DIFFERENTIAL_VOLTMETER

Published:2009/7/24 1:34:00 Author:Jessie | From:SeekIC

High-impedance differential-input transistorized panel voltmeter has stable zero point, eliminating need for undesirable zero control. Meter com pares voltage under test with known zener regulated reference voltage. Circuit is differential Darlington connected emitter-follower using pair of 2N2060's. Bias point is stabilized by constant-current sync connected to 2N1613 transistor. Accuracy is 1% if unmatched source impedance is less then 10K.-A High-Stability Differential Voltmeter, Electronic Circuit Design Handbook, Mactier Pub, Corp., N.Y., 1965, p 152.



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