[sdiy] Seeking examples for Wed lecture

[Aaron Lanterman]

I'm going to show Rene's "late" MS-20 style LPF - but I'm also looking for 
the original LM13700 based one (along with the HPF) somewhere... all I can 
find is schematics of the "old" MS-20 style filter, with the weird Korg-35 
chip...

...also I swore I had downloaded a Korg Delta schematic from somewhere, 
but I can't find it now - it was interesting since it was like two LPF 
Sallen-Keys in series, forming a 4-pole... can anyone point me to it?

...any other good Sallen-Key OTA-based examples out there? Maybe a 
Sallen-Key OTA actual bandpass filter?

(there's pleanty of state variable examples, no problem there)

For Sallen-Key vactrols, you of course can already guess what I'm going to 
use. ;)

- Aaron

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Dr. Aaron Lanterman, Asst. Prof.       Voice:  404-385-2548
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