Eeyore a écrit :

Fred Bartoli wrote:

Eeyore a écrit :
Fred Bartoli wrote
Eeyore a écrit :
Winfield Hill wrote:

It's nice to see the diff-pair currents going directly to
the output opamp, with it's 6.8k resistors. But why'd ya
steal away loop gain so aggressively by choosing 680-ohms?
It doesn't. The + and - op-amp input nodes see almost no differential ac signal
voltage due to feedback action.

Hence no-need for active loading either. The 680Rs simply set the DC condition.
Win wasn't speaking about this. Well, you've splendidly succeeded in
reducing the loop gain by a 1:11 factor.
Come on then. Let's see your explanation.

And you need more explanation than what Win and I said for such an
elementary matter?
ROFL!

Ok, if we really have to spell it.
What's the opamp feedback loop made with?

I'm not playing any silly guessing game with you.

Explain yourself or shut up.


There's no guessing at all there and that you still don't see it is
quite eloquent about your abilities.

I just can hear what 'the other Fred' would have to say about this :-)


--
Thanks,
Fred.