state var RC mismatch

[Martin Czech]

> >I concentrate on the RC mismatch, because precise 1% resistors
> >are not critical today, whereas caps still are.
> 
> The Wima FKP2 polypropylene capacitors have only 2,5% tolerance. They aren't particularly expensive either. I use them for almost all my needs in the range from 100p to 33 n.
> 

Ah, yes. Good idea!

But off course the RC product can be upset by other error, too.
Eg. OTA mismatch. It doesn't really matter if R or C are "out of spec".

m.c.