ELECTROMETER_PREAMP

Published:2009/7/21 6:13:00 Author:Jessie | From:SeekIC

Transformer T1 feeds drive coil of vibrating capacitor C1 used in place of conventional chopper for measuring picoampere currents. Output of electrometer, taken from Q2 of preamp, goes to amplifier that is source of feedback signal. -V. J. Caldecourt, Using a Vibrating Capacitor as an Electrometer Input, Electronics, 35:14, p 48-50.



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