[sdiy] Change response from Lin to Log to Lin to Exp?

[Neil Johnson]

> http://www.sdiy.org/juz/vca_comparison_01.jpg
...
> Is there a circuit that will convert the Linear CV to a curve that would flip either of the  the single transistor VCA curves so it was closer to the Exponential response of the 2164? A Lin to ...something converter?

A diff-amp across the VCA?  That would make the blue curve look like
the green curve.

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