Created by
Created March 27, 2012
Last modified May 20, 2012
Tags amplifier   audio   bjt   differential   jfet  


Differential FET input, single supply, referenced to ground.

V6 or R13 sets bias point. Differential in. Differential out.

Note Q1, Q2 feed back through Q5E to improve CMRR and stabilize bias over temperature.

Useful for mikes/geophones at the end of 500' twisted-pair telephone cable.


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