LFO Tony

[BJ]

>    Sure, try National's LM6132 or TI's TL2272

>    My latest circuit design for my company involved using a R-T-R op-amp,
> and I can tell you I learned a few things about designing with one of
> these things.  They do NOT like to drive low impedance inputs, nor do
> they like to drive high capacitive loads.  If either of these two
> situations are present, they'll self oscillate like you can't believe.
>    Generally if you can keep input impedance above 10K then you should be
> okay.  I also suggest putting in feedback capacitors to help maintain
> good phase response.
>    I'm not quite sure what you are trying to do with your circuit, so I'm
> not sure if I've given any good hints or not.  Hope it helped though.
> 
>    Tony

> -----------------------------------
> I can't drive (my Moog) 55!
> -----------------------------------
> Tony Clark -- clark at andrews.edu
> http://aupe.phys.andrews.edu/~clark
> -----------------------------------

Tanks Tony.
You are absolutely right in your conclusion on the use of Cmos OP amps.
Actually i use one of the OP amp's as integrator and the output looks
into a 100nF
used in a fedback loop.This morning i have solved the "can't belive
oscillation" with a 
220 ohm isolator/buffer on the output and a 10k pullup, also on the
output.
This performs very well.Some times just the 10k pullup are needed.
Without thoose, the amp oscillates like hell when they reach the gain of
+2.
The phase response are of no matter in this design, but i have raised
the impedance
from 8,2k to 12k as you suggested.
Are there any bipolars that can swing from rail to rail?Or fet's?
I havn't seen any!

Regards Björn J.