ANALOG_ISOLATOR

Published:2009/7/6 7:30:00 Author:May | From:SeekIC

Circuit is basically FM transmission system in which light is used as transmission medium. Transmitter uses 565 PLL as VCO for flashing LED of optoisolator at rate proportional to input voltage. Phototransistor drives amplifier having sufficient gain to apply 200 mV p-p singnal to input of receiving 565 acting as FM detector for re-creating input to transmitter. Supply can be ±6 V to ±12 V.- Signetics Analog Data Manul, Signetics, Sunnyvale, CA, 1977, p 846-847.



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