https://www.dropbox.com/s/627ifxuw3rsexj2/EP11_Oscillator.jpg?raw=1 Wonder how that will work. I'll have one of my people try it. It would certainly work with a fast comparator with hysteresis. -- I yam what I yam - Popeye
eclips oscillator
Started by ●February 2, 2022
Reply by ●February 2, 20222022-02-02
On 2/2/2022 11:53 AM, jlarkin@highlandsniptechnology.com wrote:> https://www.dropbox.com/s/627ifxuw3rsexj2/EP11_Oscillator.jpg?raw=1 > > Wonder how that will work. I'll have one of my people try it. > > It would certainly work with a fast comparator with hysteresis. > >ECL seems well-suited to generating sines also, as it kinda has a soft-limiting "tanh-shaper" built into it to begin with Old timey NOR-gate: <https://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/ECL.svg/350px-ECL.svg.png> bias it into class C with a negative voltage below Vee on the inputs and connect an LC back to the input from not-Q and I think it should sing. For 1+ GHz maybe some trace inductance and an inter-digital capacitor would be enough. <https://www.mouser.com/ProductDetail/onsemi/MC100LVEL01DR2G?qs=zorda86t5M9xivhmK851Lw%3D%3D>
Reply by ●February 2, 20222022-02-02
On 2/2/2022 1:28 PM, bitrex wrote:> On 2/2/2022 11:53 AM, jlarkin@highlandsniptechnology.com wrote: >> https://www.dropbox.com/s/627ifxuw3rsexj2/EP11_Oscillator.jpg?raw=1 >> >> Wonder how that will work. I'll have one of my people try it. >> >> It would certainly work with a fast comparator with hysteresis. >> >> > > ECL seems well-suited to generating sines also, as it kinda has a > soft-limiting "tanh-shaper" built into it to begin with > > Old timey NOR-gate: > > <https://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/ECL.svg/350px-ECL.svg.png> > > > bias it into class C with a negative voltage below Vee on the inputs and > connect an LC back to the inputSeries LC to be specific if that wasn't clear
Reply by ●February 2, 20222022-02-02
On Wed, 2 Feb 2022 13:28:51 -0500, bitrex <user@example.net> wrote:>On 2/2/2022 11:53 AM, jlarkin@highlandsniptechnology.com wrote: >> https://www.dropbox.com/s/627ifxuw3rsexj2/EP11_Oscillator.jpg?raw=1 >> >> Wonder how that will work. I'll have one of my people try it. >> >> It would certainly work with a fast comparator with hysteresis. >> >> > >ECL seems well-suited to generating sines also, as it kinda has a >soft-limiting "tanh-shaper" built into it to begin with > >Old timey NOR-gate: > ><https://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/ECL.svg/350px-ECL.svg.png> > >bias it into class C with a negative voltage below Vee on the inputs and >connect an LC back to the input from not-Q and I think it should sing. >For 1+ GHz maybe some trace inductance and an inter-digital capacitor >would be enough. > ><https://www.mouser.com/ProductDetail/onsemi/MC100LVEL01DR2G?qs=zorda86t5M9xivhmK851Lw%3D%3D> > >The old 10K parts had low gain and could be used as linear amplifiers. The EL and EP gates have a lot more gain, so have harder edges. -- John Larkin Highland Technology, Inc trk The cork popped merrily, and Lord Peter rose to his feet. "Bunter", he said, "I give you a toast. The triumph of Instinct over Reason"
Reply by ●February 2, 20222022-02-02
onsdag den 2. februar 2022 kl. 23.07.13 UTC+1 skrev John Larkin:> On Wed, 2 Feb 2022 13:28:51 -0500, bitrex <us...@example.net> wrote: > > >On 2/2/2022 11:53 AM, jla...@highlandsniptechnology.com wrote: > >> https://www.dropbox.com/s/627ifxuw3rsexj2/EP11_Oscillator.jpg?raw=1 > >> > >> Wonder how that will work. I'll have one of my people try it. > >> > >> It would certainly work with a fast comparator with hysteresis. > >> > >> > > > >ECL seems well-suited to generating sines also, as it kinda has a > >soft-limiting "tanh-shaper" built into it to begin with > > > >Old timey NOR-gate: > > > ><https://upload.wikimedia.org/wikipedia/commons/thumb/b/b2/ECL.svg/350px-ECL.svg.png> > > > >bias it into class C with a negative voltage below Vee on the inputs and > >connect an LC back to the input from not-Q and I think it should sing. > >For 1+ GHz maybe some trace inductance and an inter-digital capacitor > >would be enough. > > > ><https://www.mouser.com/ProductDetail/onsemi/MC100LVEL01DR2G?qs=zorda86t5M9xivhmK851Lw%3D%3D> > > > > > The old 10K parts had low gain and could be used as linear amplifiers. > The EL and EP gates have a lot more gain, so have harder edges.https://shrubbery.net/~heas/willem/PDF/NSC/AN/AN-88.pdf
Reply by ●February 4, 20222022-02-04
On Wed, 02 Feb 2022 08:53:27 -0800, jlarkin@highlandsniptechnology.com wrote:>https://www.dropbox.com/s/627ifxuw3rsexj2/EP11_Oscillator.jpg?raw=1 > >Wonder how that will work. I'll have one of my people try it.Oscillates at 1.5 GHz, reasonable square wave, bad tempco. Can be tuned down maybe 20% with C2. There are tons of "clock generator" chips. Some are actually just buffers or dividers. Some are very complex synthesizers. Most are unavailable. -- John Larkin Highland Technology, Inc trk The cork popped merrily, and Lord Peter rose to his feet. "Bunter", he said, "I give you a toast. The triumph of Instinct over Reason"
Reply by ●February 7, 20222022-02-07
On Wed, 02 Feb 2022 08:53:27 -0800, jlarkin@highlandsniptechnology.com wrote:>https://www.dropbox.com/s/627ifxuw3rsexj2/EP11_Oscillator.jpg?raw=1 > >Wonder how that will work. I'll have one of my people try it. > >It would certainly work with a fast comparator with hysteresis.This should work. https://www.dropbox.com/s/chgyy2kvj6ye5gq/Osc_EP11_LC1.jpg?raw=1 -- I yam what I yam - Popeye
Reply by ●February 8, 20222022-02-08
jlarkin@highlandsniptechnology.com wrote:> On Wed, 02 Feb 2022 08:53:27 -0800, jlarkin@highlandsniptechnology.com > wrote: > >> https://www.dropbox.com/s/627ifxuw3rsexj2/EP11_Oscillator.jpg?raw=1 >> >> Wonder how that will work. I'll have one of my people try it. >> >> It would certainly work with a fast comparator with hysteresis. > > This should work. > > https://www.dropbox.com/s/chgyy2kvj6ye5gq/Osc_EP11_LC1.jpg?raw=1 > > > >That looks similar to the late Jim Thompson's MC1648. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC / Hobbs ElectroOptics Optics, Electro-optics, Photonics, Analog Electronics Briarcliff Manor NY 10510 http://electrooptical.net http://hobbs-eo.com
Reply by ●February 8, 20222022-02-08
On Monday, February 7, 2022 at 6:56:15 PM UTC-8, jla...@highlandsniptechnology.com wrote:> This should work. > > https://www.dropbox.com/s/chgyy2kvj6ye5gq/Osc_EP11_LC1.jpg?raw=1Substituting a tapped inductor (drive the tap, sense/resonate the endpoint) would improve the slew rate. Tapped inductor is a gain boost, and the chip has input clamps.
Reply by ●February 8, 20222022-02-08
On Tuesday, February 8, 2022 at 4:38:58 PM UTC+11, Phil Hobbs wrote:> jla...@highlandsniptechnology.com wrote: > > On Wed, 02 Feb 2022 08:53:27 -0800, jla...@highlandsniptechnology.com > > wrote: > > > >> https://www.dropbox.com/s/627ifxuw3rsexj2/EP11_Oscillator.jpg?raw=1 > >> > >> Wonder how that will work. I'll have one of my people try it. > >> > >> It would certainly work with a fast comparator with hysteresis. > > > > This should work. > > > > https://www.dropbox.com/s/chgyy2kvj6ye5gq/Osc_EP11_LC1.jpg?raw=1 > > > That looks similar to the late Jim Thompson's MC1648.The MC1648 is remarkably old. The Motorala - ON Semiconductor - ECLinPS parts go back to the 1990's,, and the MC1648 shows up in the 1973 <https://doc.lagout.org/science/0_Computer%20Science/0_Computer%20History/old-hardware/motorola/_dataBooks/Motorola_Phase-Locked_Loop_Systems_Data_Book_2ed_Aug73.pdf> The topology may be similar, but the transistors are going to be a lot smaller that the ones Jim designed in. -- Bill Sloman, Sydney
