Odp: [sdiy] high quality expo VCA

[Roman Sowa]

twenty seven pages manual for VCA module?

8-O

I wanted to use SSM2164 once as linear VCA, and additional
circuitry
I added was bigger than discrete VCA made of single
transistors.
This little trick described recently in EDN you mention, is
probably cleanest
solution. As a side effect you get temperature compensation
in linear mode.

Roman

----- Original Message -----
From: Fernando de Izuzquiza <fdi at ran.es>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Thursday, November 21, 2002 10:04 PM
Subject: [sdiy] high quality expo VCA


> Hola list.
> I've found a complete high quality expo VCA.
> Schematics:
http://www.radio-flier.com/PDF%20Files/RFE117Sch.pdf
> Manual:
http://www.radio-flier.com/PDF%20Files/RFE117Man.pdf
> It looks great. (BurrBrown for the control path, that's
luxe!) No PCB?
>
> But still looking for a good VCA with expo/lin switchable
response...
>
> Has anyone designed an expo circuit with the SSM2164? We
have Mike Irwin LIN design, and the chip is
> originally expo so... it would be nice to switch between
the two responses.
>
>
> Fernando
>
>
> f
> *
>
>