6-pole switched capacitor filter "Q's" (literally)

[Duane R Balvage]

Hello all -

I have ordered some switched cap 6-pole butterworth filter chips from
National Semi... I originally got them to replace the anti-aliasing
filter and reconstruction filter in my Prophet-2000 sampler, but I got a
(strange) idea...

Can you loop the output through a VCA or variable attenuator back to the
input for a resonance control? Or will the switched-cap filter freeak
out if you do that? Anyone tried this? I don't have the chips yet, but I
was thinking of trying this.

				- Duane
-- 
   "That boy's got a mouth like a cannon ... Always shootin' it off..."
                                
                             - Foghorn Leghorn
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