[sdiy] Moog VCF idea

houshu at muj.biglobe.ne.jp houshu at muj.biglobe.ne.jp
Wed Dec 12 03:31:19 CET 2001


Hi Paul,

Anode of D7 (right side) should be connected to pin 2 of U7, not pin 6.
In your circuit, no current flows from pin 5 of 3080 (Iabc) to pin4 (-Vcc).
These pins (5 and 4) should be in the feedback loop of U7.

Osamu Hoshuyama,  Kawasaki JAPAN.

> Dear all,
> 
>   Can anyone see any reason why this shouldn't work?
> 
> http://www.modulus.wavesynth.com/projects/CV_MOOG_VCF.pdf
> 
> (15k PDF)
> 
> I'm hopeing to add CV control of resonance to the Moog ladder, without
> useing special VCA chips..
> 
> Paul
> _______________________________________
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