• Fast monostable with a transistpor array

    From Bill Sloman@21:1/5 to All on Fri Jun 14 01:20:10 2024
    One option John Larjkin doesn't seem to have explored is using Renesas
    HFA3096 five transistor array as basis for his mononstable and level
    shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216

    Two of the NPN parts could make up my emitter-coupled monostable, and
    the two PNP parts could level shift the output.

    The Renesas website offers Spice models for both the NPN and the PNP transistors, which one could plug into an LTSpice simulation, at the
    cost of making it look too messy for the more sensitive designers to be
    able to look at.

    --
    Bill Sloman, Sydney


    --
    This email has been checked for viruses by Norton antivirus software. www.norton.com

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Edward Rawde on Thu Jun 13 23:38:57 2024
    "Edward Rawde" <invalid@invalid.invalid> wrote in message news:v4gd7l$12ic$1@nnrp.usenet.blueworldhosting.com...
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array. >>
    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself.
    It's late now but I got as far as Time step too small.


    Eight additional line breaks will need to be removed.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Bill Sloman on Thu Jun 13 23:25:37 2024
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself.
    It's late now but I got as far as Time step too small.

    Version 4
    SHEET 1 2848 1304
    WIRE -592 528 -752 528
    WIRE -240 528 -592 528
    WIRE -64 528 -240 528
    WIRE 32 528 -64 528
    WIRE -64 544 -64 528
    WIRE 32 560 32 528
    WIRE -592 576 -592 528
    WIRE -240 592 -240 528
    WIRE -752 624 -752 528
    WIRE -64 656 -64 624
    WIRE -592 704 -592 656
    WIRE -464 704 -592 704
    WIRE -384 704 -464 704
    WIRE -240 704 -240 672
    WIRE -240 704 -320 704
    WIRE -128 704 -240 704
    WIRE -464 736 -464 704
    WIRE -240 736 -240 704
    WIRE -752 784 -752 704
    WIRE -64 784 -64 752
    WIRE 32 784 32 640
    WIRE 32 784 -64 784
    WIRE -592 832 -592 704
    WIRE 32 832 32 784
    WIRE -512 880 -528 880
    WIRE -464 880 -464 816
    WIRE -464 880 -512 880
    WIRE -448 880 -464 880
    WIRE -384 880 -320 704
    WIRE -320 880 -384 704
    WIRE -240 880 -240 816
    WIRE -240 880 -256 880
    WIRE -208 880 -240 880
    WIRE -32 880 -208 880
    WIRE -208 912 -208 880
    WIRE -512 928 -512 880
    WIRE -592 1008 -592 928
    WIRE -512 1008 -512 992
    WIRE -512 1008 -592 1008
    WIRE -208 1008 -208 976
    WIRE 32 1008 32 928
    WIRE 32 1008 -208 1008
    WIRE -592 1040 -592 1008
    WIRE 32 1040 32 1008
    FLAG 32 1040 0
    FLAG -592 1040 0
    FLAG -752 784 0
    SYMBOL RES -608 560 R0
    SYMATTR InstName R1
    SYMATTR Value 1Meg
    SYMBOL res 16 544 R0
    SYMATTR InstName R10
    SYMATTR Value 2Meg
    SYMBOL cap -384 864 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C1
    SYMATTR Value 1.5p
    SYMBOL cap -256 864 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C2
    SYMATTR Value 1.5p
    SYMBOL VOLTAGE -752 608 R0
    SYMATTR InstName V1
    SYMATTR Value 5
    SYMBOL npn -32 832 R0
    SYMATTR InstName Q1
    SYMATTR Value NUHFARRY
    SYMBOL npn -528 832 M0
    SYMATTR InstName Q2
    SYMATTR Value NUHFARRY
    SYMBOL res -256 720 R0
    SYMATTR InstName R3
    SYMATTR Value 4.7Meg
    SYMBOL res -480 720 R0
    SYMATTR InstName R4
    SYMATTR Value 4.701Meg
    SYMBOL cap -528 928 R0
    SYMATTR InstName C3
    SYMATTR Value 0.68p
    SYMBOL cap -224 912 R0
    SYMATTR InstName C4
    SYMATTR Value 0.68p
    SYMBOL npn -128 656 R0
    SYMATTR InstName Q10
    SYMATTR Value NUHFARRY
    SYMBOL RES -256 576 R0
    WINDOW 3 30 76 Left 2
    SYMATTR Value 1Meg
    SYMATTR InstName R2
    SYMBOL RES -48 640 R180
    WINDOW 0 36 76 Left 2
    WINDOW 3 36 40 Left 2
    SYMATTR InstName R11
    SYMATTR Value 1Meg
    TEXT -768 1176 Left 0 !.tran 0 150u 50u startup
    TEXT -776 1112 Left 0 ;This example schematic is supplied for informational/educational purposes only.\nJuly 7, 2008 by Bill Sloman
    (but blame the Q10 output stage on James Arthur).
    TEXT -480 1176 Left 0 !.model NUHFARRY NPN\n+ (IS = 1.840E - 16 XTI = 3.000E + 00 EG = 1.110E + 00 VAF = 7.200E + 01\n+ VAR = 4.500E
    + 00 BF = 1.036E + 02 ISE = 1.686E - 19 NE = 1.400E + 00\n+ IKF = 5.400E - 02 XTB = 0.000E + 00 BR = 1.000E + 01 ISC = 1.605E -
    14\n+ NC = 1.800E + 00 IKR = 5.400E - 02 RC = 1.140E + 01 CJC = 3.980E - 13\n+ MJC = 2.400E - 01 VJC = 9.700E - 01 FC = 5.000E - 01
    CJE = 2.400E - 13\n+ MJE = 5.100E- 01 VJE = 8.690E - 01 TR = 4.000E - 09 TF = 10.51E - 12\n+ ITF = 3.500E - 02 XTF = 2.300E + 00 VTF
    = 3.500E + 00 PTF = 0.000E + 00\n+ XCJC = 9.000E - 01 CJS = 1.150E - 13 VJS = 7.500E - 01 MJS = 0.000E + 00\n+ RE = 1.848E + 00 RB =
    5.007E + 01 RBM = 1.974E + 00 KF = 0.000E + 00\n+ AF = 1.000E + 00)
    TEXT 112 640 Left 0 ;Q2's collector is loaded by C2,\nlimiting risetime. Q10 isolates\nQ1's collector, allowing that node\nto charge
    much more rapidly.\n \nQ10 doubles as a common-base\namplifier stage, further squaring up the\noutput from Q10's collector.\n \nThe
    new output is taken from\nQ10's collector.\n \nJames Arthur, 9-Jul-2008

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to invalid@invalid.invalid on Fri Jun 14 07:47:45 2024
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array. >>
    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself.
    It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    There's no reason to use many-GHz parts in micropower circuits. One
    reason is that the sim breaks.

    I do wish people would comment Spice sims properly, with author, date,
    and what-the-hell-this-actually-is-supposed-to-do.


    I wonder what happened to James. I think all the flaming here drove
    him away. James was fun. He always skis in short pants.



    Version 4
    SHEET 1 2848 1304
    WIRE -592 528 -752 528
    WIRE -240 528 -592 528
    WIRE -64 528 -240 528
    WIRE 32 528 -64 528
    WIRE -64 544 -64 528
    WIRE 32 560 32 528
    WIRE -592 576 -592 528
    WIRE -240 592 -240 528
    WIRE -752 624 -752 528
    WIRE -64 656 -64 624
    WIRE -592 704 -592 656
    WIRE -464 704 -592 704
    WIRE -384 704 -464 704
    WIRE -240 704 -240 672
    WIRE -240 704 -320 704
    WIRE -128 704 -240 704
    WIRE -464 736 -464 704
    WIRE -240 736 -240 704
    WIRE -752 784 -752 704
    WIRE -64 784 -64 752
    WIRE 32 784 32 640
    WIRE 32 784 -64 784
    WIRE -592 832 -592 704
    WIRE 32 832 32 784
    WIRE -512 880 -528 880
    WIRE -464 880 -464 816
    WIRE -464 880 -512 880
    WIRE -448 880 -464 880
    WIRE -384 880 -320 704
    WIRE -320 880 -384 704
    WIRE -240 880 -240 816
    WIRE -240 880 -256 880
    WIRE -208 880 -240 880
    WIRE -32 880 -208 880
    WIRE -208 912 -208 880
    WIRE -512 928 -512 880
    WIRE -592 1008 -592 928
    WIRE -512 1008 -512 992
    WIRE -512 1008 -592 1008
    WIRE -208 1008 -208 976
    WIRE 32 1008 32 928
    WIRE 32 1008 -208 1008
    WIRE -592 1040 -592 1008
    WIRE 32 1040 32 1008
    FLAG 32 1040 0
    FLAG -592 1040 0
    FLAG -752 784 0
    SYMBOL RES -608 560 R0
    SYMATTR InstName R1
    SYMATTR Value 1Meg
    SYMBOL res 16 544 R0
    SYMATTR InstName R10
    SYMATTR Value 2Meg
    SYMBOL cap -384 864 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C1
    SYMATTR Value 1.5p
    SYMBOL cap -256 864 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C2
    SYMATTR Value 1.5p
    SYMBOL VOLTAGE -752 608 R0
    SYMATTR InstName V1
    SYMATTR Value 5
    SYMBOL npn -32 832 R0
    SYMATTR InstName Q1
    SYMATTR Value NUHFARRY
    SYMBOL npn -528 832 M0
    SYMATTR InstName Q2
    SYMATTR Value NUHFARRY
    SYMBOL res -256 720 R0
    SYMATTR InstName R3
    SYMATTR Value 4.7Meg
    SYMBOL res -480 720 R0
    SYMATTR InstName R4
    SYMATTR Value 4.701Meg
    SYMBOL cap -528 928 R0
    SYMATTR InstName C3
    SYMATTR Value 0.68p
    SYMBOL cap -224 912 R0
    SYMATTR InstName C4
    SYMATTR Value 0.68p
    SYMBOL npn -128 656 R0
    SYMATTR InstName Q10
    SYMATTR Value NUHFARRY
    SYMBOL RES -256 576 R0
    WINDOW 3 30 76 Left 2
    SYMATTR Value 1Meg
    SYMATTR InstName R2
    SYMBOL RES -48 640 R180
    WINDOW 0 36 76 Left 2
    WINDOW 3 36 40 Left 2
    SYMATTR InstName R11
    SYMATTR Value 1Meg
    TEXT -768 1176 Left 0 !.tran 0 150u 50u startup
    TEXT -776 1112 Left 0 ;This example schematic is supplied for informational/educational purposes only.\nJuly 7, 2008 by Bill Sloman
    (but blame the Q10 output stage on James Arthur).
    TEXT -480 1176 Left 0 !.model NUHFARRY NPN\n+ (IS = 1.840E - 16 XTI = 3.000E + 00 EG = 1.110E + 00 VAF = 7.200E + 01\n+ VAR = 4.500E
    + 00 BF = 1.036E + 02 ISE = 1.686E - 19 NE = 1.400E + 00\n+ IKF = 5.400E - 02 XTB = 0.000E + 00 BR = 1.000E + 01 ISC = 1.605E -
    14\n+ NC = 1.800E + 00 IKR = 5.400E - 02 RC = 1.140E + 01 CJC = 3.980E - 13\n+ MJC = 2.400E - 01 VJC = 9.700E - 01 FC = 5.000E - 01
    CJE = 2.400E - 13\n+ MJE = 5.100E- 01 VJE = 8.690E - 01 TR = 4.000E - 09 TF = 10.51E - 12\n+ ITF = 3.500E - 02 XTF = 2.300E + 00 VTF
    = 3.500E + 00 PTF = 0.000E + 00\n+ XCJC = 9.000E - 01 CJS = 1.150E - 13 VJS = 7.500E - 01 MJS = 0.000E + 00\n+ RE = 1.848E + 00 RB =
    5.007E + 01 RBM = 1.974E + 00 KF = 0.000E + 00\n+ AF = 1.000E + 00)
    TEXT 112 640 Left 0 ;Q2's collector is loaded by C2,\nlimiting risetime. Q10 isolates\nQ1's collector, allowing that node\nto charge
    much more rapidly.\n \nQ10 doubles as a common-base\namplifier stage, further squaring up the\noutput from Q10's collector.\n \nThe
    new output is taken from\nQ10's collector.\n \nJames Arthur, 9-Jul-2008


    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to john larkin on Fri Jun 14 11:08:56 2024
    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array. >>>
    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself.
    It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.


    There's no reason to use many-GHz parts in micropower circuits. One
    reason is that the sim breaks.

    I do wish people would comment Spice sims properly, with author, date,
    and what-the-hell-this-actually-is-supposed-to-do.


    I wonder what happened to James. I think all the flaming here drove
    him away. James was fun. He always skis in short pants.



    Version 4
    SHEET 1 2848 1304
    WIRE -592 528 -752 528
    WIRE -240 528 -592 528
    WIRE -64 528 -240 528
    WIRE 32 528 -64 528
    WIRE -64 544 -64 528
    WIRE 32 560 32 528
    WIRE -592 576 -592 528
    WIRE -240 592 -240 528
    WIRE -752 624 -752 528
    WIRE -64 656 -64 624
    WIRE -592 704 -592 656
    WIRE -464 704 -592 704
    WIRE -384 704 -464 704
    WIRE -240 704 -240 672
    WIRE -240 704 -320 704
    WIRE -128 704 -240 704
    WIRE -464 736 -464 704
    WIRE -240 736 -240 704
    WIRE -752 784 -752 704
    WIRE -64 784 -64 752
    WIRE 32 784 32 640
    WIRE 32 784 -64 784
    WIRE -592 832 -592 704
    WIRE 32 832 32 784
    WIRE -512 880 -528 880
    WIRE -464 880 -464 816
    WIRE -464 880 -512 880
    WIRE -448 880 -464 880
    WIRE -384 880 -320 704
    WIRE -320 880 -384 704
    WIRE -240 880 -240 816
    WIRE -240 880 -256 880
    WIRE -208 880 -240 880
    WIRE -32 880 -208 880
    WIRE -208 912 -208 880
    WIRE -512 928 -512 880
    WIRE -592 1008 -592 928
    WIRE -512 1008 -512 992
    WIRE -512 1008 -592 1008
    WIRE -208 1008 -208 976
    WIRE 32 1008 32 928
    WIRE 32 1008 -208 1008
    WIRE -592 1040 -592 1008
    WIRE 32 1040 32 1008
    FLAG 32 1040 0
    FLAG -592 1040 0
    FLAG -752 784 0
    SYMBOL RES -608 560 R0
    SYMATTR InstName R1
    SYMATTR Value 1Meg
    SYMBOL res 16 544 R0
    SYMATTR InstName R10
    SYMATTR Value 2Meg
    SYMBOL cap -384 864 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C1
    SYMATTR Value 1.5p
    SYMBOL cap -256 864 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C2
    SYMATTR Value 1.5p
    SYMBOL VOLTAGE -752 608 R0
    SYMATTR InstName V1
    SYMATTR Value 5
    SYMBOL npn -32 832 R0
    SYMATTR InstName Q1
    SYMATTR Value NUHFARRY
    SYMBOL npn -528 832 M0
    SYMATTR InstName Q2
    SYMATTR Value NUHFARRY
    SYMBOL res -256 720 R0
    SYMATTR InstName R3
    SYMATTR Value 4.7Meg
    SYMBOL res -480 720 R0
    SYMATTR InstName R4
    SYMATTR Value 4.701Meg
    SYMBOL cap -528 928 R0
    SYMATTR InstName C3
    SYMATTR Value 0.68p
    SYMBOL cap -224 912 R0
    SYMATTR InstName C4
    SYMATTR Value 0.68p
    SYMBOL npn -128 656 R0
    SYMATTR InstName Q10
    SYMATTR Value NUHFARRY
    SYMBOL RES -256 576 R0
    WINDOW 3 30 76 Left 2
    SYMATTR Value 1Meg
    SYMATTR InstName R2
    SYMBOL RES -48 640 R180
    WINDOW 0 36 76 Left 2
    WINDOW 3 36 40 Left 2
    SYMATTR InstName R11
    SYMATTR Value 1Meg
    TEXT -768 1176 Left 0 !.tran 0 150u 50u startup
    TEXT -776 1112 Left 0 ;This example schematic is supplied for informational/educational purposes only.\nJuly 7, 2008 by Bill
    Sloman
    (but blame the Q10 output stage on James Arthur).
    TEXT -480 1176 Left 0 !.model NUHFARRY NPN\n+ (IS = 1.840E - 16 XTI = 3.000E + 00 EG = 1.110E + 00 VAF = 7.200E + 01\n+ VAR =
    4.500E
    + 00 BF = 1.036E + 02 ISE = 1.686E - 19 NE = 1.400E + 00\n+ IKF = 5.400E - 02 XTB = 0.000E + 00 BR = 1.000E + 01 ISC = 1.605E -
    14\n+ NC = 1.800E + 00 IKR = 5.400E - 02 RC = 1.140E + 01 CJC = 3.980E - 13\n+ MJC = 2.400E - 01 VJC = 9.700E - 01 FC = 5.000E -
    01
    CJE = 2.400E - 13\n+ MJE = 5.100E- 01 VJE = 8.690E - 01 TR = 4.000E - 09 TF = 10.51E - 12\n+ ITF = 3.500E - 02 XTF = 2.300E + 00
    VTF
    = 3.500E + 00 PTF = 0.000E + 00\n+ XCJC = 9.000E - 01 CJS = 1.150E - 13 VJS = 7.500E - 01 MJS = 0.000E + 00\n+ RE = 1.848E + 00 RB
    =
    5.007E + 01 RBM = 1.974E + 00 KF = 0.000E + 00\n+ AF = 1.000E + 00)
    TEXT 112 640 Left 0 ;Q2's collector is loaded by C2,\nlimiting risetime. Q10 isolates\nQ1's collector, allowing that node\nto
    charge
    much more rapidly.\n \nQ10 doubles as a common-base\namplifier stage, further squaring up the\noutput from Q10's collector.\n
    \nThe
    new output is taken from\nQ10's collector.\n \nJames Arthur, 9-Jul-2008


    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to invalid@invalid.invalid on Fri Jun 14 09:03:03 2024
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array. >>>>
    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself.
    It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!



    There's no reason to use many-GHz parts in micropower circuits. One
    reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.
    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets
    around, but the monolithic arrays are mostly gone.

    The duals save space, but aren't well matched so are electrically and
    thermally equivalent to buying two separate parts.

    I wonder if one could design really fast stuff with the HFA3046.
    Package parasitics look nasty. And the big package will force ugly PCB
    routing. You can plop a single tiny transistor wherever you want.

    The HFA parts are either 5 NPNs or 5 PNPs, which is also awkward.




    I do wish people would comment Spice sims properly, with author, date,
    and what-the-hell-this-actually-is-supposed-to-do.


    I wonder what happened to James. I think all the flaming here drove
    him away. James was fun. He always skis in short pants.



    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Gerhard Hoffmann@21:1/5 to All on Fri Jun 14 18:20:06 2024
    Am 14.06.24 um 18:03 schrieb john larkin:

    I wonder if one could design really fast stuff with the HFA3046.
    Package parasitics look nasty. And the big package will force ugly PCB routing. You can plop a single tiny transistor wherever you want.

    The HFA parts are either 5 NPNs or 5 PNPs, which is also awkward.

    I did design a 1:1000 dual slope timer stretcher with them featuring
    5 ps resolution. The nice thing was that temp effects cancelled.
    We tested that with synthesized xtal ovens --> 1pps signal and a 1.0000000??0001 pps that slowly drifted by.

    With a space proof ceramic flat pack with even worse parasitics.
    And yes, Methinks it was Harris before, bought up by Renesas.

    cheers, Gerhard

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to john larkin on Fri Jun 14 12:18:23 2024
    "john larkin" <jl@650pot.com> wrote in message news:8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com...
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!



    There's no reason to use many-GHz parts in micropower circuits. One
    reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.

    If it's obsolete or going obsolete then yes it would make no sense to use it.
    I would guess that you get to do plenty of work because a manufacturer has suddenly decided to discontinue a part.

    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets
    around, but the monolithic arrays are mostly gone.

    What part would you recommend (single or dual) and does it have a working LTSpice model?


    The duals save space, but aren't well matched so are electrically and thermally equivalent to buying two separate parts.

    I wonder if one could design really fast stuff with the HFA3046.
    Package parasitics look nasty. And the big package will force ugly PCB routing. You can plop a single tiny transistor wherever you want.

    Yes that is certainly an advantage of single transistors.
    Is a suitable single transistor still available for use in new designs?


    The HFA parts are either 5 NPNs or 5 PNPs, which is also awkward.

    3096 is three NPN two PNP





    I do wish people would comment Spice sims properly, with author, date,
    and what-the-hell-this-actually-is-supposed-to-do.


    I wonder what happened to James. I think all the flaming here drove
    him away. James was fun. He always skis in short pants.



    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to invalid@invalid.invalid on Fri Jun 14 09:33:43 2024
    On Fri, 14 Jun 2024 12:18:23 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com...
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!



    There's no reason to use many-GHz parts in micropower circuits. One
    reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.

    If it's obsolete or going obsolete then yes it would make no sense to use it. >I would guess that you get to do plenty of work because a manufacturer has suddenly decided to discontinue a part.

    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets
    around, but the monolithic arrays are mostly gone.

    What part would you recommend (single or dual) and does it have a working LTSpice model?

    Just pull up some parts from the standard library, some low current
    NPNs like BC547 maybe. Look for low capacitances if you care about
    that; the HFAs are good in that respect.

    Why do people avoid making clean 4-wire connections on schematics?



    The duals save space, but aren't well matched so are electrically and
    thermally equivalent to buying two separate parts.

    I wonder if one could design really fast stuff with the HFA3046.
    Package parasitics look nasty. And the big package will force ugly PCB
    routing. You can plop a single tiny transistor wherever you want.

    Yes that is certainly an advantage of single transistors.
    Is a suitable single transistor still available for use in new designs?


    There are zillions of single transistors around. I like BCX70 as an
    npn gumdrop, although I use mosfets more often for simple things.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to john larkin on Fri Jun 14 12:44:33 2024
    "john larkin" <jl@650pot.com> wrote in message news:viro6jlt7h02ehbsq20em8uv5snn3736up@4ax.com...
    On Fri, 14 Jun 2024 12:18:23 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com...
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>>It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!



    There's no reason to use many-GHz parts in micropower circuits. One
    reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.

    If it's obsolete or going obsolete then yes it would make no sense to use it. >>I would guess that you get to do plenty of work because a manufacturer has suddenly decided to discontinue a part.

    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets
    around, but the monolithic arrays are mostly gone.

    What part would you recommend (single or dual) and does it have a working LTSpice model?

    Just pull up some parts from the standard library, some low current
    NPNs like BC547 maybe. Look for low capacitances if you care about
    that; the HFAs are good in that respect.

    Yes but BC547 sounds almost as ancient as BC107
    Are they still in production?
    What would work well at a GHz or two or more?


    Why do people avoid making clean 4-wire connections on schematics?

    Some places have rules about that.
    I had trouble once, even though I put a very obvious and big blob where the join should have been.
    When doing schematics of my own I prefer to avoid a one-blob 4-wire join. Use two blobs.




    The duals save space, but aren't well matched so are electrically and
    thermally equivalent to buying two separate parts.

    I wonder if one could design really fast stuff with the HFA3046.
    Package parasitics look nasty. And the big package will force ugly PCB
    routing. You can plop a single tiny transistor wherever you want.

    Yes that is certainly an advantage of single transistors.
    Is a suitable single transistor still available for use in new designs?


    There are zillions of single transistors around. I like BCX70 as an
    npn gumdrop, although I use mosfets more often for simple things.


    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to invalid@invalid.invalid on Fri Jun 14 10:11:12 2024
    On Fri, 14 Jun 2024 12:44:33 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:viro6jlt7h02ehbsq20em8uv5snn3736up@4ax.com...
    On Fri, 14 Jun 2024 12:18:23 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com...
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>>>It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!



    There's no reason to use many-GHz parts in micropower circuits. One >>>>>> reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.

    If it's obsolete or going obsolete then yes it would make no sense to use it.
    I would guess that you get to do plenty of work because a manufacturer has suddenly decided to discontinue a part.

    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets
    around, but the monolithic arrays are mostly gone.

    What part would you recommend (single or dual) and does it have a working LTSpice model?

    Just pull up some parts from the standard library, some low current
    NPNs like BC547 maybe. Look for low capacitances if you care about
    that; the HFAs are good in that respect.

    Yes but BC547 sounds almost as ancient as BC107
    Are they still in production?

    It was just an example of a library part, but Digikey will sell you a
    million pieces.

    What would work well at a GHz or two or more?

    For switching? Tuned RF?

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From piglet@21:1/5 to john larkin on Fri Jun 14 18:59:59 2024
    On 14/06/2024 17:03, john larkin wrote:
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself.
    It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!


    Yeah, there is something very wrong with that transistor model.

    Here is an emitter coupled multivib that can run fast. Should be
    possible somehow to gate it into being a monostable - worst case wrap a
    latch around it so it runs just one pulse?


    Version 4
    SHEET 1 2848 1304
    WIRE -512 528 -752 528
    WIRE -336 528 -512 528
    WIRE -336 576 -336 528
    WIRE -752 624 -752 528
    WIRE -512 672 -512 528
    WIRE -336 688 -336 656
    WIRE -224 688 -336 688
    WIRE -336 720 -336 688
    WIRE -336 720 -448 720
    WIRE -336 752 -336 720
    WIRE -752 800 -752 704
    WIRE -656 800 -752 800
    WIRE -224 800 -272 800
    WIRE -656 832 -656 800
    WIRE -224 848 -224 800
    WIRE -752 880 -752 800
    WIRE -512 880 -512 768
    WIRE -448 880 -512 880
    WIRE -336 880 -336 848
    WIRE -336 880 -384 880
    WIRE -512 944 -512 880
    WIRE -336 944 -336 880
    WIRE -752 1072 -752 960
    WIRE -512 1072 -512 1024
    WIRE -512 1072 -752 1072
    WIRE -336 1072 -336 1024
    WIRE -336 1072 -512 1072
    FLAG -224 848 0
    FLAG -656 832 0
    FLAG -224 688 out
    SYMBOL VOLTAGE -752 608 R0
    SYMATTR InstName V1
    SYMATTR Value 5
    SYMBOL npn -448 672 M0
    SYMATTR InstName Q1
    SYMATTR Value 2SC3838K
    SYMBOL npn -272 752 M0
    SYMATTR InstName Q2
    SYMATTR Value 2SC3838K
    SYMBOL VOLTAGE -752 864 R0
    SYMATTR InstName V2
    SYMATTR Value 5
    SYMBOL res -352 560 R0
    SYMATTR InstName R2
    SYMATTR Value 390
    SYMBOL cap -384 864 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C1
    SYMATTR Value 5p
    SYMBOL res -528 928 R0
    SYMATTR InstName R3
    SYMATTR Value 1k
    SYMBOL res -352 928 R0
    SYMATTR InstName R4
    SYMATTR Value 1k
    TEXT -816 1112 Left 0 !.tran 100u
    TEXT -120 976 Left 2 ;EPW SED JUN 2024
    TEXT -264 1064 Left 2 ;FAST ASTABLE MULTIVIBRATOR
    TEXT -120 1032 Left 2 ;EMITTER COUPLED
    TEXT -144 848 Left 1 ;TRADITIONALLY SHOWN WITH
    TEXT -176 872 Left 1 ;CURRENT SOURCES FOR EMITTERS
    TEXT -160 896 Left 1 ;TRY CHANGING R3 R4 FOR 5mA ?
    TEXT -152 552 Left 1 ;ALTERNATIVE OUTPUT CAN BE
    TEXT -192 576 Left 1 ;TAKEN ACROSS R IN Q1 COLLECTOR


    piglet

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to piglet on Fri Jun 14 15:50:31 2024
    "piglet" <erichpwagner@hotmail.com> wrote in message news:v4i0ev$304v8$1@dont-email.me...
    On 14/06/2024 17:03, john larkin wrote:
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself.
    It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!


    Yeah, there is something very wrong with that transistor model.

    Here is an emitter coupled multivib that can run fast. Should be possible somehow to gate it into being a monostable - worst case
    wrap a latch around it so it runs just one pulse?


    Now we're getting somewhere. Thanks piglet. 2SC3838K typical ft 3.2 GHz and available.
    However it's not recommended for new designs if you believe the rohm site.
    So I wonder if it has a successor which is available.

    NSVF6001SB6T1G looks interesting but no sign of a model other than symbol, footprint and 3D that I can find.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to john larkin on Fri Jun 14 15:19:08 2024
    "john larkin" <jl@650pot.com> wrote in message news:m7uo6jhfuobfcjaps5o6hatlnm6ntnv84m@4ax.com...
    On Fri, 14 Jun 2024 12:44:33 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:viro6jlt7h02ehbsq20em8uv5snn3736up@4ax.com...
    On Fri, 14 Jun 2024 12:18:23 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com...
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>>>>It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!



    There's no reason to use many-GHz parts in micropower circuits. One >>>>>>> reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.

    If it's obsolete or going obsolete then yes it would make no sense to use it.
    I would guess that you get to do plenty of work because a manufacturer has suddenly decided to discontinue a part.

    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets >>>>> around, but the monolithic arrays are mostly gone.

    What part would you recommend (single or dual) and does it have a working LTSpice model?

    Just pull up some parts from the standard library, some low current
    NPNs like BC547 maybe. Look for low capacitances if you care about
    that; the HFAs are good in that respect.

    Yes but BC547 sounds almost as ancient as BC107
    Are they still in production?

    It was just an example of a library part, but Digikey will sell you a
    million pieces.

    What would work well at a GHz or two or more?

    For switching? Tuned RF?

    I meant a specific npn part and maybe also pnp which is not going obsolete.



    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to invalid@invalid.invalid on Fri Jun 14 12:57:17 2024
    On Fri, 14 Jun 2024 15:19:08 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:m7uo6jhfuobfcjaps5o6hatlnm6ntnv84m@4ax.com...
    On Fri, 14 Jun 2024 12:44:33 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:viro6jlt7h02ehbsq20em8uv5snn3736up@4ax.com...
    On Fri, 14 Jun 2024 12:18:23 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com...
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>>>>>It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!



    There's no reason to use many-GHz parts in micropower circuits. One >>>>>>>> reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.

    If it's obsolete or going obsolete then yes it would make no sense to use it.
    I would guess that you get to do plenty of work because a manufacturer has suddenly decided to discontinue a part.

    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets >>>>>> around, but the monolithic arrays are mostly gone.

    What part would you recommend (single or dual) and does it have a working LTSpice model?

    Just pull up some parts from the standard library, some low current
    NPNs like BC547 maybe. Look for low capacitances if you care about
    that; the HFAs are good in that respect.

    Yes but BC547 sounds almost as ancient as BC107
    Are they still in production?

    It was just an example of a library part, but Digikey will sell you a
    million pieces.

    What would work well at a GHz or two or more?

    For switching? Tuned RF?

    I meant a specific npn part and maybe also pnp which is not going obsolete.




    You can search Mouser or Digikey for a multi-sourced part.

    Sadly, fast PNPs are mostly going EOL, faster than NPNs. And all the
    good things, like GaN and SiC and phemts, are n-types. Nature must
    dislike P-things.

    Designing with disctetes is educational, but nowadays ICs are the
    practical winners. Like wideband MMICs for 10 cents, opamps and
    switching regulators for 15.

    Gotta move up the abstraction stack.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to invalid@invalid.invalid on Fri Jun 14 12:59:37 2024
    On Fri, 14 Jun 2024 15:50:31 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "piglet" <erichpwagner@hotmail.com> wrote in message news:v4i0ev$304v8$1@dont-email.me...
    On 14/06/2024 17:03, john larkin wrote:
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>> It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!


    Yeah, there is something very wrong with that transistor model.

    Here is an emitter coupled multivib that can run fast. Should be possible somehow to gate it into being a monostable - worst case
    wrap a latch around it so it runs just one pulse?


    Now we're getting somewhere. Thanks piglet. 2SC3838K typical ft 3.2 GHz and available.
    However it's not recommended for new designs if you believe the rohm site.
    So I wonder if it has a successor which is available.

    NSVF6001SB6T1G looks interesting but no sign of a model other than symbol, footprint and 3D that I can find.


    I like BFS17. It's fast, but not so fast as to get cranky. It
    generally behaves.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From bitrex@21:1/5 to john larkin on Fri Jun 14 16:35:59 2024
    On 6/14/2024 12:33 PM, john larkin wrote:
    On Fri, 14 Jun 2024 12:18:23 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com...
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>> It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!



    There's no reason to use many-GHz parts in micropower circuits. One
    reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.

    If it's obsolete or going obsolete then yes it would make no sense to use it.
    I would guess that you get to do plenty of work because a manufacturer has suddenly decided to discontinue a part.

    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets
    around, but the monolithic arrays are mostly gone.

    What part would you recommend (single or dual) and does it have a working LTSpice model?

    Just pull up some parts from the standard library, some low current
    NPNs like BC547 maybe. Look for low capacitances if you care about
    that; the HFAs are good in that respect.

    Why do people avoid making clean 4-wire connections on schematics?

    There's this new trend of breaking the circuit schematic up into little
    boxes like this, it's nuts:

    <https://hackaday.com/wp-content/uploads/2024/05/hadimg_desrev_ltc4040_6.png>

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to john larkin on Fri Jun 14 17:55:10 2024
    "john larkin" <jl@650pot.com> wrote in message news:778p6jli5d9ba92cag0pl4pcsl22qphm2s@4ax.com...
    On Fri, 14 Jun 2024 15:50:31 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "piglet" <erichpwagner@hotmail.com> wrote in message news:v4i0ev$304v8$1@dont-email.me...
    On 14/06/2024 17:03, john larkin wrote:
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>>> It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!


    Yeah, there is something very wrong with that transistor model.

    Here is an emitter coupled multivib that can run fast. Should be possible somehow to gate it into being a monostable - worst
    case
    wrap a latch around it so it runs just one pulse?


    Now we're getting somewhere. Thanks piglet. 2SC3838K typical ft 3.2 GHz and available.
    However it's not recommended for new designs if you believe the rohm site. >>So I wonder if it has a successor which is available.

    NSVF6001SB6T1G looks interesting but no sign of a model other than symbol, footprint and 3D that I can find.


    I like BFS17. It's fast, but not so fast as to get cranky. It
    generally behaves.

    But looks like it's going obsolete. 55GN01FA is on the list of alternatives.




    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to bitrex on Fri Jun 14 16:10:25 2024
    On Fri, 14 Jun 2024 16:35:59 -0400, bitrex <user@example.net> wrote:

    On 6/14/2024 12:33 PM, john larkin wrote:
    On Fri, 14 Jun 2024 12:18:23 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com...
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>>> It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!



    There's no reason to use many-GHz parts in micropower circuits. One >>>>>> reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.

    If it's obsolete or going obsolete then yes it would make no sense to use it.
    I would guess that you get to do plenty of work because a manufacturer has suddenly decided to discontinue a part.

    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets
    around, but the monolithic arrays are mostly gone.

    What part would you recommend (single or dual) and does it have a working LTSpice model?

    Just pull up some parts from the standard library, some low current
    NPNs like BC547 maybe. Look for low capacitances if you care about
    that; the HFAs are good in that respect.

    Why do people avoid making clean 4-wire connections on schematics?

    There's this new trend of breaking the circuit schematic up into little
    boxes like this, it's nuts:

    <https://hackaday.com/wp-content/uploads/2024/05/hadimg_desrev_ltc4040_6.png>



    That's criminal.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to invalid@invalid.invalid on Fri Jun 14 16:17:18 2024
    On Fri, 14 Jun 2024 17:55:10 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:778p6jli5d9ba92cag0pl4pcsl22qphm2s@4ax.com...
    On Fri, 14 Jun 2024 15:50:31 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "piglet" <erichpwagner@hotmail.com> wrote in message news:v4i0ev$304v8$1@dont-email.me...
    On 14/06/2024 17:03, john larkin wrote:
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>>>> It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!


    Yeah, there is something very wrong with that transistor model.

    Here is an emitter coupled multivib that can run fast. Should be possible somehow to gate it into being a monostable - worst
    case
    wrap a latch around it so it runs just one pulse?


    Now we're getting somewhere. Thanks piglet. 2SC3838K typical ft 3.2 GHz and available.
    However it's not recommended for new designs if you believe the rohm site. >>>So I wonder if it has a successor which is available.

    NSVF6001SB6T1G looks interesting but no sign of a model other than symbol, footprint and 3D that I can find.


    I like BFS17. It's fast, but not so fast as to get cranky. It
    generally behaves.

    But looks like it's going obsolete. 55GN01FA is on the list of alternatives.





    Digikey shows two active sources. My inventory program shows MMBTH10
    as an alternate.

    Mouser has a million BFS17s in stock.

    1 GHz is a nice speed for lots of things.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to john larkin on Fri Jun 14 23:41:13 2024
    "john larkin" <jl@650pot.com> wrote in message news:jijp6jd83gito3ovhb9imlipp5str2ln9p@4ax.com...
    On Fri, 14 Jun 2024 17:55:10 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:778p6jli5d9ba92cag0pl4pcsl22qphm2s@4ax.com...
    On Fri, 14 Jun 2024 15:50:31 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "piglet" <erichpwagner@hotmail.com> wrote in message news:v4i0ev$304v8$1@dont-email.me...
    On 14/06/2024 17:03, john larkin wrote:
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>>>>> It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!


    Yeah, there is something very wrong with that transistor model.

    Here is an emitter coupled multivib that can run fast. Should be possible somehow to gate it into being a monostable - worst
    case
    wrap a latch around it so it runs just one pulse?


    Now we're getting somewhere. Thanks piglet. 2SC3838K typical ft 3.2 GHz and available.
    However it's not recommended for new designs if you believe the rohm site. >>>>So I wonder if it has a successor which is available.

    NSVF6001SB6T1G looks interesting but no sign of a model other than symbol, footprint and 3D that I can find.


    I like BFS17. It's fast, but not so fast as to get cranky. It
    generally behaves.

    But looks like it's going obsolete. 55GN01FA is on the list of alternatives. >>




    Digikey shows two active sources. My inventory program shows MMBTH10
    as an alternate.

    Mouser has a million BFS17s in stock.

    Ok well let's hope the likes of Musk doesn't need them.

    The rest of us might need a part which, as far as I can tell, doesn't have any signs of pending obsolescence.

    To that end I went hunting for models of the 55GN01FA and managed to find the file 55GN01FA.mps which contains the PS (P Spice?)
    parameter set.
    After downloading another file (image) to make sure I knew my Yottas from my yoctos I converted that file to a model which is
    accepted by LTSpice

    Some model parameters were not accepted by LTSpice so they were removed. Namely LE LB LC Cbe Cbc Cce cc and Q1.AREA

    The result was as follows.

    The point of this is to test the 55GN01FA model. No-one is claiming that this is a monostable or that it is fast.

    Version 4
    SHEET 1 2848 1316
    WIRE -592 512 -752 512
    WIRE -240 512 -592 512
    WIRE -64 512 -240 512
    WIRE 32 512 -64 512
    WIRE -64 528 -64 512
    WIRE 32 528 32 512
    WIRE -592 576 -592 512
    WIRE -240 592 -240 512
    WIRE -752 624 -752 512
    WIRE -64 624 -64 608
    WIRE 192 624 -64 624
    WIRE 208 624 192 624
    WIRE -64 640 -64 624
    WIRE -240 688 -240 672
    WIRE -128 688 -240 688
    WIRE -592 704 -592 656
    WIRE -464 704 -592 704
    WIRE -384 704 -464 704
    WIRE -240 704 -240 688
    WIRE -240 704 -320 704
    WIRE -464 736 -464 704
    WIRE -240 736 -240 704
    WIRE -64 768 -64 736
    WIRE 32 768 32 608
    WIRE 32 768 -64 768
    WIRE -752 784 -752 704
    WIRE -592 832 -592 704
    WIRE 32 832 32 768
    WIRE -512 880 -528 880
    WIRE -464 880 -464 816
    WIRE -464 880 -512 880
    WIRE -448 880 -464 880
    WIRE -384 880 -320 704
    WIRE -320 880 -384 704
    WIRE -240 880 -240 816
    WIRE -240 880 -256 880
    WIRE -208 880 -240 880
    WIRE -32 880 -208 880
    WIRE -208 912 -208 880
    WIRE -512 928 -512 880
    WIRE -592 1008 -592 928
    WIRE -512 1008 -512 992
    WIRE -512 1008 -592 1008
    WIRE -208 1008 -208 976
    WIRE 32 1008 32 928
    WIRE 32 1008 -208 1008
    WIRE -592 1040 -592 1008
    WIRE 32 1040 32 1008
    FLAG 32 1040 0
    FLAG -592 1040 0
    FLAG -752 784 0
    FLAG 192 624 out
    SYMBOL RES -608 560 R0
    SYMATTR InstName R1
    SYMATTR Value 1Meg
    SYMBOL res 16 512 R0
    SYMATTR InstName R10
    SYMATTR Value 2Meg
    SYMBOL cap -384 864 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C1
    SYMATTR Value 1.5p
    SYMBOL cap -256 864 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C2
    SYMATTR Value 1.5p
    SYMBOL VOLTAGE -752 608 R0
    SYMATTR InstName V1
    SYMATTR Value 5
    SYMBOL npn -32 832 R0
    SYMATTR InstName Q1
    SYMATTR Value 55GN01FA
    SYMBOL npn -528 832 M0
    SYMATTR InstName Q2
    SYMATTR Value 55GN01FA
    SYMBOL res -256 720 R0
    SYMATTR InstName R3
    SYMATTR Value 4.7Meg
    SYMBOL res -480 720 R0
    SYMATTR InstName R4
    SYMATTR Value 4.701Meg
    SYMBOL cap -528 928 R0
    SYMATTR InstName C3
    SYMATTR Value 0.68p
    SYMBOL cap -224 912 R0
    SYMATTR InstName C4
    SYMATTR Value 0.68p
    SYMBOL npn -128 640 R0
    SYMATTR InstName Q10
    SYMATTR Value 55GN01FA
    SYMBOL RES -256 576 R0
    WINDOW 3 30 76 Left 2
    SYMATTR Value 1Meg
    SYMATTR InstName R2
    SYMBOL RES -48 624 R180
    WINDOW 0 36 76 Left 2
    WINDOW 3 36 40 Left 2
    SYMATTR InstName R11
    SYMATTR Value 1Meg
    TEXT -768 1176 Left 0 !.tran 0 150u 50u startup
    TEXT -776 1112 Left 0 ;This example schematic is supplied for informational/educational purposes only.\nJuly 7, 2008 by Bill Sloman
    (but blame the Q10 output stage on James Arthur).
    TEXT -480 1176 Left 0 !.model 55GN01FA NPN\n+ IS = 959.8E-18 BF = 133.0 NF = 985.0E-3 VAF = 9.557\n+ IKF = 760.0E-3 ISE = 450.0E-15
    NE = 1.810 BR = 28.89\n+ NR = 1.013 VAR = 1.700 IKR = 5.849E-3 ISC = 1.299E-15\n+ NC = 1.157 RB = 1.000 IRB = 910.0E-3 RBM =
    910.0E-3\n+ RE = 510.0E-3 RC = 1.200 XTB = 0.000 EG = 1.110\n+ XTI = 3.000 CJE = 1.050E-12 VJE = 600.0E-3 MJE = 800.0E-3\n+ TF =
    18.00E-12 XTF = 1.000 VTF = 1.000 ITF = 50.00E-3\n+ PTF = 0.000 CJC = 800.0E-15 VJC = 110.0E-3 MJC = 115.0E-3\n+ XCJC = 500.0E-3 TR
    = 1.000E-9 FC = 500.0E-3
    TEXT -32 1128 Left 0 ;Q2's collector is loaded by C2,\nlimiting risetime. Q10 isolates\nQ1's collector, allowing that node\nto
    charge much more rapidly.\n \nQ10 doubles as a common-base\namplifier stage, further squaring up the\noutput from Q10's collector.\n
    \nThe new output is taken from\nQ10's collector.\n \nJames Arthur, 9-Jul-2008 TEXT 208 696 Left 0 ;This circuit was originally\ndesigned by Bill Sloman and\nJames Arthur in 2008.\n \nThis circuit uses the
    55GN01FA\nUsing a model which was derived\nfrom information found online\nby Edward Rawde in June 2024\n \nOh and exactly why do I
    have\nto press Shift+Enter to write\nthis? Talk about frustration.\n \nMore importantly, there are\nno four way net crossovers\nwith
    a single blob (Q10 base)\n \nFrequency of oscillation appears\nto be 117 KHz. Slightly lower than\nthe BFR92A which is obsolete.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From bitrex@21:1/5 to john larkin on Sat Jun 15 00:47:00 2024
    On 6/14/2024 7:10 PM, john larkin wrote:
    On Fri, 14 Jun 2024 16:35:59 -0400, bitrex <user@example.net> wrote:

    On 6/14/2024 12:33 PM, john larkin wrote:
    On Fri, 14 Jun 2024 12:18:23 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com...
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>>>> It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!



    There's no reason to use many-GHz parts in micropower circuits. One >>>>>>> reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.

    If it's obsolete or going obsolete then yes it would make no sense to use it.
    I would guess that you get to do plenty of work because a manufacturer has suddenly decided to discontinue a part.

    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets >>>>> around, but the monolithic arrays are mostly gone.

    What part would you recommend (single or dual) and does it have a working LTSpice model?

    Just pull up some parts from the standard library, some low current
    NPNs like BC547 maybe. Look for low capacitances if you care about
    that; the HFAs are good in that respect.

    Why do people avoid making clean 4-wire connections on schematics?

    There's this new trend of breaking the circuit schematic up into little
    boxes like this, it's nuts:

    <https://hackaday.com/wp-content/uploads/2024/05/hadimg_desrev_ltc4040_6.png>



    That's criminal.


    Combining schematics and documentation in the same document is sort of
    like a toothpaste and orange juice smoothie. I like orange juice, and toothpaste is useful. However...

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to bitrex on Sat Jun 15 00:56:47 2024
    "bitrex" <user@example.net> wrote in message news:666ca9ad$0$2363142$882e4bbb@reader.netnews.com...
    On 6/14/2024 12:33 PM, john larkin wrote:
    On Fri, 14 Jun 2024 12:18:23 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com...
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>>> It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!



    There's no reason to use many-GHz parts in micropower circuits. One >>>>>> reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.

    If it's obsolete or going obsolete then yes it would make no sense to use it.
    I would guess that you get to do plenty of work because a manufacturer has suddenly decided to discontinue a part.

    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets
    around, but the monolithic arrays are mostly gone.

    What part would you recommend (single or dual) and does it have a working LTSpice model?

    Just pull up some parts from the standard library, some low current
    NPNs like BC547 maybe. Look for low capacitances if you care about
    that; the HFAs are good in that respect.

    Why do people avoid making clean 4-wire connections on schematics?

    There's this new trend of breaking the circuit schematic up into little boxes like this, it's nuts:

    <https://hackaday.com/wp-content/uploads/2024/05/hadimg_desrev_ltc4040_6.png>

    Reminds me of IEC logic symbols. Another example of nuts.





    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From legg@21:1/5 to john larkin on Sat Jun 15 09:26:13 2024
    On Fri, 14 Jun 2024 09:03:03 -0700, john larkin <jl@650pot.com> wrote:

    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!



    There's no reason to use many-GHz parts in micropower circuits. One
    reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.
    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets
    around, but the monolithic arrays are mostly gone.

    The duals save space, but aren't well matched so are electrically and >thermally equivalent to buying two separate parts.

    I wonder if one could design really fast stuff with the HFA3046.
    Package parasitics look nasty. And the big package will force ugly PCB >routing. You can plop a single tiny transistor wherever you want.

    The HFA parts are either 5 NPNs or 5 PNPs, which is also awkward.




    The original simulation of the astable multivibrator was intended
    to demonstrate reasonable speed at low power.

    The model was published by Intersil in 1996 in app note MM3046.

    The simulation runs if properly typeset.

    RL

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to invalid@invalid.invalid on Sat Jun 15 07:49:13 2024
    On Fri, 14 Jun 2024 23:41:13 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:jijp6jd83gito3ovhb9imlipp5str2ln9p@4ax.com...
    On Fri, 14 Jun 2024 17:55:10 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:778p6jli5d9ba92cag0pl4pcsl22qphm2s@4ax.com...
    On Fri, 14 Jun 2024 15:50:31 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "piglet" <erichpwagner@hotmail.com> wrote in message news:v4i0ev$304v8$1@dont-email.me...
    On 14/06/2024 17:03, john larkin wrote:
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>>>>>> It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!


    Yeah, there is something very wrong with that transistor model.

    Here is an emitter coupled multivib that can run fast. Should be possible somehow to gate it into being a monostable - worst
    case
    wrap a latch around it so it runs just one pulse?


    Now we're getting somewhere. Thanks piglet. 2SC3838K typical ft 3.2 GHz and available.
    However it's not recommended for new designs if you believe the rohm site. >>>>>So I wonder if it has a successor which is available.

    NSVF6001SB6T1G looks interesting but no sign of a model other than symbol, footprint and 3D that I can find.


    I like BFS17. It's fast, but not so fast as to get cranky. It
    generally behaves.

    But looks like it's going obsolete. 55GN01FA is on the list of alternatives. >>>




    Digikey shows two active sources. My inventory program shows MMBTH10
    as an alternate.

    Mouser has a million BFS17s in stock.

    Ok well let's hope the likes of Musk doesn't need them.

    The rest of us might need a part which, as far as I can tell, doesn't have any signs of pending obsolescence.

    Small rocks maybe.



    To that end I went hunting for models of the 55GN01FA and managed to find the file 55GN01FA.mps which contains the PS (P Spice?)
    parameter set.
    After downloading another file (image) to make sure I knew my Yottas from my yoctos I converted that file to a model which is
    accepted by LTSpice

    Some model parameters were not accepted by LTSpice so they were removed. Namely LE LB LC Cbe Cbc Cce cc and Q1.AREA

    The result was as follows.

    The point of this is to test the 55GN01FA model. No-one is claiming that this is a monostable or that it is fast.

    Version 4
    SHEET 1 2848 1316
    WIRE -592 512 -752 512
    WIRE -240 512 -592 512
    WIRE -64 512 -240 512
    WIRE 32 512 -64 512
    WIRE -64 528 -64 512
    WIRE 32 528 32 512
    WIRE -592 576 -592 512
    WIRE -240 592 -240 512
    WIRE -752 624 -752 512
    WIRE -64 624 -64 608
    WIRE 192 624 -64 624
    WIRE 208 624 192 624
    WIRE -64 640 -64 624
    WIRE -240 688 -240 672
    WIRE -128 688 -240 688
    WIRE -592 704 -592 656
    WIRE -464 704 -592 704
    WIRE -384 704 -464 704
    WIRE -240 704 -240 688
    WIRE -240 704 -320 704
    WIRE -464 736 -464 704
    WIRE -240 736 -240 704
    WIRE -64 768 -64 736
    WIRE 32 768 32 608
    WIRE 32 768 -64 768
    WIRE -752 784 -752 704
    WIRE -592 832 -592 704
    WIRE 32 832 32 768
    WIRE -512 880 -528 880
    WIRE -464 880 -464 816
    WIRE -464 880 -512 880
    WIRE -448 880 -464 880
    WIRE -384 880 -320 704
    WIRE -320 880 -384 704
    WIRE -240 880 -240 816
    WIRE -240 880 -256 880
    WIRE -208 880 -240 880
    WIRE -32 880 -208 880
    WIRE -208 912 -208 880
    WIRE -512 928 -512 880
    WIRE -592 1008 -592 928
    WIRE -512 1008 -512 992
    WIRE -512 1008 -592 1008
    WIRE -208 1008 -208 976
    WIRE 32 1008 32 928
    WIRE 32 1008 -208 1008
    WIRE -592 1040 -592 1008
    WIRE 32 1040 32 1008
    FLAG 32 1040 0
    FLAG -592 1040 0
    FLAG -752 784 0
    FLAG 192 624 out
    SYMBOL RES -608 560 R0
    SYMATTR InstName R1
    SYMATTR Value 1Meg
    SYMBOL res 16 512 R0
    SYMATTR InstName R10
    SYMATTR Value 2Meg
    SYMBOL cap -384 864 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C1
    SYMATTR Value 1.5p
    SYMBOL cap -256 864 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C2
    SYMATTR Value 1.5p
    SYMBOL VOLTAGE -752 608 R0
    SYMATTR InstName V1
    SYMATTR Value 5
    SYMBOL npn -32 832 R0
    SYMATTR InstName Q1
    SYMATTR Value 55GN01FA
    SYMBOL npn -528 832 M0
    SYMATTR InstName Q2
    SYMATTR Value 55GN01FA
    SYMBOL res -256 720 R0
    SYMATTR InstName R3
    SYMATTR Value 4.7Meg
    SYMBOL res -480 720 R0
    SYMATTR InstName R4
    SYMATTR Value 4.701Meg
    SYMBOL cap -528 928 R0
    SYMATTR InstName C3
    SYMATTR Value 0.68p
    SYMBOL cap -224 912 R0
    SYMATTR InstName C4
    SYMATTR Value 0.68p
    SYMBOL npn -128 640 R0
    SYMATTR InstName Q10
    SYMATTR Value 55GN01FA
    SYMBOL RES -256 576 R0
    WINDOW 3 30 76 Left 2
    SYMATTR Value 1Meg
    SYMATTR InstName R2
    SYMBOL RES -48 624 R180
    WINDOW 0 36 76 Left 2
    WINDOW 3 36 40 Left 2
    SYMATTR InstName R11
    SYMATTR Value 1Meg
    TEXT -768 1176 Left 0 !.tran 0 150u 50u startup
    TEXT -776 1112 Left 0 ;This example schematic is supplied for informational/educational purposes only.\nJuly 7, 2008 by Bill Sloman
    (but blame the Q10 output stage on James Arthur).
    TEXT -480 1176 Left 0 !.model 55GN01FA NPN\n+ IS = 959.8E-18 BF = 133.0 NF = 985.0E-3 VAF = 9.557\n+ IKF = 760.0E-3 ISE = 450.0E-15
    NE = 1.810 BR = 28.89\n+ NR = 1.013 VAR = 1.700 IKR = 5.849E-3 ISC = 1.299E-15\n+ NC = 1.157 RB = 1.000 IRB = 910.0E-3 RBM =
    910.0E-3\n+ RE = 510.0E-3 RC = 1.200 XTB = 0.000 EG = 1.110\n+ XTI = 3.000 CJE = 1.050E-12 VJE = 600.0E-3 MJE = 800.0E-3\n+ TF =
    18.00E-12 XTF = 1.000 VTF = 1.000 ITF = 50.00E-3\n+ PTF = 0.000 CJC = 800.0E-15 VJC = 110.0E-3 MJC = 115.0E-3\n+ XCJC = 500.0E-3 TR
    = 1.000E-9 FC = 500.0E-3
    TEXT -32 1128 Left 0 ;Q2's collector is loaded by C2,\nlimiting risetime. Q10 isolates\nQ1's collector, allowing that node\nto
    charge much more rapidly.\n \nQ10 doubles as a common-base\namplifier stage, further squaring up the\noutput from Q10's collector.\n
    \nThe new output is taken from\nQ10's collector.\n \nJames Arthur, 9-Jul-2008 >TEXT 208 696 Left 0 ;This circuit was originally\ndesigned by Bill Sloman and\nJames Arthur in 2008.\n \nThis circuit uses the
    55GN01FA\nUsing a model which was derived\nfrom information found online\nby Edward Rawde in June 2024\n \nOh and exactly why do I
    have\nto press Shift+Enter to write\nthis? Talk about frustration.\n \nMore importantly, there are\nno four way net crossovers\nwith
    a single blob (Q10 base)\n \nFrequency of oscillation appears\nto be 117 KHz. Slightly lower than\nthe BFR92A which is obsolete.







    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to bitrex on Sat Jun 15 08:47:19 2024
    On Sat, 15 Jun 2024 00:47:00 -0400, bitrex <user@example.net> wrote:

    On 6/14/2024 7:10 PM, john larkin wrote:
    On Fri, 14 Jun 2024 16:35:59 -0400, bitrex <user@example.net> wrote:

    On 6/14/2024 12:33 PM, john larkin wrote:
    On Fri, 14 Jun 2024 12:18:23 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message news:8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com...
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>>>>> It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!



    There's no reason to use many-GHz parts in micropower circuits. One >>>>>>>> reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.

    If it's obsolete or going obsolete then yes it would make no sense to use it.
    I would guess that you get to do plenty of work because a manufacturer has suddenly decided to discontinue a part.

    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets >>>>>> around, but the monolithic arrays are mostly gone.

    What part would you recommend (single or dual) and does it have a working LTSpice model?

    Just pull up some parts from the standard library, some low current
    NPNs like BC547 maybe. Look for low capacitances if you care about
    that; the HFAs are good in that respect.

    Why do people avoid making clean 4-wire connections on schematics?

    There's this new trend of breaking the circuit schematic up into little
    boxes like this, it's nuts:

    <https://hackaday.com/wp-content/uploads/2024/05/hadimg_desrev_ltc4040_6.png>



    That's criminal.


    Combining schematics and documentation in the same document is sort of
    like a toothpaste and orange juice smoothie. I like orange juice, and >toothpaste is useful. However...

    We keep a separate design notes folder. It can say a lot more than
    could be hacked onto a schematic. I don't like a lot of comments on my schematics.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Phil Hobbs@21:1/5 to john larkin on Sat Jun 15 16:03:21 2024
    john larkin <jl@650pot.com> wrote:
    On Sat, 15 Jun 2024 00:47:00 -0400, bitrex <user@example.net> wrote:

    On 6/14/2024 7:10 PM, john larkin wrote:
    On Fri, 14 Jun 2024 16:35:59 -0400, bitrex <user@example.net> wrote:

    On 6/14/2024 12:33 PM, john larkin wrote:
    On Fri, 14 Jun 2024 12:18:23 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "john larkin" <jl@650pot.com> wrote in message
    news:8epo6jhf5k5nbkkqp5ot9b6nq1lhoia870@4ax.com...
    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message
    news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message
    news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using >>>>>>>>>>> Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>>>>>> It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!



    There's no reason to use many-GHz parts in micropower circuits. One >>>>>>>>> reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.

    If it's obsolete or going obsolete then yes it would make no sense to use it.
    I would guess that you get to do plenty of work because a
    manufacturer has suddenly decided to discontinue a part.

    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets >>>>>>> around, but the monolithic arrays are mostly gone.

    What part would you recommend (single or dual) and does it have a
    working LTSpice model?

    Just pull up some parts from the standard library, some low current
    NPNs like BC547 maybe. Look for low capacitances if you care about
    that; the HFAs are good in that respect.

    Why do people avoid making clean 4-wire connections on schematics?

    There's this new trend of breaking the circuit schematic up into little >>>> boxes like this, it's nuts:

    <https://hackaday.com/wp-content/uploads/2024/05/hadimg_desrev_ltc4040_6.png>



    That's criminal.


    Combining schematics and documentation in the same document is sort of
    like a toothpaste and orange juice smoothie. I like orange juice, and
    toothpaste is useful. However...

    We keep a separate design notes folder. It can say a lot more than
    could be hacked onto a schematic. I don't like a lot of comments on my schematics.



    I often annotate schematics with things like nominal voltages, dashed rectangles to indicate circuit groups, and anything unusual that might be mistaken for an error, such as a BJT used upside-down.

    Makes it easier for others to understand.

    (We also keep notes, markups from bringup, and so on. )

    Cheers

    Phil Hobbs

    --
    Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to legg on Sat Jun 15 12:23:58 2024
    "legg" <legg@nospam.magma.ca> wrote in message news:m95r6jhkg2t0ivj4rcgommqljvb5v4ihhd@4ax.com...
    On Fri, 14 Jun 2024 09:03:03 -0700, john larkin <jl@650pot.com> wrote:

    On Fri, 14 Jun 2024 11:08:56 -0400, "Edward Rawde" >><invalid@invalid.invalid> wrote:


    "john larkin" <jl@650pot.com> wrote in message news:hilo6j9dgctalpiu4v09rpdavf6fetm1cv@4ax.com...
    On Thu, 13 Jun 2024 23:25:37 -0400, "Edward Rawde"
    <invalid@invalid.invalid> wrote:

    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4f2nm$2augj$1@dont-email.me...
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his
    mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216


    I put the NPN model parameters into a circuit designed by yourself. >>>>>It's late now but I got as far as Time step too small.


    That is neither fast nor a monostable.

    Yes ok it's an astable and certainly not intended to be fast.
    It was intended only to see if the model worked. Nothing more.

    It doesn't work!

    Actually it does, see below.




    There's no reason to use many-GHz parts in micropower circuits. One
    reason is that the sim breaks.

    Most versions of the HFA3046 are obsolete. The only one left at
    Digikey costs $12. It would be risky to design around that part.
    Wasn't HFA originally a Harris part?

    There are lots of dual (non-monolithic) diodes and bipolars and fets >>around, but the monolithic arrays are mostly gone.

    The duals save space, but aren't well matched so are electrically and >>thermally equivalent to buying two separate parts.

    I wonder if one could design really fast stuff with the HFA3046.
    Package parasitics look nasty. And the big package will force ugly PCB >>routing. You can plop a single tiny transistor wherever you want.

    The HFA parts are either 5 NPNs or 5 PNPs, which is also awkward.




    The original simulation of the astable multivibrator was intended
    to demonstrate reasonable speed at low power.

    Yes. It's not hard to find the original posts online.


    The model was published by Intersil in 1996 in app note MM3046.

    The simulation runs if properly typeset.

    Thanks for pointing that out. You're absolutely right. Here is the corrected version.
    As usual, line breaks will need to be fixed.


    RL

    Version 4
    SHEET 1 2848 1316
    WIRE -592 512 -752 512
    WIRE -240 512 -592 512
    WIRE -64 512 -240 512
    WIRE 32 512 -64 512
    WIRE -64 528 -64 512
    WIRE 32 528 32 512
    WIRE -592 560 -592 512
    WIRE -240 560 -240 512
    WIRE -752 624 -752 512
    WIRE -64 624 -64 608
    WIRE 192 624 -64 624
    WIRE 208 624 192 624
    WIRE -64 640 -64 624
    WIRE -240 688 -240 640
    WIRE -128 688 -240 688
    WIRE -592 704 -592 640
    WIRE -464 704 -592 704
    WIRE -384 704 -464 704
    WIRE -240 704 -240 688
    WIRE -240 704 -320 704
    WIRE -464 736 -464 704
    WIRE -240 736 -240 704
    WIRE -64 768 -64 736
    WIRE 32 768 32 608
    WIRE 32 768 -64 768
    WIRE -592 832 -592 704
    WIRE 32 832 32 768
    WIRE -512 880 -528 880
    WIRE -464 880 -464 816
    WIRE -464 880 -512 880
    WIRE -448 880 -464 880
    WIRE -384 880 -320 704
    WIRE -320 880 -384 704
    WIRE -240 880 -240 816
    WIRE -240 880 -256 880
    WIRE -208 880 -240 880
    WIRE -32 880 -208 880
    WIRE -208 912 -208 880
    WIRE -512 928 -512 880
    WIRE -752 1008 -752 704
    WIRE -592 1008 -592 928
    WIRE -592 1008 -752 1008
    WIRE -512 1008 -512 992
    WIRE -512 1008 -592 1008
    WIRE -208 1008 -208 976
    WIRE -208 1008 -512 1008
    WIRE 32 1008 32 928
    WIRE 32 1008 -208 1008
    WIRE -752 1040 -752 1008
    FLAG -752 1040 0
    FLAG 192 624 out
    SYMBOL RES -608 544 R0
    SYMATTR InstName R1
    SYMATTR Value 1Meg
    SYMBOL res 16 512 R0
    SYMATTR InstName R10
    SYMATTR Value 2Meg
    SYMBOL cap -384 864 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C1
    SYMATTR Value 1.5p
    SYMBOL cap -256 864 R90
    WINDOW 0 0 32 VBottom 2
    WINDOW 3 32 32 VTop 2
    SYMATTR InstName C2
    SYMATTR Value 1.5p
    SYMBOL VOLTAGE -752 608 R0
    WINDOW 123 0 0 Left 0
    WINDOW 39 0 0 Left 0
    SYMATTR InstName V1
    SYMATTR Value 5
    SYMBOL npn -32 832 R0
    SYMATTR InstName Q1
    SYMATTR Value NUHFARRY
    SYMBOL npn -528 832 M0
    SYMATTR InstName Q2
    SYMATTR Value NUHFARRY
    SYMBOL res -256 720 R0
    SYMATTR InstName R3
    SYMATTR Value 4.7Meg
    SYMBOL res -480 720 R0
    SYMATTR InstName R4
    SYMATTR Value 4.701Meg
    SYMBOL cap -528 928 R0
    SYMATTR InstName C3
    SYMATTR Value 0.68p
    SYMBOL cap -224 912 R0
    SYMATTR InstName C4
    SYMATTR Value 0.68p
    SYMBOL npn -128 640 R0
    SYMATTR InstName Q10
    SYMATTR Value NUHFARRY
    SYMBOL RES -256 544 R0
    WINDOW 3 30 76 Left 2
    SYMATTR Value 1Meg
    SYMATTR InstName R2
    SYMBOL RES -48 624 R180
    WINDOW 0 36 76 Left 2
    WINDOW 3 36 40 Left 2
    SYMATTR InstName R11
    SYMATTR Value 1Meg
    TEXT -768 1176 Left 0 !.tran 0 150u 50u startup
    TEXT -776 1112 Left 0 ;This example schematic is supplied for informational/educational purposes only.\nJuly 7, 2008 by Bill Sloman
    (but blame the Q10 output stage on James Arthur).
    TEXT -480 1176 Left 0 !.model NUHFARRY NPN\n+ (IS = 1.840E-16 XTI = 3.000E+00 EG = 1.110E+00 VAF = 7.200E+01\n+ VAR = 4.500E+00 BF =
    1.036E+02 ISE = 1.686E-19 NE = 1.400E+00\n+ IKF = 5.400E-02 XTB = 0.000E+00 BR = 1.000E+01 ISC=1.605E-14\n+ NC = 1.800E+00 IKR =
    5.400E-02 RC = 1.140E+01 CJC = 3.980E-13\n+ MJC = 2.400E-01 VJC = 9.700E-01 FC = 5.000E-01 CJE = 2.400E-13\n+ MJE = 5.100E-01 VJE =
    8.690E-01 TR = 4.000E-09 TF = 10.51E-12\n+ ITF = 3.500E-02 XTF = 2.300E+00 VTF = 3.500E+00 PTF = 0.000E+00\n+ XCJC = 9.000E-01 CJS =
    1.150E-13 VJS = 7.500E-01 MJS = 0.000E+00\n+ RE = 1.848E+00 RB = 5.007E+01 RBM = 1.974E+00 KF = 0.000E+00\n+ AF = 1.000E+00)
    TEXT -32 1128 Left 0 ;Q2's collector is loaded by C2,\nlimiting risetime. Q10 isolates\nQ1's collector, allowing that node\nto
    charge much more rapidly.\n \nQ10 doubles as a common-base\namplifier stage, further squaring up the\noutput from Q10's collector.\n
    \nThe new output is taken from\nQ10's collector.\n \nJames Arthur, 9-Jul-2008 TEXT 128 680 Left 0 ;This circuit was originally\ndesigned by Bill Sloman and\nJames Arthur in 2008.\n \nThis version uses the
    55GN01FA HFA3046/3096/3127/3128\nTransistor Array SPICE Models taken from\nRenesas Application Note MM3046\nRev.1.00\nFebruary
    1994\nCopy/paste by Edward Rawde in June 2024.\nRemove spaces in exponents. E.g. BF = 1.036E+02\n \nFrequency of oscillation is 95
    KHz

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Bill Sloman@21:1/5 to Bill Sloman on Tue Jun 18 18:44:37 2024
    On 14/06/2024 1:20 am, Bill Sloman wrote:
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his mononstable and level
    shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216

    Two of the NPN parts could make up my emitter-coupled monostable, and
    the two PNP parts could level shift the output.

    The Renesas website offers Spice models for both the NPN and the PNP transistors, which one could plug into an LTSpice simulation, at the
    cost of making it look too messy for the more sensitive designers to be
    able to look at.

    I've spent that last four days in hospital with Covid-19 of the colon - dramatic when it started but tedious thereafter.

    This thread hasn't gone all that well. John Larkin has ignored the fact
    that I was talking about just the 3096. There have been some sensible
    comments, but I'm still too sick to try and provide any kind of summing
    up of the sensible bits.

    --
    Bill Sloman, Sydney


    --
    This email has been checked for viruses by Norton antivirus software. www.norton.com

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to All on Tue Jun 18 06:36:41 2024
    On Tue, 18 Jun 2024 18:44:37 +1000, Bill Sloman <bill.sloman@ieee.org>
    wrote:

    On 14/06/2024 1:20 am, Bill Sloman wrote:
    One option John Larjkin doesn't seem to have explored is using Renesas
    HFA3096 five transistor array as basis for his mononstable and level
    shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array. >>
    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216

    Two of the NPN parts could make up my emitter-coupled monostable, and
    the two PNP parts could level shift the output.

    The Renesas website offers Spice models for both the NPN and the PNP
    transistors, which one could plug into an LTSpice simulation, at the
    cost of making it look too messy for the more sensitive designers to be
    able to look at.

    I've spent that last four days in hospital with Covid-19 of the colon - >dramatic when it started but tedious thereafter.

    This thread hasn't gone all that well. John Larkin has ignored the fact
    that I was talking about just the 3096. There have been some sensible >comments, but I'm still too sick to try and provide any kind of summing
    up of the sensible bits.

    --
    Bill Sloman, Sydney

    OK, we can defer discussing your one-shot circuit until you feel
    better. I've had some medical adventures of my own.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From piglet@21:1/5 to john larkin on Tue Jun 18 13:48:58 2024
    john larkin <jl@650pot.com> wrote:
    On Tue, 18 Jun 2024 18:44:37 +1000, Bill Sloman <bill.sloman@ieee.org>
    wrote:

    On 14/06/2024 1:20 am, Bill Sloman wrote:
    One option John Larjkin doesn't seem to have explored is using Renesas
    HFA3096 five transistor array as basis for his mononstable and level
    shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array. >>>
    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216

    Two of the NPN parts could make up my emitter-coupled monostable, and
    the two PNP parts could level shift the output.

    The Renesas website offers Spice models for both the NPN and the PNP
    transistors, which one could plug into an LTSpice simulation, at the
    cost of making it look too messy for the more sensitive designers to be
    able to look at.

    I've spent that last four days in hospital with Covid-19 of the colon -
    dramatic when it started but tedious thereafter.

    This thread hasn't gone all that well. John Larkin has ignored the fact
    that I was talking about just the 3096. There have been some sensible
    comments, but I'm still too sick to try and provide any kind of summing
    up of the sensible bits.

    --
    Bill Sloman, Sydney

    OK, we can defer discussing your one-shot circuit until you feel
    better. I've had some medical adventures of my own.



    My sympathies to both of you, coincidentally I am just getting back on my
    feet after an eight day common cold from hell (was not Covid)


    --
    piglet

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Edward Rawde@21:1/5 to Bill Sloman on Tue Jun 18 10:32:33 2024
    "Bill Sloman" <bill.sloman@ieee.org> wrote in message news:v4rheb$18s4m$1@dont-email.me...
    On 14/06/2024 1:20 am, Bill Sloman wrote:
    One option John Larjkin doesn't seem to have explored is using Renesas HFA3096 five transistor array as basis for his mononstable
    and level shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array. >>
    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216

    Two of the NPN parts could make up my emitter-coupled monostable, and the two PNP parts could level shift the output.

    The Renesas website offers Spice models for both the NPN and the PNP transistors, which one could plug into an LTSpice
    simulation, at the cost of making it look too messy for the more sensitive designers to be able to look at.

    I've spent that last four days in hospital with Covid-19 of the colon - dramatic when it started but tedious thereafter.

    I thought you'd gone a bit quiet.
    I hope you get fully recovered quickly.

    It's been about two years since I had Covid.
    All I noticed was loss of sense of smell and a cold but different variants affect different people differently.


    This thread hasn't gone all that well. John Larkin has ignored the fact that I was talking about just the 3096. There have been
    some sensible comments, but I'm still too sick to try and provide any kind of summing up of the sensible bits.

    --
    Bill Sloman, Sydney


    --
    This email has been checked for viruses by Norton antivirus software. www.norton.com

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to erichpwagner@hotmail.com on Tue Jun 18 08:28:55 2024
    On Tue, 18 Jun 2024 13:48:58 -0000 (UTC), piglet
    <erichpwagner@hotmail.com> wrote:

    john larkin <jl@650pot.com> wrote:
    On Tue, 18 Jun 2024 18:44:37 +1000, Bill Sloman <bill.sloman@ieee.org>
    wrote:

    On 14/06/2024 1:20 am, Bill Sloman wrote:
    One option John Larjkin doesn't seem to have explored is using Renesas >>>> HFA3096 five transistor array as basis for his mononstable and level
    shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array. >>>>
    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216

    Two of the NPN parts could make up my emitter-coupled monostable, and
    the two PNP parts could level shift the output.

    The Renesas website offers Spice models for both the NPN and the PNP
    transistors, which one could plug into an LTSpice simulation, at the
    cost of making it look too messy for the more sensitive designers to be >>>> able to look at.

    I've spent that last four days in hospital with Covid-19 of the colon -
    dramatic when it started but tedious thereafter.

    This thread hasn't gone all that well. John Larkin has ignored the fact
    that I was talking about just the 3096. There have been some sensible
    comments, but I'm still too sick to try and provide any kind of summing
    up of the sensible bits.

    --
    Bill Sloman, Sydney

    OK, we can defer discussing your one-shot circuit until you feel
    better. I've had some medical adventures of my own.



    My sympathies to both of you, coincidentally I am just getting back on my >feet after an eight day common cold from hell (was not Covid)

    I'm now wearing a 24-hour recording EKG thing. It's really no trouble
    at all. Pretty cool technology.

    It's a pity that there is no low-drama equivalent for blood pressure.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Bill Sloman@21:1/5 to john larkin on Wed Jun 19 20:17:41 2024
    On 19/06/2024 1:28 am, john larkin wrote:
    On Tue, 18 Jun 2024 13:48:58 -0000 (UTC), piglet
    <erichpwagner@hotmail.com> wrote:

    john larkin <jl@650pot.com> wrote:
    On Tue, 18 Jun 2024 18:44:37 +1000, Bill Sloman <bill.sloman@ieee.org>
    wrote:

    On 14/06/2024 1:20 am, Bill Sloman wrote:
    One option John Larjkin doesn't seem to have explored is using Renesas >>>>> HFA3096 five transistor array as basis for his mononstable and level >>>>> shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216

    Two of the NPN parts could make up my emitter-coupled monostable, and >>>>> the two PNP parts could level shift the output.

    The Renesas website offers Spice models for both the NPN and the PNP >>>>> transistors, which one could plug into an LTSpice simulation, at the >>>>> cost of making it look too messy for the more sensitive designers to be >>>>> able to look at.

    I've spent that last four days in hospital with Covid-19 of the colon - >>>> dramatic when it started but tedious thereafter.

    This thread hasn't gone all that well. John Larkin has ignored the fact >>>> that I was talking about just the 3096. There have been some sensible
    comments, but I'm still too sick to try and provide any kind of summing >>>> up of the sensible bits.

    --
    Bill Sloman, Sydney

    OK, we can defer discussing your one-shot circuit until you feel
    better. I've had some medical adventures of my own.

    My sympathies to both of you, coincidentally I am just getting back on my
    feet after an eight day common cold from hell (was not Covid)

    I'm now wearing a 24-hour recording EKG thing. It's really no trouble
    at all. Pretty cool technology.

    And they have been around for at least thirty years. My mother got stuck
    with being a guineau pig for one some thirty years ago.

    It's a pity that there is no low-drama equivalent for blood pressure
    You do have to compress the upper arm.

    --
    Bill Sloman, Sydney



    --
    This email has been checked for viruses by Norton antivirus software. www.norton.com

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Chris Jones@21:1/5 to Bill Sloman on Sun Jun 23 22:29:40 2024
    On 19/06/2024 8:17 pm, Bill Sloman wrote:
    On 19/06/2024 1:28 am, john larkin wrote:
    On Tue, 18 Jun 2024 13:48:58 -0000 (UTC), piglet
    <erichpwagner@hotmail.com> wrote:

    john larkin <jl@650pot.com> wrote:
    On Tue, 18 Jun 2024 18:44:37 +1000, Bill Sloman <bill.sloman@ieee.org> >>>> wrote:

    On 14/06/2024 1:20 am, Bill Sloman wrote:
    One option John Larjkin doesn't seem to have explored is using
    Renesas
    HFA3096 five transistor array as basis for his mononstable and level >>>>>> shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a
    single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216

    Two of the NPN parts could make up my emitter-coupled monostable, and >>>>>> the two PNP parts could level shift the output.

    The Renesas website offers Spice models for both the NPN and the PNP >>>>>> transistors, which one could plug into an LTSpice simulation, at the >>>>>> cost of making it look too messy for the more sensitive designers
    to be
    able to look at.

    I've spent that last four days in hospital with Covid-19 of the
    colon -
    dramatic when it started but tedious thereafter.

    This thread hasn't gone all that well. John Larkin has ignored the
    fact
    that I was talking about just the 3096. There have been some sensible >>>>> comments, but I'm still too sick to try and provide any kind of
    summing
    up of the sensible bits.

    --
    Bill Sloman, Sydney

    OK, we can defer discussing your one-shot circuit until you feel
    better. I've had some medical adventures of my own.

    My sympathies to both of you, coincidentally I am just getting back
    on my
    feet after an eight day common cold from hell (was not Covid)

    I'm now wearing a 24-hour recording EKG thing. It's really no trouble
    at all. Pretty cool technology.

    And they have been around for at least thirty years. My mother got stuck
    with being a guineau pig for one some thirty years ago.

    It's a pity that there is no low-drama equivalent for blood pressure
    You do have to compress the upper arm.


    FYI if you want to avoid getting covid again, it appears to be pretty
    much exclusively airborne, so you probably won't get infected if you
    (and your family if any) wear a respirator that fits you well, every
    time you are indoors with people not from your household.

    To know whether the respirator fits you, you can do a DIY fit-test with
    a handheld nebuliser from a pharmacy, which you put a strong-tasting
    solution such as 3M FT-32 which you can buy from RS components. You
    breathe in through your mouth with your tongue slightly out, whilst
    surrounding the outside of the respirator with the bitter fog, and if
    the resporator leaks, you will taste it. Generally you will need to wear
    one with headloops and not earloops in order to pass. A 3M Aura is a
    good one to try - most people can get it to pass the test.

    I haven't been sick at all since 2019, unless you count hangovers or
    headaches from staying up too late. The main downside is that I can't
    eat inside restaurants, so I order take-away instead. That seems like a
    good deal to me, but others have different priorities from which I will
    not attempt to dissuade them at present.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From john larkin@21:1/5 to lugnut808@spam.yahoo.com on Sun Jun 23 06:16:17 2024
    On Sun, 23 Jun 2024 22:29:40 +1000, Chris Jones
    <lugnut808@spam.yahoo.com> wrote:

    On 19/06/2024 8:17 pm, Bill Sloman wrote:
    On 19/06/2024 1:28 am, john larkin wrote:
    On Tue, 18 Jun 2024 13:48:58 -0000 (UTC), piglet
    <erichpwagner@hotmail.com> wrote:

    john larkin <jl@650pot.com> wrote:
    On Tue, 18 Jun 2024 18:44:37 +1000, Bill Sloman <bill.sloman@ieee.org> >>>>> wrote:

    On 14/06/2024 1:20 am, Bill Sloman wrote:
    One option John Larjkin doesn't seem to have explored is using
    Renesas
    HFA3096 five transistor array as basis for his mononstable and level >>>>>>> shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a
    single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216

    Two of the NPN parts could make up my emitter-coupled monostable, and >>>>>>> the two PNP parts could level shift the output.

    The Renesas website offers Spice models for both the NPN and the PNP >>>>>>> transistors, which one could plug into an LTSpice simulation, at the >>>>>>> cost of making it look too messy for the more sensitive designers >>>>>>> to be
    able to look at.

    I've spent that last four days in hospital with Covid-19 of the
    colon -
    dramatic when it started but tedious thereafter.

    This thread hasn't gone all that well. John Larkin has ignored the >>>>>> fact
    that I was talking about just the 3096. There have been some sensible >>>>>> comments, but I'm still too sick to try and provide any kind of
    summing
    up of the sensible bits.

    --
    Bill Sloman, Sydney

    OK, we can defer discussing your one-shot circuit until you feel
    better. I've had some medical adventures of my own.

    My sympathies to both of you, coincidentally I am just getting back
    on my
    feet after an eight day common cold from hell (was not Covid)

    I'm now wearing a 24-hour recording EKG thing. It's really no trouble
    at all. Pretty cool technology.

    And they have been around for at least thirty years. My mother got stuck
    with being a guineau pig for one some thirty years ago.

    It's a pity that there is no low-drama equivalent for blood pressure
    You do have to compress the upper arm.


    FYI if you want to avoid getting covid again, it appears to be pretty
    much exclusively airborne, so you probably won't get infected if you
    (and your family if any) wear a respirator that fits you well, every
    time you are indoors with people not from your household.

    To know whether the respirator fits you, you can do a DIY fit-test with
    a handheld nebuliser from a pharmacy, which you put a strong-tasting
    solution such as 3M FT-32 which you can buy from RS components. You
    breathe in through your mouth with your tongue slightly out, whilst >surrounding the outside of the respirator with the bitter fog, and if
    the resporator leaks, you will taste it. Generally you will need to wear
    one with headloops and not earloops in order to pass. A 3M Aura is a
    good one to try - most people can get it to pass the test.

    I haven't been sick at all since 2019, unless you count hangovers or >headaches from staying up too late. The main downside is that I can't
    eat inside restaurants, so I order take-away instead. That seems like a
    good deal to me, but others have different priorities from which I will
    not attempt to dissuade them at present.


    A Buzz Lightyear sort of full biohazard suit would be safer.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Bill Sloman@21:1/5 to Chris Jones on Mon Jun 24 12:48:21 2024
    On 23/06/2024 10:29 pm, Chris Jones wrote:
    On 19/06/2024 8:17 pm, Bill Sloman wrote:
    On 19/06/2024 1:28 am, john larkin wrote:
    On Tue, 18 Jun 2024 13:48:58 -0000 (UTC), piglet
    <erichpwagner@hotmail.com> wrote:

    john larkin <jl@650pot.com> wrote:
    On Tue, 18 Jun 2024 18:44:37 +1000, Bill Sloman <bill.sloman@ieee.org> >>>>> wrote:

    On 14/06/2024 1:20 am, Bill Sloman wrote:
    One option John Larjkin doesn't seem to have explored is using
    Renesas
    HFA3096 five transistor array as basis for his mononstable and level >>>>>>> shifter.

    It offers three 8GHz NPN parts and two 5.5GHz PNP parts in a
    single array.

    https://www.renesas.com/us/en/document/dst/hfa3046-hfa3096-hfa3127-hfa3128-datasheet?r=494216

    Two of the NPN parts could make up my emitter-coupled monostable, >>>>>>> and
    the two PNP parts could level shift the output.

    The Renesas website offers Spice models for both the NPN and the PNP >>>>>>> transistors, which one could plug into an LTSpice simulation, at the >>>>>>> cost of making it look too messy for the more sensitive designers >>>>>>> to be
    able to look at.

    I've spent that last four days in hospital with Covid-19 of the
    colon -
    dramatic when it started but tedious thereafter.

    This thread hasn't gone all that well. John Larkin has ignored the >>>>>> fact
    that I was talking about just the 3096. There have been some sensible >>>>>> comments, but I'm still too sick to try and provide any kind of
    summing
    up of the sensible bits.

    --
    Bill Sloman, Sydney

    OK, we can defer discussing your one-shot circuit until you feel
    better. I've had some medical adventures of my own.

    My sympathies to both of you, coincidentally I am just getting back
    on my
    feet after an eight day common cold from hell (was not Covid)

    I'm now wearing a 24-hour recording EKG thing. It's really no trouble
    at all. Pretty cool technology.

    And they have been around for at least thirty years. My mother got
    stuck with being a guineau pig for one some thirty years ago.

    It's a pity that there is no low-drama equivalent for blood pressure
    You do have to compress the upper arm.


    FYI if you want to avoid getting covid again, it appears to be pretty
    much exclusively airborne, so you probably won't get infected if you
    (and your family if any) wear a respirator that fits you well, every
    time you are indoors with people not from your household
    The best way of not getting Covid is to get vaccinated against it, and
    I've done that in spades. Wearing a face mask cuts the odds even further.

    I probably got infected at my brother's house, when I was having dinner
    there with his wife and a cousin from half-way across Australia. My
    grand-niece who showed up briefly during the evening was the most likely
    vector - she's certainly infected her grandmother in the last couple of
    years.

    Getting paranoid about getting infected isn't a realistic option.

    <snip>

    I haven't been sick at all since 2019, unless you count hangovers or headaches from staying up too late. The main downside is that I can't
    eat inside restaurants, so I order take-away instead. That seems like a
    good deal to me, but others have different priorities from which I will
    not attempt to dissuade them at present.

    This was my first dose of Covid. Because it got to my gut, it was fairly dramatic, and somewhat debilitating, but it looks as if I'm going to
    survive.

    --
    Bill Sloman


    --
    This email has been checked for viruses by Norton antivirus software. www.norton.com

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)