AW: [sdiy] DBX VCA

[Ken Stone]

>Now I'm curious about the Serge VCF and DSG circuits. I would not expect
>the _need_ for such a circuit in the DSG (it has linear ramps, hasn't it?).
>I would expect exponential current steering with two complementary pairs
>without the opamp / feedback loop would do for this function. But I really
>don't know; I've never seen this Serge circuit.

The later Serge VCAs as used in the VCFQ and assorted VCAs are very similar
to the VCA presented in the LM394 app note. These are the little modules you
see hanging off the back of various printed circuit boards.

I think you are on the right track for the DSG.

Ken
_______________________________________________________________________
Ken Stone   sasami at hotkey.net.au  
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>