Electro-optical amplifier circuit of computer photoelectric input machine

Published:2011/4/7 0:33:00 Author:Nicole | Keyword: electro-optical amplifier, computer, photoelectric input machine | From:SeekIC

When there is no illumination, germanium photosensitive diode is high resistance, saturate BG1, cut BG2 off, and the output is -6V. When there is illumination, germanium photosensitive diode is low resistance, then cut BG1 off, turns BG2 on, cut BG5 off, the output is almost 0V. In figure, BG3, B4 play a role in reverse voltage protection. Potentiometer W is to adjust the width of output waveform, it can normal work between 600~700μs generally.



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