[sdiy] very simple VCA circuit

[Stewart Pye]

Do you need it to provide decent attenuation at minimum gain? (ie: have 
a wide dynamic range)
Will the CV have sudden changes like an envelop signal, or be more 
steady control voltages?


Cheers,
Stew.

David G. Dixon wrote:
> Hey Team,
>
> I'm looking for a very simple voltage-controlled gain circuit that I can
> build with, say, one BJT or JFET.  It only has to handle positive voltages,
> and the gain range will be confined to 0 to 2.
>
> I've tried simulating some JFET circuits from the web on Multisim, but have
> had no luck.  Any link to a schematic for a tried and tested circuit would
> be most appreciated, preferably one you've tried yourself.
>
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