AW: [sdiy] Dual Frequency Shifter using a log amp

[Tim Daugard]

> I just say sometimes I'm blind, and as I understood Tim has a solution
> that has worked in practice.

Only the log function. I haven't put a log signal through a phaser yet. My solution was to
address the compander requirement.

> Anyway. Compander will work. I have a compander in my old FS-1.
> A very simple one, too, with long release time constant.

My log amp has no time component involved, the funtion is approximately:

sign(input) X post gain X log(abs(input))

This eliminates the time dependencies of the compander functions.

Tim Daugard
AG4GZ 30.4078N 86.6227W Alt: 12 feet above MSL
http://home.sprintmail.com/~daugard/synth.htm