Slone amp final solution ?

[R Dijk]

Here in this circiut you are using vas current feedback. Taken into account the high open loop gain bouth termal feedback and current feedback may not bee "suffissient". Thou how many amps du you fint having a vas current within +/- 10% , here 9mA +/- 1mA (?)

If you want current loading input and current feedback here is one idea
https://www.diyaudio.com/community/...etrical-mosfet-amp.211837/page-2#post-3012651
Here there is a common mode feedback as well.

 

[R Dijk]

Hi Ricardo,

We distinguish two kind of currents in case of a complementary VAS stage: the sum of the two collector (or emitter) currents (i.e. common mode) and the difference of them (i.e. differential mode). The latter, being the signal, is supplied to the next stage.

Regarding your current solution, please also have a look at this post about tradeoffs between open loop gain and amount of feedback (by mens of Rfb) to define/stabilize the common mode current.

Cheers, E.

I played with Ricardos and here without values, Ricardo or you can play with.