[sdiy] (easy) resonant filter

[>>>marjan<<<]

Hi there,

> linearity, a perfectly clean signal, or anything really.  I just want
> to experiment with filter design and I need a starting place.  I've
> looked around and all the schematics for filters I find require some
> sort of CEM chip.

Try some of these simple ccts, SVF with few opamps, replace the
pots with vactrols if you need VC:

http://hem1.passagen.se/robin2/im/whawha.gif
http://hem1.passagen.se/robin2/im/whawha2.gif
http://hem1.passagen.se/robin2/im/dualfil.gif
http://hem1.passagen.se/robin2/im/dualfim.gif
-- 



marjan


me    : Marjan Urekar
e-mail: urekar.m at eunet.yu
s-diy : http://surf.to/marjansystems
music : http://go.to/forcemajeure