HIGH_IMPEDANCE_DIFFERENTIAL_INPUTS

Published:2009/7/15 3:00:00 Author:Jessie | From:SeekIC

High impedance for both inputs of differential precision rectifier is provided by two opamps that produce current output for conversion to voltage by instrumentation amplifier A2. Diode bridge in feedback path of opamp A2 provides rectification with precise control for determining voltage drop across R. Design permits accurate measurement of differential AC inputs from millivolts to volts with AC voltmeter.-J. Graeme, Measure Differential AC Signals Easily with Precision Rectifiers, EDN Magazine, Jan. 20, t975, p 45-48.



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