Published:2011/6/10 21:02:00 Author:qqtang | Keyword: switch circuit, self-lock | From:SeekIC
In the figure is the application in modulation (or wave chopper)of photoelectric couplers. Impose two square wave voltages, between which the difference is 180o, on GY1 and GY2 of the photoelectric coupler, so that they glow in turn, the light dependent triodes of GG1 and GG2 are conducting and blocked in turn, the output terminal gets periodical signals, which fulfills functions of modulation on the input signal Ui.
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