[sdiy] ARP Quadra - Gilbert Cells VCAs?!?

rsdio at audiobanshee.com rsdio at audiobanshee.com
Mon May 7 00:14:33 CEST 2018


What are you saying?

A) Standard VCA chips have level-dependent distortion

B) Gilbert Cell Multipliers have less distortion

C) Gilbert Cell Multiplier distortion is not level-dependent

D) All of the above

E) Some of the above


On May 6, 2018, at 11:58 AM, Michael E Caloroso <mec.forumreader at gmail.com> wrote:
> Last night I was browsing the service manual and was amused to find
> that ARP implemented discrete Gilbert Cell Multipliers for the VCAs in
> the Quadra.  Usually they're found in bench measurement tools, this is
> the first time I have seen them used in a synth.
> 
> I can certainly appreciate the decision: with a machine comprising a
> string machine, lead synth, bass synth, and poly synth there is a LOT
> of potential hot signal passing through those VCAs.




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