Self-oscillating State Variable Filter

Discussion in 'The Projects Forum' started by osterchrisi, May 9, 2011.

  1. osterchrisi

    Thread Starter New Member

    May 9, 2011
    2
    0
    Hey!

    This is my first post here, so hello to everyone! :)

    I'm building a voltage controlled state variable filter with vactrols and so far everything works out perfect. Nevertheless there's one wish my circuit doesn't fulfill me yet: self-oscillation. It oscillates at high audio frequencies but the lower I take the cutoff frequency the more the oscillation vanishes until a certain point, where it stops completely.

    Is there any trick to get a SVF to self-oscillate 'better'?
    Thanks a lot for any suggestions!!
     
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