SQUARE_WAVE_MODULATOR

Published:2009/7/6 23:38:00 Author:May | From:SeekIC

Analog modulation input goes through buffer Q1,-R1, to amplifier Q2-R2,-R3,. Outputs of Q2 are buffered by separate emitter-followers Q3, and Q4, and fed to clipping diodes D2, and D3 acting on top and bottom of amplified carrier wave, Following pulse amplifier converts TTL signal to square wave. Two opposed emitter-followers and D5, form buffer that can either source or sink current from load. Other three diodes are used to speed up circuit operation，Provides modulation range of 0-98％.-E .Burwen, Low-Power Square-Wave Modulator Is TTL Compatible. EDN Magazine．Nov,20.1973,p 91 and 93



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