SBG-PID

[dbanner]

Someone who is not able to explain technical information on his own circuit and give such a poor excuse.
probably he thinks I am not worthy of such information, never mind the other members of the forum who might be interested, I am beginner, otherwise I could do my own calculations on integrator stage.
Wow! That's pretty insightful.
I prefer to think that the real reason is your English is very poor(math is however, a universal language), and you speak just in the same way in which you draw your schematic diagrams(confusing, obfuscating babble). I don't blame you for not trying to elaborate on your little circuit. INTEGRATOR and MOTION AMPLIFIER will do.

[dbanner]

Here is how the TDI purportedly does ground balance

TX on for 100us
TX off, enter flyback
first sample delay 10us, take the Target sample
At the end of the Target sample, wait a short delay, take the GB sample
At the end of the GB sample, wait a long delay, take the two EF samples
Use a diff integrator to subtract Target-EF1
Use another diff integrator to subtract GB-EF2
Subtract A1*(Target-EF1) - A2*(GB-EF2)
Adjust A2 for ground balance

[dbanner]

Maybe you would like to explain how your SBG-PID does ground balance? Since your second sample is in the typical EF sample region.

[Andi68]

Someone who is not able to explain technical information on his own circuit and give such a poor excuse.
probably he thinks I am not worthy of such information, never mind the other members of the forum who might be interested, I am beginner, otherwise I could do my own calculations on integrator stage.
Wow! That's pretty insightful.
I prefer to think that the real reason is your English is very poor(math is however, a universal language), and you speak just in the same way in which you draw your schematic diagrams(confusing, obfuscating babble). I don't blame you for not trying to elaborate on your little circuit. INTEGRATOR and MOTION AMPLIFIER will do.

I fully agree with you, dbanner

[DonCaffeDelaSkobalj]

Hey all

Why do you spend money and life time on totaly unuseful project - Bulgarian Sand Banks ? I am out of text.

Wanna know how to make good, stabile design, deep searching MD with GB and auto FB desaturation circuit, study or better build some of best Pi in the world already posted at this forum.

But what for example?

All projects of Mr.Irishman Eric Foster and also from German EE which made original Pulse Star. There are also several interesting Russian projects and original Zed's SD2000.
Bets way to make superb MD is first make one same like original, then modify it according to your needs. All other projects including Bulgarian clones whatever PI or VLF are pettite string beans.

That's all.
Good luck

[dbanner]

Irishman?, I always thought Ferric Toes was Welshman or Englishman.

[Carl-NC]

U3a, U3b(OP1a, OP1b) topology little strange for PI. Can someone describe integrator stage?

It's a bandpass integrator, I don't think I've seen this used before. It is called a "multiple feedback bandpass filter," lots on info on the Internet. Be careful with opamp selection, the 20M feedback demands ultra low IB.

This serves the same function as an SAT stage after the integrator but with the advantage that large offsets won't rail out the integrator. A disadvantage is that you cannot clamp negative signals, commonly done in PI-GB designs. Actually, I say that without really thinking about it, maybe you can.

Also U4b(OP2) is unity gain inverting amp, overall effect is inverting integrator on one path and non inverting on the other path, correct? Discrim(meter) and GB pots for summing?

Since one side is inverted, the pot output is a subtraction. That's why there is an inverter.

[dbanner]

Thanks Carl.

[dbanner]

Hey all

Why do you spend money and life time on totaly unuseful project - Bulgarian Sand Banks ? I am out of text.

Wanna know how to make good, stabile design, deep searching MD with GB and auto FB desaturation circuit, study or better build some of best Pi in the world already posted at this forum.

But what for example?

All projects of Mr.Irishman Eric Foster and also from German EE which made original Pulse Star. There are also several interesting Russian projects and original Zed's SD2000.
Bets way to make superb MD is first make one same like original, then modify it according to your needs. All other projects including Bulgarian clones whatever PI or VLF are pettite string beans.

That's all.
Good luck

Bulgarian Sandbanks

It was the unusual integrators which got my attention.
SCS does not strike me as a daft individual just out to peddle his little circuits around the place. No, no, quite the contrary, this man very well knows his stuff. I suspect there is a whole lot more hidden under the surface of this little iceberg.
He probably has a very much more advanced design he keeps for himself, what he posted here was the baby version.

[dbanner]

Or maybe he's an old crank, just fiddling around with vacuum tube amplifiers. Never programmed a micro in his life. An old analog man who's past his prime.
I hope he has a sense of humor.

[scs]

For your information, my profession is related to machine programming. There are many people with wooden heads here ...

[scs]

I really know bad English. Why not learn Bulgarian?

[dbanner]

Edited

[dbanner]

I really know bad English. Why not learn Bulgarian?

Ah, Master Jedi, I have provoked you out of your long slumber!
Please explain your integrators, how they work. you can say in Bulgarian, no problem. I will use translator.

[dbanner]

Edited