https://www.dropbox.com/scl/fi/agatzclr8pvr5470g6mc4/Phemt_One_Shot_1.jpg?rlkey=cwnx0qd7ajgnh8otf627x5lku&raw=1
Regular monostables are terribly slow. This one has low prop delay and
high rep-rate, if the sim is to be believed.
SAV541 is mostly specified as an RF part, but it's a dynamite switch.
I can post a link to the files if anybody wants to play with this. All
my values are first guesses, no math involved, and it works!
My SAV541 Spice model is a revision of Phil Hobbs' original.
Mini-Circuits is adamant that they will never provide Spice models, a
typical RF-bigot attitude.
https://www.dropbox.com/scl/fi/agatzclr8pvr5470g6mc4/Phemt_One_Shot_1.jpg?rlkey=cwnx0qd7ajgnh8otf627x5lku&raw=1
Regular monostables are terribly slow. This one has low prop delay and
high rep-rate, if the sim is to be believed.
SAV541 is mostly specified as an RF part, but it's a dynamite switch.
I can post a link to the files if anybody wants to play with this. All
my values are first guesses, no math involved, and it works!
My SAV541 Spice model is a revision of Phil Hobbs' original.
Mini-Circuits is adamant that they will never provide Spice models, a
typical RF-bigot attitude.
On 2024-05-15 12:47, John Larkin wrote:
https://www.dropbox.com/scl/fi/agatzclr8pvr5470g6mc4/Phemt_One_Shot_1.jpg?rlkey=cwnx0qd7ajgnh8otf627x5lku&raw=1
Regular monostables are terribly slow. This one has low prop delay and
high rep-rate, if the sim is to be believed.
SAV541 is mostly specified as an RF part, but it's a dynamite switch.
I can post a link to the files if anybody wants to play with this. All
my values are first guesses, no math involved, and it works!
My SAV541 Spice model is a revision of Phil Hobbs' original.
Mini-Circuits is adamant that they will never provide Spice models, a
typical RF-bigot attitude.
With a low-resistance drain load like that, you don't care too much
about the low drain impedance of the pHEMT. The old Avago ones were
around 160 ohms iirc. The transconductance is high enough (400
something ridiculous like that) that you get gobs of voltage gain even so.
Really really crappy for followers though!
Cheers
Phil Hobbs
John Larkin <jjSNIPlarkin@highNONOlandtechnology.com> wrote:
https://www.dropbox.com/scl/fi/agatzclr8pvr5470g6mc4/Phemt_One_Shot_1.jpg?rlkey=cwnx0qd7ajgnh8otf627x5lku&raw=1
Regular monostables are terribly slow. This one has low prop delay and
high rep-rate, if the sim is to be believed.
SAV541 is mostly specified as an RF part, but it's a dynamite switch.
I can post a link to the files if anybody wants to play with this. All
my values are first guesses, no math involved, and it works!
My SAV541 Spice model is a revision of Phil Hobbs' original.
Mini-Circuits is adamant that they will never provide Spice models, a
typical RF-bigot attitude.
Yay! Eccles-Jordan ride again.
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> wrote:
On 2024-05-15 12:47, John Larkin wrote:
https://www.dropbox.com/scl/fi/agatzclr8pvr5470g6mc4/Phemt_One_Shot_1.jpg?rlkey=cwnx0qd7ajgnh8otf627x5lku&raw=1
Regular monostables are terribly slow. This one has low prop delay and
high rep-rate, if the sim is to be believed.
SAV541 is mostly specified as an RF part, but it's a dynamite switch.
I can post a link to the files if anybody wants to play with this. All
my values are first guesses, no math involved, and it works!
My SAV541 Spice model is a revision of Phil Hobbs' original.
Mini-Circuits is adamant that they will never provide Spice models, a
typical RF-bigot attitude.
With a low-resistance drain load like that, you don't care too much
about the low drain impedance of the pHEMT. The old Avago ones were
around 160 ohms iirc. The transconductance is high enough (400
millimho or
something ridiculous like that) that you get gobs of voltage gain even so. >>
Really really crappy for followers though!
On Wed, 15 May 2024 22:46:27 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
John Larkin <jjSNIPlarkin@highNONOlandtechnology.com> wrote:
https://www.dropbox.com/scl/fi/agatzclr8pvr5470g6mc4/Phemt_One_Shot_1.jpg?rlkey=cwnx0qd7ajgnh8otf627x5lku&raw=1
Regular monostables are terribly slow. This one has low prop delay and
high rep-rate, if the sim is to be believed.
SAV541 is mostly specified as an RF part, but it's a dynamite switch.
I can post a link to the files if anybody wants to play with this. All
my values are first guesses, no math involved, and it works!
My SAV541 Spice model is a revision of Phil Hobbs' original.
Mini-Circuits is adamant that they will never provide Spice models, a
typical RF-bigot attitude.
Yay! Eccles-Jordan ride again.
1918!
I think that was a bistable. I don't know when the monostable was
invented.
People tend to roll eyes when I use one-shots in logic designs. I
can't see why.
On Wed, 15 May 2024 22:46:27 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
John Larkin <jjSNIPlarkin@highNONOlandtechnology.com> wrote:
https://www.dropbox.com/scl/fi/agatzclr8pvr5470g6mc4/Phemt_One_Shot_1.jpg?rlkey=cwnx0qd7ajgnh8otf627x5lku&raw=1
Regular monostables are terribly slow. This one has low prop delay and
high rep-rate, if the sim is to be believed.
SAV541 is mostly specified as an RF part, but it's a dynamite switch.
I can post a link to the files if anybody wants to play with this. All
my values are first guesses, no math involved, and it works!
My SAV541 Spice model is a revision of Phil Hobbs' original.
Mini-Circuits is adamant that they will never provide Spice models, a
typical RF-bigot attitude.
Yay! Eccles-Jordan ride again.
1918!
I think that was a bistable. I don't know when the monostable was > invented.
People tend to roll eyes when I use one-shots in logic designs. I
can't see why.
On 16/05/2024 11:15 am, John Larkin wrote:
On Wed, 15 May 2024 22:46:27 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
John Larkin <jjSNIPlarkin@highNONOlandtechnology.com> wrote:
https://www.dropbox.com/scl/fi/agatzclr8pvr5470g6mc4/Phemt_One_Shot_1.jpg?rlkey=cwnx0qd7ajgnh8otf627x5lku&raw=1
Regular monostables are terribly slow. This one has low prop delay and >>>> high rep-rate, if the sim is to be believed.
SAV541 is mostly specified as an RF part, but it's a dynamite switch.
I can post a link to the files if anybody wants to play with this. All >>>> my values are first guesses, no math involved, and it works!
My SAV541 Spice model is a revision of Phil Hobbs' original.
Mini-Circuits is adamant that they will never provide Spice models, a
typical RF-bigot attitude.
Yay! Eccles-Jordan ride again.
1918!
I think that was a bistable. I don't know when the monostable was > invented.
https://en.wikipedia.org/wiki/Multivibrator
has a two quotes from 1942 one from 1943 and two from 1949 which make it >clear that monostable had been invented by then. It sees it as a cut
down bistable, so Eccles-Jordan is probably a good name.
Since the first multivibrator circuit, the astable multivibrator
oscillator, was invented by Henri Abraham and Eugene Bloch during World
War I, it probably isn't the right name.
https://apps.dtic.mil/sti/tr/pdf/AD0410225.pdf
is a 1963 Ph.D. on the bistable circuit.
People tend to roll eyes when I use one-shots in logic designs. I
can't see why.
You can't trigger a one-shot immediately after it has been triggered,
and the pulse width you get can be reduced if you re-trigger it too soon >after it has generated it's pulse, when it hasn't entirely recovered.
On Fri, 17 May 2024 00:40:32 +1000, Bill Sloman <bill.sloman@ieee.org>
wrote:
On 16/05/2024 11:15 am, John Larkin wrote:
On Wed, 15 May 2024 22:46:27 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
John Larkin <jjSNIPlarkin@highNONOlandtechnology.com> wrote:
https://www.dropbox.com/scl/fi/agatzclr8pvr5470g6mc4/Phemt_One_Shot_1.jpg?rlkey=cwnx0qd7ajgnh8otf627x5lku&raw=1
Regular monostables are terribly slow. This one has low prop delay and >>>>> high rep-rate, if the sim is to be believed.
SAV541 is mostly specified as an RF part, but it's a dynamite switch. >>>>>
I can post a link to the files if anybody wants to play with this. All >>>>> my values are first guesses, no math involved, and it works!
My SAV541 Spice model is a revision of Phil Hobbs' original.
Mini-Circuits is adamant that they will never provide Spice models, a >>>>> typical RF-bigot attitude.
Yay! Eccles-Jordan ride again.
1918!
I think that was a bistable. I don't know when the monostable was >
invented.
https://en.wikipedia.org/wiki/Multivibrator
has a two quotes from 1942 one from 1943 and two from 1949 which make it >>clear that monostable had been invented by then. It sees it as a cut
down bistable, so Eccles-Jordan is probably a good name.
Since the first multivibrator circuit, the astable multivibrator >>oscillator, was invented by Henri Abraham and Eugene Bloch during World
War I, it probably isn't the right name.
https://apps.dtic.mil/sti/tr/pdf/AD0410225.pdf
is a 1963 Ph.D. on the bistable circuit.
People tend to roll eyes when I use one-shots in logic designs. I
can't see why.
You can't trigger a one-shot immediately after it has been triggered,
and the pulse width you get can be reduced if you re-trigger it too soon >>after it has generated it's pulse, when it hasn't entirely recovered.
The SN74123 retriggerable one-shot, and a Fairchild equivalent, are
over 50 years old.
And "it's" is not the possessive form. It's means "it is."
"John Larkin" <jjSNIPlarkin@highNONOlandtechnology.com> wrote in message >news:9qdc4jdovsm0rousj88ngtn2bj6env9l48@4ax.com...
On Fri, 17 May 2024 00:40:32 +1000, Bill Sloman <bill.sloman@ieee.org>
wrote:
On 16/05/2024 11:15 am, John Larkin wrote:
On Wed, 15 May 2024 22:46:27 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
John Larkin <jjSNIPlarkin@highNONOlandtechnology.com> wrote:
https://www.dropbox.com/scl/fi/agatzclr8pvr5470g6mc4/Phemt_One_Shot_1.jpg?rlkey=cwnx0qd7ajgnh8otf627x5lku&raw=1
Regular monostables are terribly slow. This one has low prop delay and >>>>>> high rep-rate, if the sim is to be believed.
SAV541 is mostly specified as an RF part, but it's a dynamite switch. >>>>>>
I can post a link to the files if anybody wants to play with this. All >>>>>> my values are first guesses, no math involved, and it works!
My SAV541 Spice model is a revision of Phil Hobbs' original.
Mini-Circuits is adamant that they will never provide Spice models, a >>>>>> typical RF-bigot attitude.
Yay! Eccles-Jordan ride again.
1918!
I think that was a bistable. I don't know when the monostable was >
invented.
https://en.wikipedia.org/wiki/Multivibrator
has a two quotes from 1942 one from 1943 and two from 1949 which make it >>>clear that monostable had been invented by then. It sees it as a cut
down bistable, so Eccles-Jordan is probably a good name.
Since the first multivibrator circuit, the astable multivibrator >>>oscillator, was invented by Henri Abraham and Eugene Bloch during World >>>War I, it probably isn't the right name.
https://apps.dtic.mil/sti/tr/pdf/AD0410225.pdf
is a 1963 Ph.D. on the bistable circuit.
People tend to roll eyes when I use one-shots in logic designs. I
can't see why.
You can't trigger a one-shot immediately after it has been triggered,
and the pulse width you get can be reduced if you re-trigger it too soon >>>after it has generated it's pulse, when it hasn't entirely recovered.
The SN74123 retriggerable one-shot, and a Fairchild equivalent, are
over 50 years old.
And "it's" is not the possessive form. It's means "it is."
But it can also mean "it has" and who cares anyway.
I often find, when typing fast, that I used the wrong form when I re read my >sentence.
I even typed dentence then and had to change the d.
On Fri, 17 May 2024 00:40:32 +1000, Bill Sloman <bill.sloman@ieee.org>
wrote:
On 16/05/2024 11:15 am, John Larkin wrote:
On Wed, 15 May 2024 22:46:27 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
John Larkin <jjSNIPlarkin@highNONOlandtechnology.com> wrote:
https://www.dropbox.com/scl/fi/agatzclr8pvr5470g6mc4/Phemt_One_Shot_1.jpg?rlkey=cwnx0qd7ajgnh8otf627x5lku&raw=1
Regular monostables are terribly slow. This one has low prop delay and >>>>> high rep-rate, if the sim is to be believed.
SAV541 is mostly specified as an RF part, but it's a dynamite switch. >>>>>
I can post a link to the files if anybody wants to play with this. All >>>>> my values are first guesses, no math involved, and it works!
My SAV541 Spice model is a revision of Phil Hobbs' original.
Mini-Circuits is adamant that they will never provide Spice models, a >>>>> typical RF-bigot attitude.
Yay! Eccles-Jordan ride again.
1918!
I think that was a bistable. I don't know when the monostable was > invented.
https://en.wikipedia.org/wiki/Multivibrator
has a two quotes from 1942 one from 1943 and two from 1949 which make it
clear that monostable had been invented by then. It sees it as a cut
down bistable, so Eccles-Jordan is probably a good name.
Since the first multivibrator circuit, the astable multivibrator
oscillator, was invented by Henri Abraham and Eugene Bloch during World
War I, it probably isn't the right name.
https://apps.dtic.mil/sti/tr/pdf/AD0410225.pdf
is a 1963 Ph.D. on the bistable circuit.
People tend to roll eyes when I use one-shots in logic designs. I
can't see why.
You can't trigger a one-shot immediately after it has been triggered,
and the pulse width you get can be reduced if you re-trigger it too soon
after it has generated it's pulse, when it hasn't entirely recovered.
The SN74123 retriggerable one-shot, and a Fairchild equivalent, are
over 50 years old.
And "it's" is not the possessive form. It's means "it is."
On Thu, 16 May 2024 16:41:15 -0400, "Edward Rawde"
<invalid@invalid.invalid> wrote:
"John Larkin" <jjSNIPlarkin@highNONOlandtechnology.com> wrote in message
news:9qdc4jdovsm0rousj88ngtn2bj6env9l48@4ax.com...
On Fri, 17 May 2024 00:40:32 +1000, Bill Sloman <bill.sloman@ieee.org>
wrote:
On 16/05/2024 11:15 am, John Larkin wrote:
On Wed, 15 May 2024 22:46:27 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
John Larkin <jjSNIPlarkin@highNONOlandtechnology.com> wrote:
https://www.dropbox.com/scl/fi/agatzclr8pvr5470g6mc4/Phemt_One_Shot_1.jpg?rlkey=cwnx0qd7ajgnh8otf627x5lku&raw=1
Regular monostables are terribly slow. This one has low prop delay and >>>>>>> high rep-rate, if the sim is to be believed.
SAV541 is mostly specified as an RF part, but it's a dynamite switch. >>>>>>>
I can post a link to the files if anybody wants to play with this. All >>>>>>> my values are first guesses, no math involved, and it works!
My SAV541 Spice model is a revision of Phil Hobbs' original.
Mini-Circuits is adamant that they will never provide Spice models, a >>>>>>> typical RF-bigot attitude.
Yay! Eccles-Jordan ride again.
1918!
I think that was a bistable. I don't know when the monostable was >
invented.
https://en.wikipedia.org/wiki/Multivibrator
has a two quotes from 1942 one from 1943 and two from 1949 which make it >>>> clear that monostable had been invented by then. It sees it as a cut
down bistable, so Eccles-Jordan is probably a good name.
Since the first multivibrator circuit, the astable multivibrator
oscillator, was invented by Henri Abraham and Eugene Bloch during World >>>> War I, it probably isn't the right name.
https://apps.dtic.mil/sti/tr/pdf/AD0410225.pdf
is a 1963 Ph.D. on the bistable circuit.
People tend to roll eyes when I use one-shots in logic designs. I
can't see why.
You can't trigger a one-shot immediately after it has been triggered,
and the pulse width you get can be reduced if you re-trigger it too soon >>>> after it has generated it's pulse, when it hasn't entirely recovered.
The SN74123 retriggerable one-shot, and a Fairchild equivalent, are
over 50 years old.
And "it's" is not the possessive form. It's means "it is."
But it can also mean "it has" and who cares anyway.
I often find, when typing fast, that I used the wrong form when I re read my >> sentence.
I even typed dentence then and had to change the d.
You've got to admit that his pompous lecture, about all the inherent
defects of one-shots, was amusing.
I tweaked my phemt one-shot a bit, just for fun. I might even have a
use for it.
https://www.dropbox.com/scl/fi/zoncsuiz2ifl30i1tw0cl/Phemt_One-shot_2.jpg?rlkey=z77hx5kkdpijmz5rs7ex63jq7&raw=1
One cool old circuit that predated ICs was the uni-shot, a single
transistor and three passives. It was used in model airplane r/c transmitters. One of the three passives was a joystick pot.
One cool old circuit that predated ICs was the uni-shot, a single
transistor and three passives. It was used in model airplane r/c transmitters. One of the three passives was a joystick pot.
On 16/05/2024 11:15 am, John Larkin wrote:
On Wed, 15 May 2024 22:46:27 -0000 (UTC), piglet
<erichpwagner@hotmail.com> wrote:
John Larkin <jjSNIPlarkin@highNONOlandtechnology.com> wrote:
https://www.dropbox.com/scl/fi/agatzclr8pvr5470g6mc4/Phemt_One_Shot_1.jpg?rlkey=cwnx0qd7ajgnh8otf627x5lku&raw=1
Regular monostables are terribly slow. This one has low prop delay and >>>> high rep-rate, if the sim is to be believed.
SAV541 is mostly specified as an RF part, but it's a dynamite switch.
I can post a link to the files if anybody wants to play with this. All >>>> my values are first guesses, no math involved, and it works!
My SAV541 Spice model is a revision of Phil Hobbs' original.
Mini-Circuits is adamant that they will never provide Spice models, a
typical RF-bigot attitude.
Yay! Eccles-Jordan ride again.
1918!
I think that was a bistable. I don't know when the monostable was >
invented.
https://en.wikipedia.org/wiki/Multivibrator
has a two quotes from 1942 one from 1943 and two from 1949 which make it clear that monostable had been invented by then. It sees it as a cut
down bistable, so Eccles-Jordan is probably a good name.
Since the first multivibrator circuit, the astable multivibrator
oscillator, was invented by Henri Abraham and Eugene Bloch during World
War I, it probably isn't the right name.
https://apps.dtic.mil/sti/tr/pdf/AD0410225.pdf
is a 1963 Ph.D. on the bistable circuit.
People tend to roll eyes when I use one-shots in logic designs. I
can't see why.
You can't trigger a one-shot immediately after it has been triggered,
and the pulse width you get can be reduced if you re-trigger it too soon after it has generated it's pulse, when it hasn't entirely recovered.
Using a properly terminated delay line to set the output pulse width
could reduce this uncertainty, but I've never done it.
Ghiggino, K.P., Phillips, D., and Sloman, A.W. "Nanosecond pulse stretcher",Journal of Physics E: Scientific Instruments, 12, 686-687
(1979).
just used two 5GHz wide-band transistors (BFT95) and was perfectly
horrible, but it did what Dave Phillips and Ken Ghiggino had wanted me
to give them, and Ken Ghiggino wrote it up rather badly, but I was able
to rework the short paper into a form that was publishable and looks
nice on Ken's CV.
The fact the laser pulses it was designed to detect arrived at a steady
20MHz meant that it's worst defect didn't matter.
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