2_10V_P_P_TRUE_RMS_T0_600_kHz

Published:2009/7/15 2:38:00 Author:Jessie | From:SeekIC

Input waveform is squared by first Motorola MC1594 multiplier, and current output is converted to voltage by opamp for driving second multiplier which has capacitor in feedback path to perform averaging function. Second opamp is used with second multiplier as feedback element to produce square-root configuration required for giving true RMS value. Accuracy is within 1% over input voltage range.-K. Huehne and D. Aldridge, Multiplier/Op Amp Circuit Detects True RMS, Motorola, Phoenix, AZ, 1974, EB-20.



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