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Looking for a "simple" transistor VCF

Started by StephenGiles, October 01, 2010, 09:21:06 AM

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StephenGiles

October 01, 2010, 09:21:06 AM
Unusual for me to look for something simple, but I can't find my bag of optos at the moment and I don't want to go the OTA route. I have seen such a VCF circuit but where???
"I want my meat burned, like St Joan. Bring me pickles and vicious mustards to pierce the tongue like Cardigan's Lancers.".

daverdave

#1
October 01, 2010, 09:38:28 AM
This was on Jürgen Haible's site, the description says 'How to build a fully polyphonic instrument in 1975: thyristor VCO, one-transitor VCF and one-transistor VCA. And don't forget the single opamp that works as saw wave buffer and PWM comparator !'

http://www.jhaible.de/pe1000_1.gif

the filter looks pretty simple to me, but I'm a bit of a novice with filters.

StephenGiles

#3
October 01, 2010, 11:16:29 AM
Wonderful, thanks very much.
"I want my meat burned, like St Joan. Bring me pickles and vicious mustards to pierce the tongue like Cardigan's Lancers.".

slacker

#4
October 01, 2010, 12:07:56 PM

StephenGiles

#5
October 01, 2010, 01:08:05 PM
"I want my meat burned, like St Joan. Bring me pickles and vicious mustards to pierce the tongue like Cardigan's Lancers.".

StephenGiles

#7
October 02, 2010, 06:41:39 AM
"I want my meat burned, like St Joan. Bring me pickles and vicious mustards to pierce the tongue like Cardigan's Lancers.".
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