Retro TGM8 with TMC, Laterals and 80db OLG @ 20 KHz

[gannaji]

Dear friends,

There was a thread by Nico Ras, (6) Another thread regarding CCS vs BOOTSTRAP | diyAudio . There was a lot of discussion about CCS vs Bootstrapping. In post https://www.diyaudio.com/community/...egarding-ccs-vs-bootstrap.134046/post-1674672 , MJL21193 suggested “We need a compromise Nico - a bootstrapped CCS!”

I remember that Dadod used it in his GEM amplifier. Also, Hugh used it in his Fetzilla. I used Hugh’s idea in my latest iteration, in toto.

When I checked the distortion products, the FFT @ 1 KHz is as below. Not very useful. Hence, I used 10 KHz for all further FFT plots.

I take this opportunity to thank dear minek, whose file of models I used extensively.

 

[gannaji]

The schematics used by me to evaluate the Phase and gain margins is attached below. The .asc file should run easily, thanks to minek123. Thanks to Bimo for the tian scheme. Just typing tian() in the add traces window should be sufficient.

 

[gannaji]

The schematics used by me to evaluate distortion, overload behavior and square wave response are as below.
The dis curves are shown for 10 KHz and 16 Volts pk-pk, as this will provide ~16 watts output power. The clipping is at +/- 20 volts, pk-pk.