Nonlinear Feedback Filter

[Scott Gravenhorst]

So far I have prototyped the basic LM13600 voltage controlled state
variable filter and it works.  Now I need to add the custom stuff to
allow for switchable nonlinear feedback.  I'm tired and it's hot, so
I'm calling it a good day and putting it down for now.  Hopefully,
next weekend will be cooler so that I can use the Oscope.  I hope to
have good things to post next week.

Worst case is that I just built another VCF.


-- Scott Gravenhorst
-- FatMan Site: www.teklab.com/~chordman