[sdiy] very simple VCA circuit

[Neil Johnson]

David,

> 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.

Sounds like a VCA for control voltages?

> 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.

What spec are you looking for?  Offset voltage, CV bleedthrough, etc.

Cheers,
Neil
-- 
http://www.njohnson.co.uk