Qubert current feedback amplifier

[Stee]

as you know
my line design is low feedback system

 

[godfrey]

very low feedback weight

How do you weigh the feedback?

btw, Is this circuit named "Qubert" as in the thread title, or "Qbert" as shown on the picture?

 

[Stee]

i prefer Qubert

if you simulate the circuit
measure the open loop gain (without NFB)
then connect NFB resistor (2K2)
measure the closed loop gain
the difference is the weight

now the gain setted is more then natural ---> 1:100 means 40dB
so the weight result 2 or 3dB
that sounds much better then zero feedback

 

[Bigun]

with zero feedback you aren't going to have a as low an output impedance so how it sounds might be somewhat speaker dependent.

 

[mcd99]

as you know
my line design is low feedback system

And diamond buffers. I like your alternative approach to circuit design.

 

[Stee]

Thanks mcd99uk
about speaker dependent (Bigun)
you can see my patent about engine's compensation system
Amplificatori bilanciati, il meglio dell'audio.