On 9/22/2021 1:27 PM, John Larkin wrote:> On Tue, 21 Sep 2021 21:28:43 -0400, bitrex <user@example.net> wrote: > >> On 9/21/2021 9:10 PM, Anthony William Sloman wrote: >>> On Wednesday, September 22, 2021 at 2:16:41 AM UTC+10, jla...@highlandsniptechnology.com wrote: >>>> On Mon, 20 Sep 2021 17:45:12 -0400, bitrex <us...@example.net> wrote: >>>>> Is it possible to take your standard Baxandall and tap the capacitor, >>>>> take an aux winding off the secondary and feed a somewhat higher DC >>>>> voltage to the cap (through the usual two-diode supply handoff >>>>> arrangement), and use it to feed the gate drive to the transistors as >>>>> well, which would be clocked rather than self-oscillating. >>>>> >>>>> The goal would be to have a quiet step-up converter that could do say 5 >>>>> to ~150 in one step, or maybe with a single multiplier stage. That seems >>>>> hard to do with anything off the shelf as compact pulse transformers >>>>> with the appropriate turns ratio don't seem to be really available, you >>>>> get into CFL-type transformers whose ratios are too large, but there >>>>> might be something appropriate with a third winding to bootstrap the >>>>> primary swing >>>> Here is a sine oscillator. >>>> >>>> https://www.dropbox.com/s/wqygdxrcr2egxsv/AGC_Sine_Osc.jpg?raw-1 >>>> >>>> The output amplitude is very stable with time and temperature. The >>>> voltage at the collector is reliably 2xV+ p-p. >>>> >>>> I invented this when I was a kid, still in college. It was used in the >>>> Boresight Alignment Kit for the C5A. >>> >>> For a rather undemanding understanding of "very stable". None of Vbe, saturation Vce, and current gain aren't all that stable. >>> >>> Seriously stable stuff demodulates the output - carefully - compares it with a good quality voltage reference and twiddles the loop gain to keep the output amplitude where you want it >>> >> >> For high step-ups at low powers with isolation I like the idea of an >> isolated Cuk too. Not as quiet as driving sines, but has the benefit of >> a continuous input current. And the transformer turns ratio doesn't need >> to be large to get a large step-up so off-the-shelf components should be >> easy to find. >> >> Lots of variations of the non-isolated Cuk online but seemingly not as >> much about the isolated kind. >> > > What Sloman can't understand, he insults. That happens a lot. >Guys, are you doing OK: <https://youtu.be/S1xxcKCGljY?t=64>
Turbo Royer/Baxandall in boost configuration
Started by ●September 20, 2021
Reply by ●September 22, 20212021-09-22
Reply by ●September 22, 20212021-09-22
On 9/22/2021 1:27 PM, John Larkin wrote:> On Tue, 21 Sep 2021 21:28:43 -0400, bitrex <user@example.net> wrote: > >> On 9/21/2021 9:10 PM, Anthony William Sloman wrote: >>> On Wednesday, September 22, 2021 at 2:16:41 AM UTC+10, jla...@highlandsniptechnology.com wrote: >>>> On Mon, 20 Sep 2021 17:45:12 -0400, bitrex <us...@example.net> wrote: >>>>> Is it possible to take your standard Baxandall and tap the capacitor, >>>>> take an aux winding off the secondary and feed a somewhat higher DC >>>>> voltage to the cap (through the usual two-diode supply handoff >>>>> arrangement), and use it to feed the gate drive to the transistors as >>>>> well, which would be clocked rather than self-oscillating. >>>>> >>>>> The goal would be to have a quiet step-up converter that could do say 5 >>>>> to ~150 in one step, or maybe with a single multiplier stage. That seems >>>>> hard to do with anything off the shelf as compact pulse transformers >>>>> with the appropriate turns ratio don't seem to be really available, you >>>>> get into CFL-type transformers whose ratios are too large, but there >>>>> might be something appropriate with a third winding to bootstrap the >>>>> primary swing >>>> Here is a sine oscillator. >>>> >>>> https://www.dropbox.com/s/wqygdxrcr2egxsv/AGC_Sine_Osc.jpg?raw-1 >>>> >>>> The output amplitude is very stable with time and temperature. The >>>> voltage at the collector is reliably 2xV+ p-p. >>>> >>>> I invented this when I was a kid, still in college. It was used in the >>>> Boresight Alignment Kit for the C5A. >>> >>> For a rather undemanding understanding of "very stable". None of Vbe, saturation Vce, and current gain aren't all that stable. >>> >>> Seriously stable stuff demodulates the output - carefully - compares it with a good quality voltage reference and twiddles the loop gain to keep the output amplitude where you want it >>> >> >> For high step-ups at low powers with isolation I like the idea of an >> isolated Cuk too. Not as quiet as driving sines, but has the benefit of >> a continuous input current. And the transformer turns ratio doesn't need >> to be large to get a large step-up so off-the-shelf components should be >> easy to find. >> >> Lots of variations of the non-isolated Cuk online but seemingly not as >> much about the isolated kind. >> > > What Sloman can't understand, he insults. That happens a lot. >FWIW idk what the big deal is, it doesn't seem a lot like that AM radio circuit exactly. All one-transistor xfmr oscillator circuits bear some similarity to each other, and I have a paper somewhere showing that in essence they're all fundamentally equivalent but some are easier to optimize for some characteristic than others.
Reply by ●September 22, 20212021-09-22
> If you want to compare an older stone tools and animal hide version > to the newer part simulations, you can fool with this one, which > uses the LTC version of jellybean UC3842 and self-driven mosfet > synchronous rectification. > > http://ve3ute.ca/query/active_clamp_forward_syncrec_sim.zip > > It illustrates all of the issues of control limits, dead-time, > leakage,stability (chaotic attractors) etc etc etc, when applied > to the forward topology. > > The self-driven syncrec was notorious for self-oscillation on > application of voltage to it's output terminals (ie no input > power applied). Could be good, could be bad, depending on what > you want it to do . . . > > It's always important to establish environmental design goals > and limits, when working with any topology. None will do everything, > but some can have distinct cost and performance advantages in > specific applications, at specific times in history. > > Some older articles: > > http://ve3ute.ca/query/active_clamp_-_switched_snubber_articles.zip > > Don't forget also - this is a simulation and so are those for models > supplied by vendors of newer control chips. > > RLI am having trouble opening those zip files... In my application, synchronous rectification is not an option; the secondary is a separate, existing module. The leakage inductance is relatively large and unpredictable, which is what led me to try the active clamp forward. And for bitrex's application, since output voltage is high and current is low, synchronous rectification seems unnecessary.
Reply by ●September 22, 20212021-09-22
On Wed, 22 Sep 2021 17:08:51 -0400, bitrex <user@example.net> wrote:>On 9/22/2021 1:27 PM, John Larkin wrote: >> On Tue, 21 Sep 2021 21:28:43 -0400, bitrex <user@example.net> wrote: >> >>> On 9/21/2021 9:10 PM, Anthony William Sloman wrote: >>>> On Wednesday, September 22, 2021 at 2:16:41 AM UTC+10, jla...@highlandsniptechnology.com wrote: >>>>> On Mon, 20 Sep 2021 17:45:12 -0400, bitrex <us...@example.net> wrote: >>>>>> Is it possible to take your standard Baxandall and tap the capacitor, >>>>>> take an aux winding off the secondary and feed a somewhat higher DC >>>>>> voltage to the cap (through the usual two-diode supply handoff >>>>>> arrangement), and use it to feed the gate drive to the transistors as >>>>>> well, which would be clocked rather than self-oscillating. >>>>>> >>>>>> The goal would be to have a quiet step-up converter that could do say 5 >>>>>> to ~150 in one step, or maybe with a single multiplier stage. That seems >>>>>> hard to do with anything off the shelf as compact pulse transformers >>>>>> with the appropriate turns ratio don't seem to be really available, you >>>>>> get into CFL-type transformers whose ratios are too large, but there >>>>>> might be something appropriate with a third winding to bootstrap the >>>>>> primary swing >>>>> Here is a sine oscillator. >>>>> >>>>> https://www.dropbox.com/s/wqygdxrcr2egxsv/AGC_Sine_Osc.jpg?raw-1 >>>>> >>>>> The output amplitude is very stable with time and temperature. The >>>>> voltage at the collector is reliably 2xV+ p-p. >>>>> >>>>> I invented this when I was a kid, still in college. It was used in the >>>>> Boresight Alignment Kit for the C5A. >>>> >>>> For a rather undemanding understanding of "very stable". None of Vbe, saturation Vce, and current gain aren't all that stable. >>>> >>>> Seriously stable stuff demodulates the output - carefully - compares it with a good quality voltage reference and twiddles the loop gain to keep the output amplitude where you want it >>>> >>> >>> For high step-ups at low powers with isolation I like the idea of an >>> isolated Cuk too. Not as quiet as driving sines, but has the benefit of >>> a continuous input current. And the transformer turns ratio doesn't need >>> to be large to get a large step-up so off-the-shelf components should be >>> easy to find. >>> >>> Lots of variations of the non-isolated Cuk online but seemingly not as >>> much about the isolated kind. >>> >> >> What Sloman can't understand, he insults. That happens a lot. >> > >Guys, are you doing OK: > ><https://youtu.be/S1xxcKCGljY?t=64>Wow. So many people are so maladjusted to being what they are. -- Father Brown's figure remained quite dark and still; but in that instant he had lost his head. His head was always most valuable when he had lost it.
Reply by ●September 22, 20212021-09-22
On Wed, 22 Sep 2021 17:18:55 -0400, bitrex <user@example.net> wrote:>On 9/22/2021 1:27 PM, John Larkin wrote: >> On Tue, 21 Sep 2021 21:28:43 -0400, bitrex <user@example.net> wrote: >> >>> On 9/21/2021 9:10 PM, Anthony William Sloman wrote: >>>> On Wednesday, September 22, 2021 at 2:16:41 AM UTC+10, jla...@highlandsniptechnology.com wrote: >>>>> On Mon, 20 Sep 2021 17:45:12 -0400, bitrex <us...@example.net> wrote: >>>>>> Is it possible to take your standard Baxandall and tap the capacitor, >>>>>> take an aux winding off the secondary and feed a somewhat higher DC >>>>>> voltage to the cap (through the usual two-diode supply handoff >>>>>> arrangement), and use it to feed the gate drive to the transistors as >>>>>> well, which would be clocked rather than self-oscillating. >>>>>> >>>>>> The goal would be to have a quiet step-up converter that could do say 5 >>>>>> to ~150 in one step, or maybe with a single multiplier stage. That seems >>>>>> hard to do with anything off the shelf as compact pulse transformers >>>>>> with the appropriate turns ratio don't seem to be really available, you >>>>>> get into CFL-type transformers whose ratios are too large, but there >>>>>> might be something appropriate with a third winding to bootstrap the >>>>>> primary swing >>>>> Here is a sine oscillator. >>>>> >>>>> https://www.dropbox.com/s/wqygdxrcr2egxsv/AGC_Sine_Osc.jpg?raw-1 >>>>> >>>>> The output amplitude is very stable with time and temperature. The >>>>> voltage at the collector is reliably 2xV+ p-p. >>>>> >>>>> I invented this when I was a kid, still in college. It was used in the >>>>> Boresight Alignment Kit for the C5A. >>>> >>>> For a rather undemanding understanding of "very stable". None of Vbe, saturation Vce, and current gain aren't all that stable. >>>> >>>> Seriously stable stuff demodulates the output - carefully - compares it with a good quality voltage reference and twiddles the loop gain to keep the output amplitude where you want it >>>> >>> >>> For high step-ups at low powers with isolation I like the idea of an >>> isolated Cuk too. Not as quiet as driving sines, but has the benefit of >>> a continuous input current. And the transformer turns ratio doesn't need >>> to be large to get a large step-up so off-the-shelf components should be >>> easy to find. >>> >>> Lots of variations of the non-isolated Cuk online but seemingly not as >>> much about the isolated kind. >>> >> >> What Sloman can't understand, he insults. That happens a lot. >> > >FWIW idk what the big deal is, it doesn't seem a lot like that AM radio >circuit exactly. All one-transistor xfmr oscillator circuits bear some >similarity to each other, and I have a paper somewhere showing that in >essence they're all fundamentally equivalent but some are easier to >optimize for some characteristic than others.(Imagine best engineer-geek western-cowboy Clint Eastwood accent:) The thing you gotta ask yourself, punk, is what's the collector current? -- Father Brown's figure remained quite dark and still; but in that instant he had lost his head. His head was always most valuable when he had lost it.
Reply by ●September 22, 20212021-09-22
On Wed, 22 Sep 2021 18:42:38 -0700 (PDT), sea moss <danluster81@gmail.com> wrote:>> If you want to compare an older stone tools and animal hide version >> to the newer part simulations, you can fool with this one, which >> uses the LTC version of jellybean UC3842 and self-driven mosfet >> synchronous rectification. >> >> http://ve3ute.ca/query/active_clamp_forward_syncrec_sim.zip >> >> It illustrates all of the issues of control limits, dead-time, >> leakage,stability (chaotic attractors) etc etc etc, when applied >> to the forward topology. >> >> The self-driven syncrec was notorious for self-oscillation on >> application of voltage to it's output terminals (ie no input >> power applied). Could be good, could be bad, depending on what >> you want it to do . . . >> >> It's always important to establish environmental design goals >> and limits, when working with any topology. None will do everything, >> but some can have distinct cost and performance advantages in >> specific applications, at specific times in history. >> >> Some older articles: >> >> http://ve3ute.ca/query/active_clamp_-_switched_snubber_articles.zip >> >> Don't forget also - this is a simulation and so are those for models >> supplied by vendors of newer control chips. >> >> RL > >I am having trouble opening those zip files...What are you using to open them? Winzip (free since forever) works.> >In my application, synchronous rectification is not an option; the secondary is a separate, existing module. The leakage inductance is relatively large and unpredictable, which is what led me to try the active clamp forward. And for bitrex's application, since output voltage is high and current is low, synchronous rectification seems unnecessary.Well, you can always dump it into a reservoir and recover it with anothere converter; use only as much energy in the clamp as you need for reset. Leakage energy is usually more than that. Better use flyback with active clamp instead, for energy recovery. Lower power handling capability, though. RL
Reply by ●September 23, 20212021-09-23
On 9/22/2021 10:25 PM, jlarkin@highlandsniptechnology.com wrote:> On Wed, 22 Sep 2021 17:08:51 -0400, bitrex <user@example.net> wrote: > >> On 9/22/2021 1:27 PM, John Larkin wrote: >>> On Tue, 21 Sep 2021 21:28:43 -0400, bitrex <user@example.net> wrote: >>> >>>> On 9/21/2021 9:10 PM, Anthony William Sloman wrote: >>>>> On Wednesday, September 22, 2021 at 2:16:41 AM UTC+10, jla...@highlandsniptechnology.com wrote: >>>>>> On Mon, 20 Sep 2021 17:45:12 -0400, bitrex <us...@example.net> wrote: >>>>>>> Is it possible to take your standard Baxandall and tap the capacitor, >>>>>>> take an aux winding off the secondary and feed a somewhat higher DC >>>>>>> voltage to the cap (through the usual two-diode supply handoff >>>>>>> arrangement), and use it to feed the gate drive to the transistors as >>>>>>> well, which would be clocked rather than self-oscillating. >>>>>>> >>>>>>> The goal would be to have a quiet step-up converter that could do say 5 >>>>>>> to ~150 in one step, or maybe with a single multiplier stage. That seems >>>>>>> hard to do with anything off the shelf as compact pulse transformers >>>>>>> with the appropriate turns ratio don't seem to be really available, you >>>>>>> get into CFL-type transformers whose ratios are too large, but there >>>>>>> might be something appropriate with a third winding to bootstrap the >>>>>>> primary swing >>>>>> Here is a sine oscillator. >>>>>> >>>>>> https://www.dropbox.com/s/wqygdxrcr2egxsv/AGC_Sine_Osc.jpg?raw-1 >>>>>> >>>>>> The output amplitude is very stable with time and temperature. The >>>>>> voltage at the collector is reliably 2xV+ p-p. >>>>>> >>>>>> I invented this when I was a kid, still in college. It was used in the >>>>>> Boresight Alignment Kit for the C5A. >>>>> >>>>> For a rather undemanding understanding of "very stable". None of Vbe, saturation Vce, and current gain aren't all that stable. >>>>> >>>>> Seriously stable stuff demodulates the output - carefully - compares it with a good quality voltage reference and twiddles the loop gain to keep the output amplitude where you want it >>>>> >>>> >>>> For high step-ups at low powers with isolation I like the idea of an >>>> isolated Cuk too. Not as quiet as driving sines, but has the benefit of >>>> a continuous input current. And the transformer turns ratio doesn't need >>>> to be large to get a large step-up so off-the-shelf components should be >>>> easy to find. >>>> >>>> Lots of variations of the non-isolated Cuk online but seemingly not as >>>> much about the isolated kind. >>>> >>> >>> What Sloman can't understand, he insults. That happens a lot. >>> >> >> Guys, are you doing OK: >> >> <https://youtu.be/S1xxcKCGljY?t=64> > > Wow. So many people are so maladjusted to being what they are. > >She's significantly more entertaining than the average SED poster is on the topic of politics
Reply by ●September 23, 20212021-09-23
On 9/22/2021 10:25 PM, jlarkin@highlandsniptechnology.com wrote:> On Wed, 22 Sep 2021 17:08:51 -0400, bitrex <user@example.net> wrote: > >> On 9/22/2021 1:27 PM, John Larkin wrote: >>> On Tue, 21 Sep 2021 21:28:43 -0400, bitrex <user@example.net> wrote: >>> >>>> On 9/21/2021 9:10 PM, Anthony William Sloman wrote: >>>>> On Wednesday, September 22, 2021 at 2:16:41 AM UTC+10, jla...@highlandsniptechnology.com wrote: >>>>>> On Mon, 20 Sep 2021 17:45:12 -0400, bitrex <us...@example.net> wrote: >>>>>>> Is it possible to take your standard Baxandall and tap the capacitor, >>>>>>> take an aux winding off the secondary and feed a somewhat higher DC >>>>>>> voltage to the cap (through the usual two-diode supply handoff >>>>>>> arrangement), and use it to feed the gate drive to the transistors as >>>>>>> well, which would be clocked rather than self-oscillating. >>>>>>> >>>>>>> The goal would be to have a quiet step-up converter that could do say 5 >>>>>>> to ~150 in one step, or maybe with a single multiplier stage. That seems >>>>>>> hard to do with anything off the shelf as compact pulse transformers >>>>>>> with the appropriate turns ratio don't seem to be really available, you >>>>>>> get into CFL-type transformers whose ratios are too large, but there >>>>>>> might be something appropriate with a third winding to bootstrap the >>>>>>> primary swing >>>>>> Here is a sine oscillator. >>>>>> >>>>>> https://www.dropbox.com/s/wqygdxrcr2egxsv/AGC_Sine_Osc.jpg?raw-1 >>>>>> >>>>>> The output amplitude is very stable with time and temperature. The >>>>>> voltage at the collector is reliably 2xV+ p-p. >>>>>> >>>>>> I invented this when I was a kid, still in college. It was used in the >>>>>> Boresight Alignment Kit for the C5A. >>>>> >>>>> For a rather undemanding understanding of "very stable". None of Vbe, saturation Vce, and current gain aren't all that stable. >>>>> >>>>> Seriously stable stuff demodulates the output - carefully - compares it with a good quality voltage reference and twiddles the loop gain to keep the output amplitude where you want it >>>>> >>>> >>>> For high step-ups at low powers with isolation I like the idea of an >>>> isolated Cuk too. Not as quiet as driving sines, but has the benefit of >>>> a continuous input current. And the transformer turns ratio doesn't need >>>> to be large to get a large step-up so off-the-shelf components should be >>>> easy to find. >>>> >>>> Lots of variations of the non-isolated Cuk online but seemingly not as >>>> much about the isolated kind. >>>> >>> >>> What Sloman can't understand, he insults. That happens a lot. >>> >> >> Guys, are you doing OK: >> >> <https://youtu.be/S1xxcKCGljY?t=64> > > Wow. So many people are so maladjusted to being what they are. > > >Why did Rome fall? Was it....THE GAYS?
Reply by ●September 23, 20212021-09-23
On Thursday, September 23, 2021 at 3:27:11 AM UTC+10, John Larkin wrote:> On Tue, 21 Sep 2021 21:28:43 -0400, bitrex <us...@example.net> wrote: > >On 9/21/2021 9:10 PM, Anthony William Sloman wrote: > >> On Wednesday, September 22, 2021 at 2:16:41 AM UTC+10, jla...@highlandsniptechnology.com wrote: > >>> On Mon, 20 Sep 2021 17:45:12 -0400, bitrex <us...@example.net> wrote: > >>>> Is it possible to take your standard Baxandall and tap the capacitor, > >>>> take an aux winding off the secondary and feed a somewhat higher DC > >>>> voltage to the cap (through the usual two-diode supply handoff > >>>> arrangement), and use it to feed the gate drive to the transistors as > >>>> well, which would be clocked rather than self-oscillating. > >>>> > >>>> The goal would be to have a quiet step-up converter that could do say 5 > >>>> to ~150 in one step, or maybe with a single multiplier stage. That seems > >>>> hard to do with anything off the shelf as compact pulse transformers > >>>> with the appropriate turns ratio don't seem to be really available, you > >>>> get into CFL-type transformers whose ratios are too large, but there > >>>> might be something appropriate with a third winding to bootstrap the > >>>> primary swing > >>> Here is a sine oscillator. > >>> > >>> https://www.dropbox.com/s/wqygdxrcr2egxsv/AGC_Sine_Osc.jpg?raw-1 > >>> > >>> The output amplitude is very stable with time and temperature. The > >>> voltage at the collector is reliably 2xV+ p-p. > >>> > >>> I invented this when I was a kid, still in college. It was used in the > >>> Boresight Alignment Kit for the C5A. > >> > >> For a rather undemanding understanding of "very stable". None of Vbe, saturation Vce, and current gain aren't all that stable. > >> > >> Seriously stable stuff demodulates the output - carefully - compares it with a good quality voltage reference and twiddles the loop gain to keep the output amplitude where you want it > > > >For high step-ups at low powers with isolation I like the idea of an > >isolated Cuk too. Not as quiet as driving sines, but has the benefit of > >a continuous input current. And the transformer turns ratio doesn't need > >to be large to get a large step-up so off-the-shelf components should be > >easy to find. > > > >Lots of variations of the non-isolated Cuk online but seemingly not as > >much about the isolated kind. > > > What Sloman can't understand, he insults. That happens a lot.John Larkin understands less than he imagines, and comforts himself with the idea that everybody else is equally crippled. He appended his comment to post by Bitrex. Curiously, Bitrex's comment about the Cuk inverter echos an element of the thread "Low noise, high bias voltage on picoAmp TIA's input, howto?" that started on the 21st May and ran until the 2nd July, which did include a little discussion of an an isolated Cuk-style - low ripple - inverter. I even posted a couple of .asc files of variations on the idea. John Larkin made exactly one contribution to the thread and it wasn't highly technical. -- Bill Sloman, Sydney
Reply by ●September 23, 20212021-09-23
On Thu, 23 Sep 2021 00:29:28 -0400, bitrex <user@example.net> wrote:>On 9/22/2021 10:25 PM, jlarkin@highlandsniptechnology.com wrote: >> On Wed, 22 Sep 2021 17:08:51 -0400, bitrex <user@example.net> wrote: >> >>> On 9/22/2021 1:27 PM, John Larkin wrote: >>>> On Tue, 21 Sep 2021 21:28:43 -0400, bitrex <user@example.net> wrote: >>>> >>>>> On 9/21/2021 9:10 PM, Anthony William Sloman wrote: >>>>>> On Wednesday, September 22, 2021 at 2:16:41 AM UTC+10, jla...@highlandsniptechnology.com wrote: >>>>>>> On Mon, 20 Sep 2021 17:45:12 -0400, bitrex <us...@example.net> wrote: >>>>>>>> Is it possible to take your standard Baxandall and tap the capacitor, >>>>>>>> take an aux winding off the secondary and feed a somewhat higher DC >>>>>>>> voltage to the cap (through the usual two-diode supply handoff >>>>>>>> arrangement), and use it to feed the gate drive to the transistors as >>>>>>>> well, which would be clocked rather than self-oscillating. >>>>>>>> >>>>>>>> The goal would be to have a quiet step-up converter that could do say 5 >>>>>>>> to ~150 in one step, or maybe with a single multiplier stage. That seems >>>>>>>> hard to do with anything off the shelf as compact pulse transformers >>>>>>>> with the appropriate turns ratio don't seem to be really available, you >>>>>>>> get into CFL-type transformers whose ratios are too large, but there >>>>>>>> might be something appropriate with a third winding to bootstrap the >>>>>>>> primary swing >>>>>>> Here is a sine oscillator. >>>>>>> >>>>>>> https://www.dropbox.com/s/wqygdxrcr2egxsv/AGC_Sine_Osc.jpg?raw-1 >>>>>>> >>>>>>> The output amplitude is very stable with time and temperature. The >>>>>>> voltage at the collector is reliably 2xV+ p-p. >>>>>>> >>>>>>> I invented this when I was a kid, still in college. It was used in the >>>>>>> Boresight Alignment Kit for the C5A. >>>>>> >>>>>> For a rather undemanding understanding of "very stable". None of Vbe, saturation Vce, and current gain aren't all that stable. >>>>>> >>>>>> Seriously stable stuff demodulates the output - carefully - compares it with a good quality voltage reference and twiddles the loop gain to keep the output amplitude where you want it >>>>>> >>>>> >>>>> For high step-ups at low powers with isolation I like the idea of an >>>>> isolated Cuk too. Not as quiet as driving sines, but has the benefit of >>>>> a continuous input current. And the transformer turns ratio doesn't need >>>>> to be large to get a large step-up so off-the-shelf components should be >>>>> easy to find. >>>>> >>>>> Lots of variations of the non-isolated Cuk online but seemingly not as >>>>> much about the isolated kind. >>>>> >>>> >>>> What Sloman can't understand, he insults. That happens a lot. >>>> >>> >>> Guys, are you doing OK: >>> >>> <https://youtu.be/S1xxcKCGljY?t=64> >> >> Wow. So many people are so maladjusted to being what they are. >> >> > >She's significantly more entertaining than the average SED poster is on >the topic of politicsBut she sucks at electronic design. -- Father Brown's figure remained quite dark and still; but in that instant he had lost his head. His head was always most valuable when he had lost it.
