[sdiy] SVF question

[Neil Johnson]

David G Dixon wrote:
> Sorry -- that came out kinda garbled.  The LP output feeds back, the
> "inverted" BP output dampens, and a bit of "non-inverted" BP output fed back
> keeps things self-oscillating nicely.
>
> If anybody's interested, I'm happy to send along a PDF of my schematic.
> Send me a PM.

Or take a look at my 3-pole SSM2164-based filter, which has a diode 
limiter in the LP feedback path, and a funky little network in the 
damping circuit to keep the amplitude in self-oscillation approximately 
constant up to around 16kHz.

http://www.milton.arachsys.com/nj71/index.php?menu=2&submenu=0&subsubmenu=1

Cheers
Neil
-- 
www.njohnson.co.uk