Simplified Infrared Remote Control Receiving Circuit by Using Monolithic IC

Published:2011/6/14 13:13:00 Author:Michel | Keyword: Monolithic IC, Infrared Remote Control, Receiving Circuit | From:SeekIC

Circuit's Functions Infrared remote control is widely used in audio and video equipments.This circuit adopts LA7224 and it intergrates the preamplifier,peak keeping circuit, integral circuit etc. in a chip and these devices are used receive signal,which simplfies the circuit. Circuit's Work Principle It removes silicon light diode to receive infrared radiation via current.Because the signal is very weak,60DB need be amplified.To improve S/N,the carrier wave is taken out by usingresonant tank composed of L1 and C2 and it keeps the peak via limiting circuit. C4 is integral capacitance, according to manufacturer requirements, capacity chooses 0.0047 UF.



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