[sdiy] OPA604 anyone?

[uzs159 at uni-bonn.de]

Hello Jürgen and all,

"JH." schrieb:
> 
> > They have sometimes shown to be somewhat prone to oscillations.
> > Nothing that some carefully attached compensation caps couldn't cure
> > though.
> 
> I don't get that specific circuit stable with NE5534. (But no problem with
> TL080 or LM301).
> I guess I'll just buy a few 604's and see.

I had added some small cap and resistor to GND at the -input.
(Effectively faking a higher gain of a 0V input at high frequencies.) 
The 604 seemed not to be quite as easy as I am used to with unity gain
stable opamps. Maybe its phase margin is just smaller. 
 
Cheers,
 René