Optical pulse receiving circuit

Published:2011/5/11 8:41:00 Author:Nicole | Keyword: optical pulse | From:SeekIC

IC1~IC3 are high input resistance operational amplifier, IC4 is common operational amplifier. Photodiode D1 works with current, it has higher reverse bias voltage. The light signal received by D1 is amplified by IC1, filtered by IC2, amplified by IC3 again, then rectifier filtered by D2, R8, C4, outputed by comparator composed of IC4, its output range is -15~+15V. In figure, P1 adjusts the middle frequency of bandpass filter, P2 adjusts the flipping point of IC4.



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