[sdiy] Log -> process -> AntiLog

Scott Gravenhorst music.maker at gte.net
Thu Apr 17 19:18:24 CEST 2003


I want to process the logarithm of a linear CV and then
convert the result back to a linear CV (voltage, not current).

I know that a log amp can be made with an opamp, input
resistor and within the negative feedback loop, a diode.  Is
there some simple way to get the anti-log voltage output
function ?  Can I simply swap the diode and resistor so that
the signal passes through the diode and the resistor is in
the neg. feedback loop?  If not, then how?

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