[sdiy] Expo in one chip?

[Neil Johnson]

Jacob Watterswrote:
> Thanks David. Like this example posted on muffwiggler?
>
> https://www.muffwiggler.com/forum/userpix/2077_dixie_cv_network_2.png
>
> That sovles the resistor contact issue, but it still has a high part count.
> Is there no such thing as a chip with linear in on one pin and expo out on
> another?

There are, but they tend to be rather expensive.  The term you're
looking for is "log amp" and they need some careful looking after to
behave properly in a circuit.  There was a thread on them about 3
years ago on muffwiggler IIRC....

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