True_PMS_circuit_using_one_AD531_multiplier_divider_and_two_AD741_op_amps

Published:2009/7/21 2:49:00 Author:Jessie | From:SeekIC

True PMS circuit using one AD531 multiplier/divider and two AD741 op amps. The AD531 is combined with a simple filter to obtain the true PMS value of an AC input signal. By scaling VOUT=10 volts DC for a ±10-volt DC input this circuit can give direct RMS readings for 100 hertz to 100 kilohertz sine waves from 0.2 volt to 7.0 volts peak (courtesy Analog Devices, Inc.).



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