also... Re: [sdiy] SSM2044 Filter schematic??

john mahoney jmahoney at gate.net
Thu May 20 21:10:19 CEST 2004


I had received the following from Steve Ridley back in October. He was
talking about a Maplin VCF kit that used the 2044:

> ... From what
> I remember, it was very close to the standard 2044
> data sheet circuit.
>
> A few thoughts - the data sheet suggests using a reverse log
> pot for the resonance control, which suggests the resonance
> VCA has an exponential/antilog response.  If you want CV
> control of resonance (and to avoid having to find a reverse
> log pot), you could try putting a few diodes and resistors
> around the resonance CV mixer opamp (similar to a soft
> distortion circuit) to make the response more even.  (Does
> that make sense?)

--
john



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