[sdiy] Expo in one chip?

Neil Johnson neil.johnson71 at gmail.com
Tue Dec 26 23:14:49 CET 2017

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....


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