[sdiy] State Variable Filter self oscillation

[Scott Juskiw]

At 7:41 PM -0800 2003/04/01, John Blacet wrote:
>Has anyone built a classic state variable that can oscillate?
>
>I have a few versions of this filter that get close but do not sustain
>an oscillation.
>
>Still poking around the breadboard, but any comments?

I could hardly get mine to _stop_ oscillating. I had to put extra 
caps into that banshee from hell to keep if from frying my tweeters. 
I doubt it's a "classic" design since it uses a CEM 3320, but it 
still uses the same format: two integrators and summing amp.