[sdiy] Design for a very strong filter?

[John Mahoney]

At 04:09 PM 6/6/2008, Tom Wiltshire wrote:

>Robert,
>
>People are going to scream at me, but...your requirements sound like
>a switched capacitor filter! [snip]

Blacet's discontinued Final Filtre VCF was an example of this:
         "The Final Filtre is a high quality five pole low pass 
filter designed around a high accuracy, low noise, low distortion
switched capacitor filter IC. The Final Filtre includes 1V/oct 
voltage control of the frequency and voltage controlled
Q. A notch filter output is also provided." -- The FF Manual

John





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