4.1
    SHEET 1 3608 920
    WIRE -1680 -2400 -1984 -2400
    WIRE -1360 -2400 -1680 -2400
    WIRE -1200 -2400 -1360 -2400
    WIRE -1104 -2400 -1200 -2400
    WIRE -736 -2400 -1104 -2400
    WIRE -320 -2400 -736 -2400
    WIRE 208 -2400 -320 -2400
    WIRE 336 -2400 208 -2400
    WIRE 576 -2400 336 -2400
    WIRE -736 -2384 -736 -2400
    WIRE 208 -2384 208 -2400
    WIRE -320 -2368 -320 -2400
    WIRE 3376 -2272 -1616 -2272
    WIRE 880 -2192 -1776 -2192
    WIRE -1360 -2160 -1360 -2400
    WIRE -736 -2160 -736 -2320
    WIRE -656 -2160 -736 -2160
    WIRE -320 -2160 -320 -2304
    WIRE -176 -2160 -320 -2160
    WIRE 208 -2144 208 -2320
    WIRE 336 -2144 208 -2144
    WIRE -1200 -2112 -1200 -2400
    WIRE -1680 -2096 -1680 -2400
    WIRE -1360 -2048 -1360 -2080
    WIRE -320 -2000 -320 -2160
    WIRE -736 -1984 -736 -2160
    WIRE -1776 -1968 -1776 -2192
    WIRE 336 -1968 336 -2144
    WIRE 576 -1968 576 -2400
    WIRE -1360 -1920 -1360 -1968
    WIRE -1200 -1920 -1200 -2032
    WIRE 1952 -1920 1744 -1920
    WIRE 2160 -1920 1952 -1920
    WIRE -1616 -1904 -1616 -2272
    WIRE 1376 -1904 1072 -1904
    WIRE 1536 -1904 1376 -1904
    WIRE 336 -1888 336 -1904
    WIRE -1280 -1872 -1296 -1872
    WIRE -1264 -1872 -1280 -1872
    WIRE -576 -1872 -912 -1872
    WIRE -32 -1872 -496 -1872
    WIRE 1744 -1872 1744 -1920
    WIRE 1072 -1856 1072 -1904
    WIRE 1952 -1824 1904 -1824
    WIRE 2160 -1824 2160 -1920
    WIRE 2160 -1824 2032 -1824
    WIRE -128 -1808 -272 -1808
    WIRE -32 -1808 -32 -1872
    WIRE -32 -1808 -64 -1808
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    WIRE -1776 -1792 -2064 -1792
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    WIRE -1200 -1792 -1200 -1824
    WIRE -1200 -1792 -1280 -1792
    WIRE -912 -1792 -912 -1872
    WIRE -864 -1792 -912 -1792
    WIRE -544 -1792 -784 -1792
    WIRE -1200 -1776 -1200 -1792
    WIRE 576 -1776 576 -1904
    WIRE 768 -1776 576 -1776
    WIRE 2160 -1776 2160 -1824
    WIRE 2288 -1776 2160 -1776
    WIRE 2432 -1776 2368 -1776
    WIRE 2496 -1776 2432 -1776
    WIRE 2800 -1776 2576 -1776
    WIRE 2864 -1776 2800 -1776
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    WIRE 1280 -1760 1232 -1760
    WIRE 1536 -1760 1536 -1904
    WIRE 1536 -1760 1360 -1760
    WIRE -1776 -1728 -1776 -1792
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    WIRE -1360 -1728 -1520 -1728
    WIRE -1264 -1728 -1360 -1728
    WIRE -544 -1728 -544 -1792
    WIRE 3088 -1728 3088 -1776
    WIRE -1984 -1712 -1984 -2400
    WIRE -272 -1712 -272 -1808
    WIRE -128 -1712 -272 -1712
    WIRE -32 -1712 -32 -1808
    WIRE -32 -1712 -64 -1712
    WIRE 2432 -1712 2432 -1776
    WIRE -2064 -1696 -2064 -1792
    WIRE -2016 -1696 -2064 -1696
    WIRE -1840 -1680 -1952 -1680
    WIRE -2016 -1664 -2064 -1664
    WIRE 1648 -1648 1392 -1648
    WIRE 2064 -1648 1648 -1648
    WIRE -912 -1632 -912 -1792
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    WIRE -544 -1632 -544 -1648
    WIRE -544 -1632 -784 -1632
    WIRE -1200 -1616 -1200 -1680
    WIRE -1200 -1616 -1360 -1616
    WIRE -1072 -1616 -1200 -1616
    WIRE -912 -1616 -912 -1632
    WIRE -912 -1616 -992 -1616
    WIRE -272 -1616 -272 -1712
    WIRE -144 -1616 -272 -1616
    WIRE -32 -1616 -32 -1712
    WIRE -32 -1616 -64 -1616
    WIRE 2064 -1616 2064 -1648
    WIRE 1392 -1600 1392 -1648
    WIRE 1904 -1600 1904 -1824
    WIRE 2032 -1600 1904 -1600
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    WIRE -512 -1584 -544 -1584
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    WIRE -272 -1584 -272 -1616
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    WIRE 1232 -1584 1232 -1760
    WIRE 1360 -1584 1232 -1584
    WIRE 2160 -1584 2160 -1776
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    WIRE 2432 -1584 2432 -1632
    WIRE 1536 -1568 1536 -1760
    WIRE 1536 -1568 1424 -1568
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    WIRE -912 -1424 -912 -1616
    WIRE -688 -1424 -912 -1424
    WIRE 2992 -1424 2992 -1456
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    WIRE -544 -1408 -624 -1408
    WIRE 768 -1408 768 -1776
    WIRE 2800 -1408 2800 -1536
    WIRE 2960 -1408 2800 -1408
    WIRE -688 -1392 -704 -1392
    WIRE 496 -1392 496 -1456
    WIRE 1328 -1392 1328 -1552
    WIRE 1904 -1392 1904 -1600
    WIRE 3088 -1392 3088 -1536
    WIRE 3088 -1392 3024 -1392
    WIRE 3152 -1392 3088 -1392
    WIRE -1680 -1376 -1680 -2016
    WIRE -1584 -1376 -1680 -1376
    WIRE -992 -1376 -1296 -1376
    WIRE 2960 -1376 2800 -1376
    WIRE 144 -1360 144 -1456
    WIRE 256 -1360 144 -1360
    WIRE 368 -1360 368 -1456
    WIRE 368 -1360 320 -1360
    WIRE -992 -1344 -992 -1376
    WIRE -432 -1344 -992 -1344
    WIRE 64 -1344 64 -1520
    WIRE 64 -1344 -352 -1344
    WIRE 2000 -1344 2000 -1568
    WIRE -1680 -1328 -1680 -1376
    WIRE 64 -1328 64 -1344
    WIRE 368 -1312 368 -1360
    WIRE 3152 -1312 3152 -1392
    WIRE -1520 -1296 -1520 -1328
    WIRE -1440 -1296 -1520 -1296
    WIRE -1360 -1296 -1360 -1328
    WIRE -1360 -1296 -1440 -1296
    WIRE -992 -1280 -992 -1344
    WIRE 2288 -1264 2288 -1376
    WIRE 2384 -1264 2288 -1264
    WIRE 576 -1232 576 -1776
    WIRE -736 -1216 -736 -1920
    WIRE -736 -1216 -848 -1216
    WIRE -704 -1216 -704 -1392
    WIRE -704 -1216 -736 -1216
    WIRE -560 -1216 -704 -1216
    WIRE -320 -1216 -320 -1936
    WIRE -320 -1216 -560 -1216
    WIRE 208 -1216 208 -2144
    WIRE 432 -1216 432 -1520
    WIRE 496 -1216 496 -1312
    WIRE 496 -1216 432 -1216
    WIRE 544 -1216 496 -1216
    WIRE -1440 -1200 -1440 -1296
    WIRE 64 -1200 64 -1248
    WIRE 144 -1200 144 -1360
    WIRE 144 -1200 64 -1200
    WIRE 176 -1200 144 -1200
    WIRE 880 -1200 880 -1552
    WIRE 880 -1200 608 -1200
    WIRE 368 -1184 368 -1248
    WIRE 368 -1184 240 -1184
    WIRE 544 -1184 464 -1184
    WIRE 2288 -1184 2288 -1264
    WIRE -320 -1168 -320 -1216
    WIRE -48 -1168 -144 -1168
    WIRE 176 -1168 -48 -1168
    WIRE 1232 -1168 1232 -1360
    WIRE 1328 -1168 1328 -1328
    WIRE 1328 -1168 1232 -1168
    WIRE 1520 -1168 1328 -1168
    WIRE 1904 -1168 1904 -1312
    WIRE 1904 -1168 1520 -1168
    WIRE 2000 -1168 2000 -1280
    WIRE 2000 -1168 1904 -1168
    WIRE -1776 -1152 -1776 -1632
    WIRE -1504 -1152 -1776 -1152
    WIRE -848 -1152 -848 -1216
    WIRE -560 -1152 -560 -1216
    WIRE 464 -1152 464 -1184
    WIRE 1520 -1152 1520 -1168
    WIRE 2384 -1152 2384 -1264
    WIRE 2416 -1152 2384 -1152
    WIRE 2752 -1152 2704 -1152
    WIRE 2800 -1152 2800 -1376
    WIRE 2800 -1152 2752 -1152
    WIRE -144 -1136 -144 -1168
    WIRE -48 -1136 -48 -1168
    WIRE 2800 -1120 2800 -1152
    WIRE -1104 -1104 -1104 -2400
    WIRE 368 -1088 368 -1184
    WIRE 2384 -1088 2384 -1152
    WIRE 2416 -1088 2384 -1088
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    WIRE -1440 -1072 -1440 -1104
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    WIRE 432 -1072 432 -1216
    WIRE 640 -1072 432 -1072
    WIRE 880 -1072 880 -1200
    WIRE 880 -1072 704 -1072
    WIRE 3264 -1056 3264 -1456
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    WIRE -80 -1040 -144 -1040
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    WIRE -48 -1040 -80 -1040
    WIRE 3152 -1040 3152 -1232
    WIRE 3232 -1040 3152 -1040
    WIRE -48 -1024 -48 -1040
    WIRE 3376 -1024 3376 -2272
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    WIRE -1776 -1008 -1776 -1152
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    WIRE -1104 -1008 -1264 -1008
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    WIRE -656 -1008 -848 -1008
    WIRE -320 -1008 -320 -1104
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    WIRE -176 -1008 -320 -1008
    WIRE 768 -1008 768 -1344
    WIRE 2288 -1008 2288 -1120
    WIRE 2288 -1008 768 -1008
    WIRE 2560 -1008 2560 -1056
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    WIRE 880 -912 880 -1072
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    WIRE 576 -624 416 -624
    WIRE 2992 -624 2992 -1360
    WIRE 2992 -624 576 -624
    WIRE 3264 -624 3264 -992
    WIRE 3264 -624 2992 -624
    FLAG 464 -1152 0
    FLAG -48 -1024 0
    FLAG -1264 -992 0
    FLAG 336 -2400 Vcc
    FLAG 416 -624 Vee
    FLAG -560 -1152 0
    FLAG 16 -1520 Vout
    FLAG 2576 -960 0
    FLAG 2432 -1456 Vcc
    FLAG -1040 -704 Vee
    FLAG -288 -1456 0
    FLAG 336 -1888 0
    FLAG 1376 -1904 filt1
    FLAG 1648 -1648 Vcc
    FLAG 1632 -1456 Vee
    FLAG 1520 -1152 0
    FLAG 1952 -1920 filter2
    FLAG 2432 -1584 0
    FLAG -2064 -1584 0
    SYMBOL Opamps\\LT1360 208 -1184 R0
    SYMATTR InstName U1
    SYMBOL res 48 -1344 R0
    WINDOW 0 41 37 Left 2
    WINDOW 3 36 71 Left 2
    SYMATTR InstName R1
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res -64 -1152 R0
    WINDOW 3 41 74 Left 2
    WINDOW 0 43 31 Left 2
    SYMATTR Value 4k02
    SYMATTR InstName R2
    SYMATTR SpiceLine tol=1
    SYMBOL cap -160 -1136 R0
    SYMATTR InstName C1
    SYMATTR Value 3.3n
    SYMBOL schottky 352 -1312 R0
    WINDOW 3 -89 62 Left 2
    WINDOW 0 -92 37 Left 2
    SYMATTR Value BAS70L
    SYMATTR InstName D1
    SYMBOL schottky 352 -1088 R0
    WINDOW 3 -78 61 Left 2
    WINDOW 0 -81 40 Left 2
    SYMATTR Value BAS70L
    SYMATTR InstName D2
    SYMBOL res 352 -1472 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R1a
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res 208 -1536 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R3
    SYMATTR Value 20k
    SYMATTR SpiceLine tol=1
    SYMBOL res 480 -1408 R0
    WINDOW 0 41 41 Left 2
    WINDOW 3 34 79 Left 2
    SYMATTR InstName R2a
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res 560 -928 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R2b
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res 720 -928 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R2c
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL cap 160 -960 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C4
    SYMATTR Value 3.3p
    SYMBOL res 48 -896 R0
    WINDOW 0 39 33 Left 2
    WINDOW 3 40 74 Left 2
    SYMATTR InstName R1b
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL voltage -1104 -1120 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    SYMATTR InstName V1
    SYMATTR Value 12
    SYMBOL voltage -1104 -976 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    SYMATTR InstName V2
    SYMATTR Value 12
    SYMBOL cap -448 -1600 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C5
    SYMATTR Value 15n
    SYMATTR SpiceLine V=63 Rser=4 Lser=12n
    SYMBOL res -448 -1568 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R4
    SYMATTR Value 10.7k
    SYMATTR SpiceLine tol=1
    SYMBOL cap -64 -1728 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C6
    SYMATTR Value 15n
    SYMATTR SpiceLine V=63 Rser=4 Lser=12n
    SYMBOL cap 3104 -1664 R180
    WINDOW 0 24 64 Left 2
    WINDOW 3 24 8 Left 2
    SYMATTR InstName C8
    SYMATTR Value 22n
    SYMBOL res 2848 -1760 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R10
    SYMATTR Value 220k
    SYMBOL Opamps\\LT1056A 2992 -1456 R0
    SYMATTR InstName U5
    SYMBOL cap 2784 -1120 R0
    SYMATTR InstName C10
    SYMATTR Value 3.3µ
    SYMBOL cap 2912 -1552 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C11
    SYMATTR Value 3.3p
    SYMBOL Opamps\\OP27 576 -1264 R0
    SYMATTR InstName U2
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    SYMATTR InstName L2
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 752 -1408 R0
    SYMATTR InstName C15
    SYMATTR Value 100n
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    SYMATTR InstName C16
    SYMATTR Value 100n
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    SYMATTR InstName L4
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap -336 -2000 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C17
    SYMATTR Value 100n
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    WINDOW 0 -60 15 Left 2
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    SYMATTR InstName C18
    SYMATTR Value 100n
    SYMBOL cap 2272 -1184 R0
    SYMATTR InstName C21
    SYMATTR Value 100n
    SYMBOL FerriteBead 2288 -1408 R0
    SYMATTR InstName L7
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL res -480 -1888 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R22
    SYMATTR Value 2.49k
    SYMATTR SpiceLine tol=1
    SYMBOL FerriteBead -320 -2336 R0
    SYMATTR InstName L8
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap -752 -1984 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C7
    SYMATTR Value 100n
    SYMBOL FerriteBead -736 -2352 R0
    SYMATTR InstName L3
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL FerriteBead -656 -896 R0
    SYMATTR InstName L9
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap -864 -1152 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C23
    SYMATTR Value 100n
    SYMBOL res -160 -1600 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R26
    SYMATTR Value 10.7k
    SYMATTR SpiceLine tol=1
    SYMBOL res -768 -1808 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R5
    SYMATTR Value 4.99k
    SYMATTR SpiceLine tol=1
    SYMBOL cap -784 -1648 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C19
    SYMATTR Value 10p
    SYMBOL FerriteBead 208 -672 R0
    SYMATTR InstName L5
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL FerriteBead 208 -2352 R0
    SYMATTR InstName L6
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 320 -1968 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C20
    SYMATTR Value 100n
    SYMBOL cap -96 -816 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C22
    SYMATTR Value 100n
    SYMBOL References\\LTC6655-1.25 2560 -1120 R0
    SYMATTR InstName U4
    SYMBOL cap -64 -1824 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C9
    SYMATTR Value 10p
    SYMBOL FerriteBead 576 -1936 R0
    SYMATTR InstName L13
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 704 -1088 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C13
    SYMATTR Value 10p
    SYMBOL res 2592 -1792 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
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    SYMATTR Value 137k
    SYMBOL res 1376 -1776 R90
    WINDOW 0 0 56 VBottom 2
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    SYMATTR InstName R8
    SYMATTR Value 14k
    SYMBOL res 1216 -1456 R0
    SYMATTR InstName R13
    SYMATTR Value 56k
    SYMBOL cap 1312 -1392 R0
    SYMATTR InstName C3
    SYMATTR Value 18n
    SYMBOL cap 1056 -1856 R0
    SYMATTR InstName C12
    SYMATTR Value 18n
    SYMBOL res 1216 -1568 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R14
    SYMATTR Value 14k
    SYMBOL Opamps\\LT1013 1392 -1632 R0
    SYMATTR InstName U6
    SYMBOL res 896 -1536 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R15
    SYMATTR Value 18.7k
    SYMBOL res 2048 -1840 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R16
    SYMATTR Value 14k
    SYMBOL cap 1728 -1872 R0
    SYMATTR InstName C14
    SYMATTR Value 18n
    SYMBOL res 1888 -1584 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R17
    SYMATTR Value 14k
    SYMBOL Opamps\\LT1013 2064 -1648 R0
    SYMATTR InstName U7
    SYMBOL res 1568 -1552 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R18
    SYMATTR Value 18.7k
    SYMBOL res 1888 -1408 R0
    SYMATTR InstName R19
    SYMATTR Value 56k
    SYMBOL cap 1984 -1344 R0
    SYMATTR InstName C24
    SYMATTR Value 18n
    SYMBOL npn -1504 -1008 R0
    SYMATTR InstName Q1
    SYMATTR Value 2N5089
    SYMBOL npn -1712 -1008 M0
    SYMATTR InstName Q2
    SYMATTR Value 2N5089
    SYMBOL res 2384 -1792 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
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    SYMBOL res 2416 -1728 R0
    SYMATTR InstName R28
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    SYMBOL Opamps\\LT1115 -656 -1472 R0
    SYMATTR InstName U3
    SYMBOL Opamps\\LT1115 -176 -1584 R0
    SYMATTR InstName U8
    SYMBOL cap 320 -1376 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C2
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    SYMATTR Value 68
    SYMBOL pnp -1840 -1632 M180
    WINDOW 3 84 0 Left 2
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    SYMATTR InstName Q3
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    SYMATTR InstName R11
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    SYMATTR InstName R21
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    WINDOW 3 84 0 Left 2
    SYMATTR Value 2N5087
    SYMATTR InstName Q7
    SYMBOL pnp -1264 -1824 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q8
    SYMATTR Value 2N5087
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    WINDOW 3 5 56 VBottom 2
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    SYMATTR SpiceLine tol=1
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    SYMATTR InstName R6
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    SYMBOL res -1216 -2128 R0
    SYMATTR InstName R24
    SYMATTR Value 1.5k
    SYMBOL pnp -1264 -1680 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q9
    SYMATTR Value 2N5087
    SYMBOL npn -1504 -1200 R0
    SYMATTR InstName Q10
    SYMATTR Value 2N5089
    SYMBOL res -1376 -2064 R0
    SYMATTR InstName R27
    SYMATTR Value 6.2
    SYMBOL Opamps\\LT1013 -1984 -1744 R0
    SYMATTR InstName U9
    SYMBOL res -560 -1744 R0
    SYMATTR InstName R20
    SYMATTR Value 120
    SYMBOL Opamps\\LT1056A 3264 -1088 R0
    SYMATTR InstName U10
    SYMBOL res 3136 -1328 R0
    SYMATTR InstName R25
    SYMATTR Value 10k
    SYMBOL res 3136 -944 R0
    SYMATTR InstName R29
    SYMATTR Value 10k
    SYMBOL res -976 -1632 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R30
    SYMATTR Value 1
    SYMATTR SpiceLine tol=1
    SYMBOL res -1008 -1296 R0
    SYMATTR InstName R31
    SYMATTR Value 20k
    SYMBOL res -1696 -2112 R0
    SYMATTR InstName R32
    SYMATTR Value 36k
    SYMATTR SpiceLine tol=1
    SYMBOL res -1696 -1344 R0
    SYMATTR InstName R33
    SYMATTR Value 18k
    SYMBOL npn -1584 -1424 R0
    SYMATTR InstName Q5
    SYMATTR Value 2N5089
    SYMBOL npn -1296 -1424 M0
    SYMATTR InstName Q6
    SYMATTR Value 2N5089
    TEXT -2232 -1200 Left 2 !.MODEL BAS70L D \n+ IS = 3.22E-9 \n+ N = 1.018 \n+ BV = 77 \n+ IBV = 1.67E-7 \n+ RS = 20.89 \n+ CJO =
    1.608E-12 \n+ VJ = 0.3891 \n+ M = 0.3683 \n+ FC = 0.5 \n+ EG = 0.69 \n+ XTI = 2 \n
    TEXT -336 -528 Left 2 ;\\;R2 a,b,c, Vishay Beschlag ACAS06S0830372P1AT precision 10k resistor \n at R1a, R1b \\Maxim
    MAX5492LB10000+T 10K resistive divider in a SOT-23-5 package
    TEXT -720 -464 Left 2 !.MODEL MMBF4391 NJF VTO=-4.6 BETA=0.02779 LAMBDA=0.00595 RD=1 RS=1 IS=1e-14 CGD=14p CGS=10.5p PB=1 B=1
    KF=1e-18 AF=1 FC=0.5 mfg=Motorola
    TEXT -1112 -464 Left 2 !.tran 0 10s 0s startup

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to john larkin on Tue Jan 21 14:52:03 2025
    "john larkin" <jl@glen--canyon.com> wrote in message news:uitvojh0a603a326e46go11qqcc1o1sv3p@4ax.com...
    On Tue, 21 Jan 2025 11:58:15 -0500, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vmogqg$23tl$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmninh$3t6oi$1@dont-email.me...
    On 21/01/2025 2:19 am, Bill Sloman wrote:
    On 15/01/2025 11:33 pm, Bill Sloman wrote:

    ...


    That circuit is of the category known as "component rich."

    What simulation speed do you get?




    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to invalid@invalid.invalid on Tue Jan 21 12:09:30 2025
    On Tue, 21 Jan 2025 14:52:03 -0500, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@glen--canyon.com> wrote in message news:uitvojh0a603a326e46go11qqcc1o1sv3p@4ax.com...
    On Tue, 21 Jan 2025 11:58:15 -0500, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vmogqg$23tl$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmninh$3t6oi$1@dont-email.me...
    On 21/01/2025 2:19 am, Bill Sloman wrote:
    On 15/01/2025 11:33 pm, Bill Sloman wrote:

    ...


    That circuit is of the category known as "component rich."

    What simulation speed do you get?





    That's too repulsive to sumulate.

    A super-low distortion oscillator would be interesting, but a few
    fundamental issues would need to be addressed first.

    I'd expect that a 1 PPM THD, variable fequency sine generator
    shouldn't be too difficult, but how would you measure it?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to invalid@invalid.invalid on Tue Jan 21 11:33:47 2025
    On Tue, 21 Jan 2025 11:58:15 -0500, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vmogqg$23tl$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmninh$3t6oi$1@dont-email.me...
    On 21/01/2025 2:19 am, Bill Sloman wrote:
    On 15/01/2025 11:33 pm, Bill Sloman wrote:

    Copy text from Version 4 to end of file directly from previous post.
    Paste into new asc file using Notepad++
    Note three line wraps near end of file with lines starting with 1.608E-12, MAX5492 and KF=1e-18
    Position cursor at beginning of wrapped part and use backspace key to unwrap it.
    Save file with no other changes. Schematic opens in LTSpice with no issues. >Start simulation and click on Vout. Note simulation speed of about 20us/s >Copy file to other computer running LTSpice 24.1.0
    Schematic opens without issues.
    Attempt to start simulation.
    Log file opens with errors claiming issues with U1 - U10. BAS70L is not mentioned.
    Close LTSpice.
    Edit asc file with Notepad++ to remove only .ENDS (note that includes the dot) from BAS70L line. Save file.
    Start simulation. Simulation runs at about 25us/s with no errors.
    Stop simulation.
    Note that log file opens claiming Simulation Failed when really it was just stopped. 24.0.12 doesn't do that.
    Examine schematic more closely.
    Find tiny extraneous piece of wire between R12/R28 and R10/C11. Remove it. >Cannot find any other schematic issues. U1 and everything else looks as intended to me.
    Simulation still 25us/s
    Post schematic file below as it is now on 24.1.0

    Version 4.1
    SHEET 1 3608 920
    WIRE -1680 -2400 -1984 -2400
    WIRE -1360 -2400 -1680 -2400
    WIRE -1200 -2400 -1360 -2400
    WIRE -1104 -2400 -1200 -2400
    WIRE -736 -2400 -1104 -2400
    WIRE -320 -2400 -736 -2400
    WIRE 208 -2400 -320 -2400
    WIRE 336 -2400 208 -2400
    WIRE 576 -2400 336 -2400
    WIRE -736 -2384 -736 -2400
    WIRE 208 -2384 208 -2400
    WIRE -320 -2368 -320 -2400
    WIRE 3376 -2272 -1616 -2272
    WIRE 880 -2192 -1776 -2192
    WIRE -1360 -2160 -1360 -2400
    WIRE -736 -2160 -736 -2320
    WIRE -656 -2160 -736 -2160
    WIRE -320 -2160 -320 -2304
    WIRE -176 -2160 -320 -2160
    WIRE 208 -2144 208 -2320
    WIRE 336 -2144 208 -2144
    WIRE -1200 -2112 -1200 -2400
    WIRE -1680 -2096 -1680 -2400
    WIRE -1360 -2048 -1360 -2080
    WIRE -320 -2000 -320 -2160
    WIRE -736 -1984 -736 -2160
    WIRE -1776 -1968 -1776 -2192
    WIRE 336 -1968 336 -2144
    WIRE 576 -1968 576 -2400
    WIRE -1360 -1920 -1360 -1968
    WIRE -1200 -1920 -1200 -2032
    WIRE 1952 -1920 1744 -1920
    WIRE 2160 -1920 1952 -1920
    WIRE -1616 -1904 -1616 -2272
    WIRE 1376 -1904 1072 -1904
    WIRE 1536 -1904 1376 -1904
    WIRE 336 -1888 336 -1904
    WIRE -1280 -1872 -1296 -1872
    WIRE -1264 -1872 -1280 -1872
    WIRE -576 -1872 -912 -1872
    WIRE -32 -1872 -496 -1872
    WIRE 1744 -1872 1744 -1920
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    WIRE -128 -1808 -272 -1808
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    WIRE -1200 -1792 -1200 -1824
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    WIRE -1200 -1776 -1200 -1792
    WIRE 576 -1776 576 -1904
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    WIRE 2160 -1776 2160 -1824
    WIRE 2288 -1776 2160 -1776
    WIRE 2432 -1776 2368 -1776
    WIRE 2496 -1776 2432 -1776
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    WIRE -544 -1728 -544 -1792
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    WIRE -1984 -1712 -1984 -2400
    WIRE -272 -1712 -272 -1808
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    WIRE -32 -1712 -32 -1808
    WIRE -32 -1712 -64 -1712
    WIRE 2432 -1712 2432 -1776
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    WIRE -2016 -1696 -2064 -1696
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    WIRE -2016 -1664 -2064 -1664
    WIRE 1648 -1648 1392 -1648
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    WIRE -544 -1632 -544 -1648
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    WIRE -1200 -1616 -1200 -1680
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    WIRE -1072 -1616 -1200 -1616
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    WIRE -912 -1616 -992 -1616
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    WIRE -144 -1616 -272 -1616
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    WIRE 2960 -1408 2800 -1408
    WIRE -688 -1392 -704 -1392
    WIRE 496 -1392 496 -1456
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    WIRE 1904 -1392 1904 -1600
    WIRE 3088 -1392 3088 -1536
    WIRE 3088 -1392 3024 -1392
    WIRE 3152 -1392 3088 -1392
    WIRE -1680 -1376 -1680 -2016
    WIRE -1584 -1376 -1680 -1376
    WIRE -992 -1376 -1296 -1376
    WIRE 2960 -1376 2800 -1376
    WIRE 144 -1360 144 -1456
    WIRE 256 -1360 144 -1360
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    WIRE 368 -1360 320 -1360
    WIRE -992 -1344 -992 -1376
    WIRE -432 -1344 -992 -1344
    WIRE 64 -1344 64 -1520
    WIRE 64 -1344 -352 -1344
    WIRE 2000 -1344 2000 -1568
    WIRE -1680 -1328 -1680 -1376
    WIRE 64 -1328 64 -1344
    WIRE 368 -1312 368 -1360
    WIRE 3152 -1312 3152 -1392
    WIRE -1520 -1296 -1520 -1328
    WIRE -1440 -1296 -1520 -1296
    WIRE -1360 -1296 -1360 -1328
    WIRE -1360 -1296 -1440 -1296
    WIRE -992 -1280 -992 -1344
    WIRE 2288 -1264 2288 -1376
    WIRE 2384 -1264 2288 -1264
    WIRE 576 -1232 576 -1776
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    WIRE -736 -1216 -848 -1216
    WIRE -704 -1216 -704 -1392
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    TEXT -2232 -1200 Left 2 !.MODEL BAS70L D \n+ IS = 3.22E-9 \n+ N = 1.018 \n+ BV = 77 \n+ IBV = 1.67E-7 \n+ RS = 20.89 \n+ CJO =
    1.608E-12 \n+ VJ = 0.3891 \n+ M = 0.3683 \n+ FC = 0.5 \n+ EG = 0.69 \n+ XTI = 2 \n
    TEXT -336 -528 Left 2 ;\\;R2 a,b,c, Vishay Beschlag ACAS06S0830372P1AT precision 10k resistor \n at R1a, R1b \\Maxim
    MAX5492LB10000+T 10K resistive divider in a SOT-23-5 package
    TEXT -720 -464 Left 2 !.MODEL MMBF4391 NJF VTO=-4.6 BETA=0.02779 LAMBDA=0.00595 RD=1 RS=1 IS=1e-14 CGD=14p CGS=10.5p PB=1 B=1
    KF=1e-18 AF=1 FC=0.5 mfg=Motorola
    TEXT -1112 -464 Left 2 !.tran 0 10s 0s startup


    That circuit is of the category known as "component rich."

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to sunaecoNoChoppedPork@gmail.com on Tue Jan 21 18:29:22 2025
    "JM" <sunaecoNoChoppedPork@gmail.com> wrote in message news:7990pjtghjuo5n489p7so2vnsicvpvr6ms@4ax.com...
    On Tue, 21 Jan 2025 14:52:03 -0500, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@glen--canyon.com> wrote in message news:uitvojh0a603a326e46go11qqcc1o1sv3p@4ax.com...
    On Tue, 21 Jan 2025 11:58:15 -0500, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vmogqg$23tl$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmninh$3t6oi$1@dont-email.me...
    On 21/01/2025 2:19 am, Bill Sloman wrote:
    On 15/01/2025 11:33 pm, Bill Sloman wrote:

    ...


    That circuit is of the category known as "component rich."

    What simulation speed do you get?

    It runs at about 25ms (simulation time) per second real time.

    In that case I don't get why I'm seeing 25us/s and it takes three minutes to report 0.1% done. Core i7 3.6 GHz Windows 10







    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Bill Sloman@21:1/5 to john larkin on Wed Jan 22 11:31:58 2025
    On 22/01/2025 7:09 am, john larkin wrote:
    On Tue, 21 Jan 2025 14:52:03 -0500, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@glen--canyon.com> wrote in message news:uitvojh0a603a326e46go11qqcc1o1sv3p@4ax.com...
    On Tue, 21 Jan 2025 11:58:15 -0500, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vmogqg$23tl$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmninh$3t6oi$1@dont-email.me...
    On 21/01/2025 2:19 am, Bill Sloman wrote:
    On 15/01/2025 11:33 pm, Bill Sloman wrote:

    ...


    That circuit is of the category known as "component rich."

    What simulation speed do you get?

    That's too repulsive to sumulate.

    Not a widely shared opinion.

    A super-low distortion oscillator would be interesting, but a few
    fundamental issues would need to be addressed first.

    Jim Williams published one years ago - it's covered in one of his Linear Technology application notes.

    I'd expect that a 1 PPM THD, variable fequency sine generator
    shouldn't be too difficult, but how would you measure it?

    It isn't. One art per million puts the harmonic content about 120dB
    below the fundamental, and a few people claim to have done better.

    Spectrum analysers and Fourier transform analysis can pull out that
    level of harmonic content - as you really ought to know.

    --
    Bill Sloman, Sydney

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Bill Sloman on Tue Jan 21 20:47:26 2025
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmphrt$ho2r$1@dont-email.me...
    On 22/01/2025 3:58 am, Edward Rawde wrote:
    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vmogqg$23tl$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmninh$3t6oi$1@dont-email.me...
    On 21/01/2025 2:19 am, Bill Sloman wrote:
    On 15/01/2025 11:33 pm, Bill Sloman wrote:

    Copy text from Version 4 to end of file directly from previous post.
    Paste into new asc file using Notepad++
    Note three line wraps near end of file with lines starting with 1.608E-12, MAX5492 and KF=1e-18
    Position cursor at beginning of wrapped part and use backspace key to unwrap it.
    Save file with no other changes. Schematic opens in LTSpice with no issues. >> Start simulation and click on Vout. Note simulation speed of about 20us/s
    Copy file to other computer running LTSpice 24.1.0
    Schematic opens without issues.
    Attempt to start simulation.
    Log file opens with errors claiming issues with U1 - U10. BAS70L is not mentioned.
    Close LTSpice.
    Edit asc file with Notepad++ to remove only .ENDS (note that includes the dot) from BAS70L line. Save file.
    Start simulation. Simulation runs at about 25us/s with no errors.
    Stop simulation.
    Note that log file opens claiming Simulation Failed when really it was just stopped. 24.0.12 doesn't do that.
    Examine schematic more closely.
    Find tiny extraneous piece of wire between R12/R28 and R10/C11. Remove it. >> Cannot find any other schematic issues. U1 and everything else looks as intended to me.
    Simulation still 25us/s
    Post schematic file below as it is now on 24.1.0

    I copied and pasted your file, and - after I'd sorted out the line wraps - turning off "Line Wrap" in Notepad made that a lot
    easier, which was very useful advice - it run painlessly at about 25msec/sec.

    It is running on LTSpice 17.0 on Windows 7, and I do have to download 17.1, which I'm going to do right now.

    Ok I'm going to try a fresh installation of 24.1.0 on a machine which has never had LTSpice on it before.


    --
    Bill Sloman, Sydney

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Bill Sloman@21:1/5 to Edward Rawde on Wed Jan 22 12:32:40 2025
    On 22/01/2025 3:58 am, Edward Rawde wrote:
    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vmogqg$23tl$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmninh$3t6oi$1@dont-email.me...
    On 21/01/2025 2:19 am, Bill Sloman wrote:
    On 15/01/2025 11:33 pm, Bill Sloman wrote:

    Copy text from Version 4 to end of file directly from previous post.
    Paste into new asc file using Notepad++
    Note three line wraps near end of file with lines starting with 1.608E-12, MAX5492 and KF=1e-18
    Position cursor at beginning of wrapped part and use backspace key to unwrap it.
    Save file with no other changes. Schematic opens in LTSpice with no issues. Start simulation and click on Vout. Note simulation speed of about 20us/s Copy file to other computer running LTSpice 24.1.0
    Schematic opens without issues.
    Attempt to start simulation.
    Log file opens with errors claiming issues with U1 - U10. BAS70L is not mentioned.
    Close LTSpice.
    Edit asc file with Notepad++ to remove only .ENDS (note that includes the dot) from BAS70L line. Save file.
    Start simulation. Simulation runs at about 25us/s with no errors.
    Stop simulation.
    Note that log file opens claiming Simulation Failed when really it was just stopped. 24.0.12 doesn't do that.
    Examine schematic more closely.
    Find tiny extraneous piece of wire between R12/R28 and R10/C11. Remove it. Cannot find any other schematic issues. U1 and everything else looks as intended to me.
    Simulation still 25us/s
    Post schematic file below as it is now on 24.1.0

    I copied and pasted your file, and - after I'd sorted out the line wraps
    - turning off "Line Wrap" in Notepad made that a lot easier, which was
    very useful advice - it run painlessly at about 25msec/sec.

    It is running on LTSpice 17.0 on Windows 7, and I do have to download
    17.1, which I'm going to do right now.

    --
    Bill Sloman, Sydney

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Bill Sloman@21:1/5 to Bill Sloman on Wed Jan 22 12:55:38 2025
    On 22/01/2025 12:32 pm, Bill Sloman wrote:
    On 22/01/2025 3:58 am, Edward Rawde wrote:
    "Edward Rawde" <invalid@invalid.invalid> wrote in message
    news:vmogqg$23tl$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message
    news:vmninh$3t6oi$1@dont-email.me...
    On 21/01/2025 2:19 am, Bill Sloman wrote:
    On 15/01/2025 11:33 pm, Bill Sloman wrote:

    <snip>

    It is running on LTSpice 17.0 on Windows 7, and I do have to download
    17.1, which I'm going to do right now.

    What you get if you are running Windows 7 is version 17.0.36.0, which
    may explain the difference. The sim runs just as fast on the newly
    uploaded software. It's unlikely that John May has stuck to Window 7.
    and he has reported here that he is getting the same kind of speed.

    Don posted much the same observation earlier.

    --
    Bill Sloman, Sydney

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Bill Sloman on Wed Jan 22 18:56:19 2025
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmpj6v$i521$1@dont-email.me...
    On 22/01/2025 12:32 pm, Bill Sloman wrote:
    On 22/01/2025 3:58 am, Edward Rawde wrote:
    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vmogqg$23tl$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmninh$3t6oi$1@dont-email.me...
    On 21/01/2025 2:19 am, Bill Sloman wrote:
    On 15/01/2025 11:33 pm, Bill Sloman wrote:

    <snip>

    It is running on LTSpice 17.0 on Windows 7, and I do have to download 17.1, which I'm going to do right now.

    What you get if you are running Windows 7 is version 17.0.36.0, which may explain the difference. The sim runs just as fast on the
    newly uploaded software. It's unlikely that John May has stuck to Window 7. and he has reported here that he is getting the same
    kind of speed.

    Don posted much the same observation earlier.

    I put LTSpice XVII(X64) (17.0.34.0) in the administrator account of an older core i5 2.8GHz (not SSD) running Windows 11 home 23H2.
    I'll be upgrading it to Windows 10 pro when I get a chance.
    I didn't install any suggested LTSpice updates.
    U1 was out of position but this time I had to move it up and connect the -ve power rail.
    Simulation speed varies between about 6ms/s and 15 ms/s.
    Vout shows a single transient at startup which peaks at about 600mv pk and settles to a constant level of around 100mV pk in a few
    hundred ms.
    FFT of a sample of about 100ms near 10s with Blackman Harris window shows 1kHz a little below -20dB,
    2kHz -90dB (so at least 70 dB down on 1 kHz)
    3kHz -70dB
    4kHz -85dB
    5kHz -75dB
    There are no higher peaks or crud at higher frequencies.
    The raw file didn't go above 1.1 GB

    Now move exactly the same circuit to LTSpice 24.1.0 on a core i7 SSD Windows 10 pro 22H2.
    LTSpice component updates available today 22 Jan 2025 were also installed.
    U1 now has to be moved down and the +ve rail has to be connected.
    Note that after saving the file in 24.1.0 the version at the top of the file becomes 4.1
    Take a sample of about 10us of Vout between 300-350us and do FFT with Blackman-Harris window.
    This shows a peak of -43dB at 24MHz and the next highest peak -93dB at 400MHz. Zoom to fit and watch progress. Reported speed is about 25us/s.
    Leave simulation running and do some other work.
    Come back after an hour and find it has peaked at 600mV pk after 86ms simulation time and is now falling.
    Take a sample of a few cycles at 86ms and run FFT with Blackman-Harris window. 1kHz -9dB
    2kHz -95dB
    3kHz -85dB
    4kHz -110dB
    24MHz -63dB
    raw file has reached 40GB and simulation time is now 130ms. Level is 200mv pk and still falling
    Level seems reasonably stable (100mv pk) at 220ms but take a sample and you can see it has parasitic HF crud in it.
    raw file has now reached 74GB. Stop simulation.

    All signal amplitude levels given are pk. pk-pk would be twice.

    To avoid any doubt of what I'm simulating, it's below.

    Version 4.1
    SHEET 1 3608 920
    WIRE -1680 -2400 -1984 -2400
    WIRE -1360 -2400 -1680 -2400
    WIRE -1200 -2400 -1360 -2400
    WIRE -1104 -2400 -1200 -2400
    WIRE -736 -2400 -1104 -2400
    WIRE -320 -2400 -736 -2400
    WIRE 208 -2400 -320 -2400
    WIRE 336 -2400 208 -2400
    WIRE 576 -2400 336 -2400
    WIRE -736 -2384 -736 -2400
    WIRE 208 -2384 208 -2400
    WIRE -320 -2368 -320 -2400
    WIRE 3376 -2272 -1616 -2272
    WIRE 880 -2192 -1776 -2192
    WIRE -1360 -2160 -1360 -2400
    WIRE -736 -2160 -736 -2320
    WIRE -656 -2160 -736 -2160
    WIRE -320 -2160 -320 -2304
    WIRE -176 -2160 -320 -2160
    WIRE 208 -2144 208 -2320
    WIRE 336 -2144 208 -2144
    WIRE -1200 -2112 -1200 -2400
    WIRE -1680 -2096 -1680 -2400
    WIRE -1360 -2048 -1360 -2080
    WIRE -320 -2000 -320 -2160
    WIRE -736 -1984 -736 -2160
    WIRE -1776 -1968 -1776 -2192
    WIRE 336 -1968 336 -2144
    WIRE 576 -1968 576 -2400
    WIRE -1360 -1920 -1360 -1968
    WIRE -1200 -1920 -1200 -2032
    WIRE 1952 -1920 1744 -1920
    WIRE 2160 -1920 1952 -1920
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    WIRE 1376 -1904 1072 -1904
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    WIRE 576 -1776 576 -1904
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    WIRE 2160 -1776 2160 -1824
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    WIRE -32 -1712 -32 -1808
    WIRE -32 -1712 -64 -1712
    WIRE 2432 -1712 2432 -1776
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    WIRE -2016 -1696 -2064 -1696
    WIRE -1840 -1680 -1952 -1680
    WIRE -2016 -1664 -2064 -1664
    WIRE 1648 -1648 1392 -1648
    WIRE 2064 -1648 1648 -1648
    WIRE -912 -1632 -912 -1792
    WIRE -848 -1632 -912 -1632
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    WIRE -1072 -1616 -1200 -1616
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    WIRE -912 -1616 -992 -1616
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    WIRE 2032 -1600 1904 -1600
    WIRE -2064 -1584 -2064 -1664
    WIRE -544 -1584 -544 -1632
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    WIRE -272 -1584 -272 -1616
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    WIRE 1232 -1440 1232 -1584
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    WIRE -912 -1424 -912 -1616
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    WIRE 1904 -1392 1904 -1600
    WIRE 3088 -1392 3088 -1536
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    WIRE 3152 -1392 3088 -1392
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    WIRE 2960 -1376 2800 -1376
    WIRE 144 -1360 144 -1456
    WIRE 256 -1360 144 -1360
    WIRE 368 -1360 368 -1456
    WIRE 368 -1360 320 -1360
    WIRE -992 -1344 -992 -1376
    WIRE -432 -1344 -992 -1344
    WIRE 64 -1344 64 -1520
    WIRE 64 -1344 -352 -1344
    WIRE 2000 -1344 2000 -1568
    WIRE -1680 -1328 -1680 -1376
    WIRE 64 -1328 64 -1344
    WIRE 368 -1312 368 -1360
    WIRE 3152 -1312 3152 -1392
    WIRE -1520 -1296 -1520 -1328
    WIRE -1440 -1296 -1520 -1296
    WIRE -1360 -1296 -1360 -1328
    WIRE -1360 -1296 -1440 -1296
    WIRE -992 -1280 -992 -1344
    WIRE 2288 -1264 2288 -1376
    WIRE 2384 -1264 2288 -1264
    WIRE 576 -1232 576 -1776
    WIRE -736 -1216 -736 -1920
    WIRE -736 -1216 -848 -1216
    WIRE -704 -1216 -704 -1392
    WIRE -704 -1216 -736 -1216
    WIRE -560 -1216 -704 -1216
    WIRE -320 -1216 -320 -1936
    WIRE -320 -1216 -560 -1216
    WIRE 208 -1216 208 -2144
    WIRE 432 -1216 432 -1520
    WIRE 496 -1216 496 -1312
    WIRE 496 -1216 432 -1216
    WIRE 544 -1216 496 -1216
    WIRE -1440 -1200 -1440 -1296
    WIRE 64 -1200 64 -1248
    WIRE 144 -1200 144 -1360
    WIRE 144 -1200 64 -1200
    WIRE 176 -1200 144 -1200
    WIRE 880 -1200 880 -1552
    WIRE 880 -1200 608 -1200
    WIRE 368 -1184 368 -1248
    WIRE 368 -1184 240 -1184
    WIRE 544 -1184 464 -1184
    WIRE 2288 -1184 2288 -1264
    WIRE -320 -1168 -320 -1216
    WIRE -48 -1168 -144 -1168
    WIRE 176 -1168 -48 -1168
    WIRE 1232 -1168 1232 -1360
    WIRE 1328 -1168 1328 -1328
    WIRE 1328 -1168 1232 -1168
    WIRE 1520 -1168 1328 -1168
    WIRE 1904 -1168 1904 -1312
    WIRE 1904 -1168 1520 -1168
    WIRE 2000 -1168 2000 -1280
    WIRE 2000 -1168 1904 -1168
    WIRE -1776 -1152 -1776 -1632
    WIRE -1504 -1152 -1776 -1152
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    WIRE -560 -1152 -560 -1216
    WIRE 464 -1152 464 -1184
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    WIRE 2384 -1152 2384 -1264
    WIRE 2416 -1152 2384 -1152
    WIRE 2752 -1152 2704 -1152
    WIRE 2800 -1152 2800 -1376
    WIRE 2800 -1152 2752 -1152
    WIRE -144 -1136 -144 -1168
    WIRE -48 -1136 -48 -1168
    WIRE 2800 -1120 2800 -1152
    WIRE -1104 -1104 -1104 -2400
    WIRE 368 -1088 368 -1184
    WIRE 2384 -1088 2384 -1152
    WIRE 2416 -1088 2384 -1088
    WIRE 2752 -1088 2752 -1152
    WIRE 2752 -1088 2704 -1088
    WIRE -1440 -1072 -1440 -1104
    WIRE -1440 -1072 -1568 -1072
    WIRE 432 -1072 432 -1216
    WIRE 640 -1072 432 -1072
    WIRE 880 -1072 880 -1200
    WIRE 880 -1072 704 -1072
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    WIRE -144 -1040 -144 -1072
    WIRE -80 -1040 -144 -1040
    WIRE -48 -1040 -48 -1056
    WIRE -48 -1040 -80 -1040
    WIRE 3152 -1040 3152 -1232
    WIRE 3232 -1040 3152 -1040
    WIRE -48 -1024 -48 -1040
    WIRE 3376 -1024 3376 -2272
    WIRE 3376 -1024 3296 -1024
    WIRE -1776 -1008 -1776 -1152
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    WIRE 368 -944 160 -944
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    FLAG 464 -1152 0
    FLAG -48 -1024 0
    FLAG -1264 -992 0
    FLAG 336 -2400 Vcc
    FLAG 416 -624 Vee
    FLAG -560 -1152 0
    FLAG 16 -1520 Vout
    FLAG 2576 -960 0
    FLAG 2432 -1456 Vcc
    FLAG -1040 -704 Vee
    FLAG -288 -1456 0
    FLAG 336 -1888 0
    FLAG 1376 -1904 filt1
    FLAG 1648 -1648 Vcc
    FLAG 1632 -1456 Vee
    FLAG 1520 -1152 0
    FLAG 1952 -1920 filter2
    FLAG 2432 -1584 0
    FLAG -2064 -1584 0
    SYMBOL Opamps\\LT1360 208 -1184 R0
    SYMATTR InstName U1
    SYMBOL res 48 -1344 R0
    WINDOW 0 41 37 Left 2
    WINDOW 3 36 71 Left 2
    SYMATTR InstName R1
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res -64 -1152 R0
    WINDOW 3 41 74 Left 2
    WINDOW 0 43 31 Left 2
    SYMATTR Value 4k02
    SYMATTR InstName R2
    SYMATTR SpiceLine tol=1
    SYMBOL cap -160 -1136 R0
    SYMATTR InstName C1
    SYMATTR Value 3.3n
    SYMBOL schottky 352 -1312 R0
    WINDOW 3 -89 62 Left 2
    WINDOW 0 -92 37 Left 2
    SYMATTR Value BAS70L
    SYMATTR InstName D1
    SYMBOL schottky 352 -1088 R0
    WINDOW 3 -78 61 Left 2
    WINDOW 0 -81 40 Left 2
    SYMATTR Value BAS70L
    SYMATTR InstName D2
    SYMBOL res 352 -1472 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R1a
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res 208 -1536 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R3
    SYMATTR Value 20k
    SYMATTR SpiceLine tol=1
    SYMBOL res 480 -1408 R0
    WINDOW 0 41 41 Left 2
    WINDOW 3 34 79 Left 2
    SYMATTR InstName R2a
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res 560 -928 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R2b
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res 720 -928 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R2c
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL cap 160 -960 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C4
    SYMATTR Value 3.3p
    SYMBOL res 48 -896 R0
    WINDOW 0 39 33 Left 2
    WINDOW 3 40 74 Left 2
    SYMATTR InstName R1b
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL voltage -1104 -1120 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    SYMATTR InstName V1
    SYMATTR Value 12
    SYMBOL voltage -1104 -976 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    SYMATTR InstName V2
    SYMATTR Value 12
    SYMBOL cap -448 -1600 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C5
    SYMATTR Value 15n
    SYMATTR SpiceLine V=63 Rser=4 Lser=12n
    SYMBOL res -448 -1568 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R4
    SYMATTR Value 10.7k
    SYMATTR SpiceLine tol=1
    SYMBOL cap -64 -1728 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C6
    SYMATTR Value 15n
    SYMATTR SpiceLine V=63 Rser=4 Lser=12n
    SYMBOL cap 3104 -1664 R180
    WINDOW 0 24 64 Left 2
    WINDOW 3 24 8 Left 2
    SYMATTR InstName C8
    SYMATTR Value 22n
    SYMBOL res 2848 -1760 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R10
    SYMATTR Value 220k
    SYMBOL Opamps\\LT1056A 2992 -1456 R0
    SYMATTR InstName U5
    SYMBOL cap 2784 -1120 R0
    SYMATTR InstName C10
    SYMATTR Value 3.3µ
    SYMBOL cap 2912 -1552 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C11
    SYMATTR Value 3.3p
    SYMBOL Opamps\\OP27 576 -1264 R0
    SYMATTR InstName U2
    SYMBOL FerriteBead 576 -672 R0
    SYMATTR InstName L2
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 752 -1408 R0
    SYMATTR InstName C15
    SYMATTR Value 100n
    SYMBOL cap 752 -800 R0
    SYMATTR InstName C16
    SYMATTR Value 100n
    SYMBOL FerriteBead -176 -928 R0
    SYMATTR InstName L4
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap -336 -2000 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C17
    SYMATTR Value 100n
    SYMBOL cap -336 -1168 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C18
    SYMATTR Value 100n
    SYMBOL cap 2272 -1184 R0
    SYMATTR InstName C21
    SYMATTR Value 100n
    SYMBOL FerriteBead 2288 -1408 R0
    SYMATTR InstName L7
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL res -480 -1888 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R22
    SYMATTR Value 2.49k
    SYMATTR SpiceLine tol=1
    SYMBOL FerriteBead -320 -2336 R0
    SYMATTR InstName L8
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap -752 -1984 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C7
    SYMATTR Value 100n
    SYMBOL FerriteBead -736 -2352 R0
    SYMATTR InstName L3
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL FerriteBead -656 -896 R0
    SYMATTR InstName L9
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap -864 -1152 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C23
    SYMATTR Value 100n
    SYMBOL res -160 -1600 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R26
    SYMATTR Value 10.7k
    SYMATTR SpiceLine tol=1
    SYMBOL res -768 -1808 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R5
    SYMATTR Value 4.99k
    SYMATTR SpiceLine tol=1
    SYMBOL cap -784 -1648 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C19
    SYMATTR Value 10p
    SYMBOL FerriteBead 208 -672 R0
    SYMATTR InstName L5
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL FerriteBead 208 -2352 R0
    SYMATTR InstName L6
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 320 -1968 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C20
    SYMATTR Value 100n
    SYMBOL cap -96 -816 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C22
    SYMATTR Value 100n
    SYMBOL References\\LTC6655-1.25 2560 -1120 R0
    SYMATTR InstName U4
    SYMBOL cap -64 -1824 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C9
    SYMATTR Value 10p
    SYMBOL FerriteBead 576 -1936 R0
    SYMATTR InstName L13
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 704 -1088 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C13
    SYMATTR Value 10p
    SYMBOL res 2592 -1792 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R12
    SYMATTR Value 137k
    SYMBOL res 1376 -1776 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R8
    SYMATTR Value 14k
    SYMBOL res 1216 -1456 R0
    SYMATTR InstName R13
    SYMATTR Value 56k
    SYMBOL cap 1312 -1392 R0
    SYMATTR InstName C3
    SYMATTR Value 18n
    SYMBOL cap 1056 -1856 R0
    SYMATTR InstName C12
    SYMATTR Value 18n
    SYMBOL res 1216 -1568 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R14
    SYMATTR Value 14k
    SYMBOL Opamps\\LT1013 1392 -1632 R0
    SYMATTR InstName U6
    SYMBOL res 896 -1536 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R15
    SYMATTR Value 18.7k
    SYMBOL res 2048 -1840 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R16
    SYMATTR Value 14k
    SYMBOL cap 1728 -1872 R0
    SYMATTR InstName C14
    SYMATTR Value 18n
    SYMBOL res 1888 -1584 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R17
    SYMATTR Value 14k
    SYMBOL Opamps\\LT1013 2064 -1648 R0
    SYMATTR InstName U7
    SYMBOL res 1568 -1552 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R18
    SYMATTR Value 18.7k
    SYMBOL res 1888 -1408 R0
    SYMATTR InstName R19
    SYMATTR Value 56k
    SYMBOL cap 1984 -1344 R0
    SYMATTR InstName C24
    SYMATTR Value 18n
    SYMBOL npn -1504 -1008 R0
    SYMATTR InstName Q1
    SYMATTR Value 2N5089
    SYMBOL npn -1712 -1008 M0
    SYMATTR InstName Q2
    SYMATTR Value 2N5089
    SYMBOL res 2384 -1792 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R9
    SYMATTR Value 17k
    SYMBOL res 2416 -1728 R0
    SYMATTR InstName R28
    SYMATTR Value 68k
    SYMBOL Opamps\\LT1115 -656 -1472 R0
    SYMATTR InstName U3
    SYMBOL Opamps\\LT1115 -176 -1584 R0
    SYMATTR InstName U8
    SYMBOL cap 320 -1376 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C2
    SYMATTR Value 3.3p
    SYMBOL res -1792 -848 R0
    SYMATTR InstName R7
    SYMATTR Value 68
    SYMBOL pnp -1840 -1632 M180
    WINDOW 3 84 0 Left 2
    SYMATTR Value 2N5087
    SYMATTR InstName Q3
    SYMBOL res -1792 -1984 R0
    SYMATTR InstName R11
    SYMATTR Value 270k
    SYMBOL res -1632 -1920 R0
    SYMATTR InstName R21
    SYMATTR Value 47k
    SYMBOL pnp -1296 -1824 R180
    WINDOW 3 84 0 Left 2
    SYMATTR Value 2N5087
    SYMATTR InstName Q7
    SYMBOL pnp -1264 -1824 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q8
    SYMATTR Value 2N5087
    SYMBOL res -448 -1328 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R23
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=1
    SYMBOL res -1376 -2176 R0
    SYMATTR InstName R6
    SYMATTR Value 1.5k
    SYMBOL res -1216 -2128 R0
    SYMATTR InstName R24
    SYMATTR Value 1.5k
    SYMBOL pnp -1264 -1680 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q9
    SYMATTR Value 2N5087
    SYMBOL npn -1504 -1200 R0
    SYMATTR InstName Q10
    SYMATTR Value 2N5089
    SYMBOL res -1376 -2064 R0
    SYMATTR InstName R27
    SYMATTR Value 6.2
    SYMBOL Opamps\\LT1013 -1984 -1744 R0
    SYMATTR InstName U9
    SYMBOL res -560 -1744 R0
    SYMATTR InstName R20
    SYMATTR Value 120
    SYMBOL Opamps\\LT1056A 3264 -1088 R0
    SYMATTR InstName U10
    SYMBOL res 3136 -1328 R0
    SYMATTR InstName R25
    SYMATTR Value 10k
    SYMBOL res 3136 -944 R0
    SYMATTR InstName R29
    SYMATTR Value 10k
    SYMBOL res -976 -1632 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R30
    SYMATTR Value 1
    SYMATTR SpiceLine tol=1
    SYMBOL res -1008 -1296 R0
    SYMATTR InstName R31
    SYMATTR Value 20k
    SYMBOL res -1696 -2112 R0
    SYMATTR InstName R32
    SYMATTR Value 36k
    SYMATTR SpiceLine tol=1
    SYMBOL res -1696 -1344 R0
    SYMATTR InstName R33
    SYMATTR Value 18k
    SYMBOL npn -1584 -1424 R0
    SYMATTR InstName Q5
    SYMATTR Value 2N5089
    SYMBOL npn -1296 -1424 M0
    SYMATTR InstName Q6
    SYMATTR Value 2N5089
    TEXT -2232 -1200 Left 2 !.MODEL BAS70L D \n+ IS = 3.22E-9 \n+ N = 1.018 \n+ BV = 77 \n+ IBV = 1.67E-7 \n+ RS = 20.89 \n+ CJO =
    1.608E-12 \n+ VJ = 0.3891 \n+ M = 0.3683 \n+ FC = 0.5 \n+ EG = 0.69 \n+ XTI = 2 \n
    TEXT -336 -528 Left 2 ;\\;R2 a,b,c, Vishay Beschlag ACAS06S0830372P1AT precision 10k resistor \n at R1a, R1b \\Maxim
    MAX5492LB10000+T 10K resistive divider in a SOT-23-5 package
    TEXT -720 -464 Left 2 !.MODEL MMBF4391 NJF VTO=-4.6 BETA=0.02779 LAMBDA=0.00595 RD=1 RS=1 IS=1e-14 CGD=14p CGS=10.5p PB=1 B=1
    KF=1e-18 AF=1 FC=0.5 mfg=Motorola
    TEXT -1112 -464 Left 2 !.tran 0 10s 0s startup

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Bill Sloman@21:1/5 to Edward Rawde on Thu Jan 23 17:39:38 2025
    On 23/01/2025 10:56 am, Edward Rawde wrote:
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmpj6v$i521$1@dont-email.me...
    On 22/01/2025 12:32 pm, Bill Sloman wrote:
    On 22/01/2025 3:58 am, Edward Rawde wrote:
    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vmogqg$23tl$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmninh$3t6oi$1@dont-email.me...
    On 21/01/2025 2:19 am, Bill Sloman wrote:
    On 15/01/2025 11:33 pm, Bill Sloman wrote:

    <snip>

    It is running on LTSpice 17.0 on Windows 7, and I do have to download 17.1, which I'm going to do right now.

    What you get if you are running Windows 7 is version 17.0.36.0, which may explain the difference. The sim runs just as fast on the
    newly uploaded software. It's unlikely that John May has stuck to Window 7. and he has reported here that he is getting the same
    kind of speed.

    Don posted much the same observation earlier.

    I put LTSpice XVII(X64) (17.0.34.0) in the administrator account of an older core i5 2.8GHz (not SSD) running Windows 11 home 23H2.
    I'll be upgrading it to Windows 10 pro when I get a chance.
    I didn't install any suggested LTSpice updates.
    U1 was out of position but this time I had to move it up and connect the -ve power rail.
    Simulation speed varies between about 6ms/s and 15 ms/s.
    Vout shows a single transient at startup which peaks at about 600mv pk and settles to a constant level of around 100mV pk in a few
    hundred ms.
    FFT of a sample of about 100ms near 10s with Blackman Harris window shows 1kHz a little below -20dB,
    2kHz -90dB (so at least 70 dB down on 1 kHz)
    3kHz -70dB
    4kHz -85dB
    5kHz -75dB
    There are no higher peaks or crud at higher frequencies.
    The raw file didn't go above 1.1 GB

    Now move exactly the same circuit to LTSpice 24.1.0 on a core i7 SSD Windows 10 pro 22H2.
    LTSpice component updates available today 22 Jan 2025 were also installed.
    U1 now has to be moved down and the +ve rail has to be connected.
    Note that after saving the file in 24.1.0 the version at the top of the file becomes 4.1
    Take a sample of about 10us of Vout between 300-350us and do FFT with Blackman-Harris window.
    This shows a peak of -43dB at 24MHz and the next highest peak -93dB at 400MHz.
    Zoom to fit and watch progress. Reported speed is about 25us/s.
    Leave simulation running and do some other work.
    Come back after an hour and find it has peaked at 600mV pk after 86ms simulation time and is now falling.
    Take a sample of a few cycles at 86ms and run FFT with Blackman-Harris window.
    1kHz -9dB
    2kHz -95dB
    3kHz -85dB
    4kHz -110dB
    24MHz -63dB
    raw file has reached 40GB and simulation time is now 130ms. Level is 200mv pk and still falling
    Level seems reasonably stable (100mv pk) at 220ms but take a sample and you can see it has parasitic HF crud in it.
    raw file has now reached 74GB. Stop simulation.

    All signal amplitude levels given are pk. pk-pk would be twice.

    To avoid any doubt of what I'm simulating, it's below.

    And the problem with your version of the circuit is that C10 on the
    output of U4 was 3.3? rather than 3.3u, We've had that problem before.

    The LTC6655-1.25 at U1 is an an excellent voltage reference if it is
    loaded with at least 2.7uF. Technically speaking I should be using the
    Greek symbol. Using 3300nF is safer, because not every LTSpice user
    takes advantage of the option to treat "u" as if was the correct Greek
    alphabet look-alike.

    Without enough output capacitance the LTSpice model for the LTC6655-1.25 behaves oddly. I screwed up early on and only used 1uF and the part
    oscillated.

    In your version of the circuit it presents a slowly rising ramp starting
    at 0V which had crept up to 10mV after 2 seconds.

    This doesn't produce the behaviour I intended.

    There's also a problem with the BAS70L diode model - your version leaves
    off the .ENDS line at the end of the Spice directive. The simulation
    appears to run fine without it, at 30msec/sec, but I'm still nervous
    about it.

    --
    Bill Sloman, Sydney

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Bill Sloman on Thu Jan 23 13:18:10 2025
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmso7m$1gtf6$1@dont-email.me...
    On 23/01/2025 10:56 am, Edward Rawde wrote:
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmpj6v$i521$1@dont-email.me...
    On 22/01/2025 12:32 pm, Bill Sloman wrote:
    On 22/01/2025 3:58 am, Edward Rawde wrote:
    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:vmogqg$23tl$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:vmninh$3t6oi$1@dont-email.me...
    On 21/01/2025 2:19 am, Bill Sloman wrote:
    On 15/01/2025 11:33 pm, Bill Sloman wrote:

    <snip>

    It is running on LTSpice 17.0 on Windows 7, and I do have to download 17.1, which I'm going to do right now.

    What you get if you are running Windows 7 is version 17.0.36.0, which may explain the difference. The sim runs just as fast on
    the
    newly uploaded software. It's unlikely that John May has stuck to Window 7. and he has reported here that he is getting the same
    kind of speed.

    Don posted much the same observation earlier.

    I put LTSpice XVII(X64) (17.0.34.0) in the administrator account of an older core i5 2.8GHz (not SSD) running Windows 11 home
    23H2.
    I'll be upgrading it to Windows 10 pro when I get a chance.
    I didn't install any suggested LTSpice updates.
    U1 was out of position but this time I had to move it up and connect the -ve power rail.
    Simulation speed varies between about 6ms/s and 15 ms/s.
    Vout shows a single transient at startup which peaks at about 600mv pk and settles to a constant level of around 100mV pk in a
    few
    hundred ms.
    FFT of a sample of about 100ms near 10s with Blackman Harris window shows 1kHz a little below -20dB,
    2kHz -90dB (so at least 70 dB down on 1 kHz)
    3kHz -70dB
    4kHz -85dB
    5kHz -75dB
    There are no higher peaks or crud at higher frequencies.
    The raw file didn't go above 1.1 GB

    Now move exactly the same circuit to LTSpice 24.1.0 on a core i7 SSD Windows 10 pro 22H2.
    LTSpice component updates available today 22 Jan 2025 were also installed. >> U1 now has to be moved down and the +ve rail has to be connected.
    Note that after saving the file in 24.1.0 the version at the top of the file becomes 4.1
    Take a sample of about 10us of Vout between 300-350us and do FFT with Blackman-Harris window.
    This shows a peak of -43dB at 24MHz and the next highest peak -93dB at 400MHz.
    Zoom to fit and watch progress. Reported speed is about 25us/s.
    Leave simulation running and do some other work.
    Come back after an hour and find it has peaked at 600mV pk after 86ms simulation time and is now falling.
    Take a sample of a few cycles at 86ms and run FFT with Blackman-Harris window.
    1kHz -9dB
    2kHz -95dB
    3kHz -85dB
    4kHz -110dB
    24MHz -63dB
    raw file has reached 40GB and simulation time is now 130ms. Level is 200mv pk and still falling
    Level seems reasonably stable (100mv pk) at 220ms but take a sample and you can see it has parasitic HF crud in it.
    raw file has now reached 74GB. Stop simulation.

    All signal amplitude levels given are pk. pk-pk would be twice.

    To avoid any doubt of what I'm simulating, it's below.

    And the problem with your version of the circuit is that C10 on the output of U4 was 3.3? rather than 3.3u, We've had that problem
    before.

    Aha for some reason I thought that your circuit didn't have any u symbols.
    It's 3300n now.
    In any case that's easy to fix. Just open the asc file in a real editor (Notepad++)
    Under Encoding, Convert to ANSI and save the file.
    I usually do this with any file obtained online but for some reason I thought that yours had no u symbols.
    There's also an option in LTSpice under Tools, Settings (Control Panel in your case), Netlist Options convert u to u which I haven't
    tested yet.


    The LTC6655-1.25 at U1 is an an excellent voltage reference if it is loaded with at least 2.7uF. Technically speaking I should be
    using the Greek symbol. Using 3300nF is safer, because not every LTSpice user takes advantage of the option to treat "u" as if was
    the correct Greek alphabet look-alike.

    I'll be doing ANSI conversion in Notepad++ every time now.


    Without enough output capacitance the LTSpice model for the LTC6655-1.25 behaves oddly. I screwed up early on and only used 1uF
    and the part oscillated.

    In your version of the circuit it presents a slowly rising ramp starting at 0V which had crept up to 10mV after 2 seconds.

    This doesn't produce the behaviour I intended.

    There's also a problem with the BAS70L diode model - your version leaves off the .ENDS line at the end of the Spice directive. The
    simulation appears to run fine without it, at 30msec/sec, but I'm still nervous about it.

    Removing .ENDS from the BAS70L model doesn't make any difference with versions of LTSpice prior to 24.1.0
    But if it's present when you try to simulate in 24.1.0 you'll get errors which make no sense and don't mention BAS70L.

    Your circuit still includes the MMBF4391 model which doesn't have .ENDS so why should BAS70L care?
    I converted BAS70L to a single line in the circuit below, with no difference in simulation that I can see.
    I've also removed MMBF4391

    So now let's simulate the corrected circuit (included below) in 24.1.0 with all updates and also in 17.0.34.0 with no updates at
    all.

    In 24.1.0 the first thing we see is an 0.6V ramp shaped spike lasting about 2us. This appears to be just a startup transient of no
    consequence.
    The next thing we see is what looks like 24MHz parasitic oscillation at a level of about 10mV pk
    Zooming up shows a sinewave with some clipping between -8mV and +10mV.
    Placing cursors on the trace confirms 24MHz.
    Reported simulation speed doesn't go above 30us/s
    Leave simulation running and copy file to another computer running LTSpice 17.0.34.0

    U1 is displaced downwards so move it up and connect -ve rail.
    Simulation now shows five or six settling transients lasting about 0.7s before the output settles at about 1.8V pk
    Reported simulation speed varies but is mostly between 5 and 12 ms/s
    Allow simulation to run to 10s. Take a sample of about 100ms near 10s and FFT with Blackman-Harris window.
    1kHz 0dB
    2kHz -62dB
    3kHz -50dB
    4kHz -60dB
    5kHz -50dB
    6kHz -63dB
    7kHz -55dB
    8kHz -70dB
    9kHz -60dB
    10kHz -75dB
    Take a sample of a few cycles near 10s. Don't see anything at 24MHz.

    Go back to 24.1.0 simulation.
    It's at about 120ms near the end of the first transient which peaks at 5V.
    Take a sample of a few cycles with amplitude near 2V pk
    1kHz slightly above 0dB
    2kHz -80dB
    3kHz -78dB
    4kHz -100dB
    5kHz -88dB
    6kHz -110dB
    7kHz -95dB
    8kHz -115dB
    9kHz -98dB
    10kHz -115dB
    24MHz -62dB

    Conclusion. The difference between the two simulations has nothing to do with C10 or .ENDS in BAS70L but I'd still like to know what
    it is.

    The circuit below was last saved in 17.0.34.0. Check the position and connection of U1 before simulating.

    Version 4
    SHEET 1 3608 920
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    FLAG -48 -1024 0
    FLAG -1264 -992 0
    FLAG 336 -2400 Vcc
    FLAG 416 -624 Vee
    FLAG -560 -1152 0
    FLAG 16 -1520 Vout
    FLAG 2576 -960 0
    FLAG 2432 -1456 Vcc
    FLAG -1040 -704 Vee
    FLAG -288 -1456 0
    FLAG 336 -1888 0
    FLAG 1376 -1904 filt1
    FLAG 1648 -1648 Vcc
    FLAG 1632 -1456 Vee
    FLAG 1520 -1152 0
    FLAG 1952 -1920 filter2
    FLAG 2432 -1584 0
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    SYMBOL Opamps\\LT1360 208 -1248 R0
    SYMATTR InstName U1
    SYMBOL res 48 -1344 R0
    WINDOW 0 41 37 Left 2
    WINDOW 3 36 71 Left 2
    SYMATTR InstName R1
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL res -64 -1152 R0
    WINDOW 3 41 74 Left 2
    WINDOW 0 43 31 Left 2
    SYMATTR Value 4k02
    SYMATTR InstName R2
    SYMATTR SpiceLine tol=1
    SYMBOL cap -160 -1136 R0
    SYMATTR InstName C1
    SYMATTR Value 3.3n
    SYMBOL schottky 352 -1312 R0
    WINDOW 3 -89 62 Left 2
    WINDOW 0 -92 37 Left 2
    SYMATTR Value BAS70L
    SYMATTR InstName D1
    SYMBOL schottky 352 -1088 R0
    WINDOW 3 -78 61 Left 2
    WINDOW 0 -81 40 Left 2
    SYMATTR Value BAS70L
    SYMATTR InstName D2
    SYMBOL res 352 -1472 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R1a
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
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    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R3
    SYMATTR Value 20k
    SYMATTR SpiceLine tol=1
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    WINDOW 0 41 41 Left 2
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    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
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    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R2b
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
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    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R2c
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL cap 160 -960 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C4
    SYMATTR Value 3.3p
    SYMBOL res 48 -896 R0
    WINDOW 0 39 33 Left 2
    WINDOW 3 40 74 Left 2
    SYMATTR InstName R1b
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=0.1
    SYMBOL voltage -1104 -1120 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    SYMATTR InstName V1
    SYMATTR Value 12
    SYMBOL voltage -1104 -976 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    SYMATTR InstName V2
    SYMATTR Value 12
    SYMBOL cap -448 -1600 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C5
    SYMATTR Value 15n
    SYMATTR SpiceLine V=63 Rser=4 Lser=12n
    SYMBOL res -448 -1568 R270
    WINDOW 0 27 56 VTop 2
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    SYMATTR SpiceLine tol=1
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    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C6
    SYMATTR Value 15n
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    WINDOW 0 24 64 Left 2
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    SYMATTR InstName C8
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    SYMBOL res 2848 -1760 R270
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    SYMATTR InstName R10
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    SYMBOL cap 2912 -1552 R90
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    SYMATTR InstName C11
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    SYMBOL cap 752 -800 R0
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    SYMATTR InstName C17
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    SYMBOL cap -336 -1168 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
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    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
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    SYMATTR SpiceLine tol=1
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    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
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    SYMATTR InstName L9
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap -864 -1152 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C23
    SYMATTR Value 100n
    SYMBOL res -160 -1600 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R26
    SYMATTR Value 10.7k
    SYMATTR SpiceLine tol=1
    SYMBOL res -768 -1808 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R5
    SYMATTR Value 4.99k
    SYMATTR SpiceLine tol=1
    SYMBOL cap -784 -1648 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C19
    SYMATTR Value 10p
    SYMBOL FerriteBead 208 -672 R0
    SYMATTR InstName L5
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL FerriteBead 208 -2352 R0
    SYMATTR InstName L6
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 320 -1968 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C20
    SYMATTR Value 100n
    SYMBOL cap -96 -816 R0
    WINDOW 0 -60 15 Left 2
    WINDOW 3 -62 54 Left 2
    SYMATTR InstName C22
    SYMATTR Value 100n
    SYMBOL References\\LTC6655-1.25 2560 -1120 R0
    SYMATTR InstName U4
    SYMBOL cap -64 -1824 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C9
    SYMATTR Value 10p
    SYMBOL FerriteBead 576 -1936 R0
    SYMATTR InstName L13
    SYMATTR Value 1000n
    SYMATTR SpiceLine Ipk=0.2 Rser=0.562 Rpar=750 Cpar=350f mfg="Würth Elektronik" pn="782422601 WE-CBA 0402"
    SYMBOL cap 704 -1088 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C13
    SYMATTR Value 10p
    SYMBOL res 2592 -1792 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R12
    SYMATTR Value 137k
    SYMBOL res 1376 -1776 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R8
    SYMATTR Value 14k
    SYMBOL res 1216 -1456 R0
    SYMATTR InstName R13
    SYMATTR Value 56k
    SYMBOL cap 1312 -1392 R0
    SYMATTR InstName C3
    SYMATTR Value 18n
    SYMBOL cap 1056 -1856 R0
    SYMATTR InstName C12
    SYMATTR Value 18n
    SYMBOL res 1216 -1568 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R14
    SYMATTR Value 14k
    SYMBOL Opamps\\LT1013 1392 -1632 R0
    SYMATTR InstName U6
    SYMBOL res 896 -1536 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R15
    SYMATTR Value 18.7k
    SYMBOL res 2048 -1840 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R16
    SYMATTR Value 14k
    SYMBOL cap 1728 -1872 R0
    SYMATTR InstName C14
    SYMATTR Value 18n
    SYMBOL res 1888 -1584 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R17
    SYMATTR Value 14k
    SYMBOL Opamps\\LT1013 2064 -1648 R0
    SYMATTR InstName U7
    SYMBOL res 1568 -1552 R270
    WINDOW 0 32 56 VTop 2
    WINDOW 3 0 56 VBottom 2
    SYMATTR InstName R18
    SYMATTR Value 18.7k
    SYMBOL res 1888 -1408 R0
    SYMATTR InstName R19
    SYMATTR Value 56k
    SYMBOL cap 1984 -1344 R0
    SYMATTR InstName C24
    SYMATTR Value 18n
    SYMBOL npn -1504 -1008 R0
    SYMATTR InstName Q1
    SYMATTR Value 2N5089
    SYMBOL npn -1712 -1008 M0
    SYMATTR InstName Q2
    SYMATTR Value 2N5089
    SYMBOL res 2384 -1792 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R9
    SYMATTR Value 17k
    SYMBOL res 2416 -1728 R0
    SYMATTR InstName R28
    SYMATTR Value 68k
    SYMBOL Opamps\\LT1115 -656 -1472 R0
    SYMATTR InstName U3
    SYMBOL Opamps\\LT1115 -176 -1584 R0
    SYMATTR InstName U8
    SYMBOL cap 320 -1376 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C2
    SYMATTR Value 3.3p
    SYMBOL res -1792 -848 R0
    SYMATTR InstName R7
    SYMATTR Value 68
    SYMBOL pnp -1840 -1632 M180
    WINDOW 3 84 0 Left 2
    SYMATTR Value 2N5087
    SYMATTR InstName Q3
    SYMBOL res -1792 -1984 R0
    SYMATTR InstName R11
    SYMATTR Value 270k
    SYMBOL res -1632 -1920 R0
    SYMATTR InstName R21
    SYMATTR Value 47k
    SYMBOL pnp -1296 -1824 R180
    WINDOW 3 84 0 Left 2
    SYMATTR Value 2N5087
    SYMATTR InstName Q7
    SYMBOL pnp -1264 -1824 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q8
    SYMATTR Value 2N5087
    SYMBOL res -448 -1328 R270
    WINDOW 0 27 56 VTop 2
    WINDOW 3 5 56 VBottom 2
    SYMATTR InstName R23
    SYMATTR Value 10k
    SYMATTR SpiceLine tol=1
    SYMBOL res -1376 -2176 R0
    SYMATTR InstName R6
    SYMATTR Value 1.5k
    SYMBOL res -1216 -2128 R0
    SYMATTR InstName R24
    SYMATTR Value 1.5k
    SYMBOL pnp -1264 -1680 M180
    WINDOW 0 57 29 Left 2
    WINDOW 3 60 62 Left 2
    SYMATTR InstName Q9
    SYMATTR Value 2N5087
    SYMBOL npn -1504 -1200 R0
    SYMATTR InstName Q10
    SYMATTR Value 2N5089
    SYMBOL res -1376 -2064 R0
    SYMATTR InstName R27
    SYMATTR Value 6.2
    SYMBOL Opamps\\LT1013 -1984 -1744 R0
    SYMATTR InstName U9
    SYMBOL res -560 -1744 R0
    SYMATTR InstName R20
    SYMATTR Value 120
    SYMBOL Opamps\\LT1056A 3264 -1088 R0
    SYMATTR InstName U10
    SYMBOL res 3136 -1328 R0
    SYMATTR InstName R25
    SYMATTR Value 10k
    SYMBOL res 3136 -944 R0
    SYMATTR InstName R29
    SYMATTR Value 10k
    SYMBOL res -976 -1632 R90
    WINDOW 0 0 56 VBottom 2
    WINDOW 3 32 56 VTop 2
    SYMATTR InstName R30
    SYMATTR Value 1
    SYMATTR SpiceLine tol=1
    SYMBOL res -1008 -1296 R0
    SYMATTR InstName R31
    SYMATTR Value 20k
    SYMBOL res -1696 -2112 R0
    SYMATTR InstName R32
    SYMATTR Value 36k
    SYMATTR SpiceLine tol=1
    SYMBOL res -1696 -1344 R0
    SYMATTR InstName R33
    SYMATTR Value 18k
    SYMBOL npn -1584 -1424 R0
    SYMATTR InstName Q5
    SYMATTR Value 2N5089
    SYMBOL npn -1296 -1424 M0
    SYMATTR InstName Q6
    SYMATTR Value 2N5089
    TEXT -1736 -600 Left 2 !.MODEL BAS70L D IS = 3.22E-9 N = 1.018 BV = 77 IBV = 1.67E-7 RS = 20.89 CJO = 1.608E-12 VJ = 0.3891 M =
    0.3683 FC = 0.5 EG = 0.69 XTI = 2
    TEXT -336 -528 Left 2 ;R2 a,b,c, Vishay Beschlag ACAS06S0830372P1AT precision 10k resistor \n at R1a, R1b Maxim MAX5492LB10000+T
    10K resistive divider in a SOT-23-5 package
    TEXT -1136 -536 Left 2 !.tran 0 10s 0s startup

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