[sdiy] 4 Pole state-variable filters

[Theo]

Sounds interesting.
Is there a place on the web where I could find  EN Special Issue F, page 47
?

Thanks,
Theo


From: Ian Fritz <ijfritz at earthlink.net>

> In EN Special Issue F, page 47 (1986) Bernie did a fairly detailed
> examination of how to compensate op-amp phase shifts. This might help in
> improving performance of higher-order filters with feedback. Simple RC
> compensation certainly helped a lot in improving the 4-pole LP with
feedback.
>
>    Ian
>
>
>
> At 09:38 AM 2/11/2002, Grant Richter wrote:
> > > Bit of a disappointment as I expected a genius solution for the
> > > problematic feedback behavior from the mythical EN.
> >
> >A fair number of the people who contributed to Electronotes are now here
on
> >this list. Electronotes was written and published by enthusiasts, not
> >genius's (although some things got close ;^)
>