Modulus VCA

jorgen.bergfors at jorgen.bergfors at
Wed May 13 13:44:27 CEST 1998

Has anybody built the VCA in Modulus issue 5 (
I have built it and it seems to work OK. I haven't had time to test the 
performance (noise etc) though.
The only problem I seem to have with it is that there is a DC offset at the 
output if the control voltage goes negative. Is this normal and in that case, 
any ideas how it can be avoided?


P.S. I made a Veroboard layout for the VCA. If any of you want to try it (and 
haven't already recieved it), send me a note and I will e-mail it.

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