The photoelectric coupler separation amplifier circuit of PWM modulation

Published:2011/7/4 20:22:00 Author:Borg | Keyword: photoelectric coupler, PWM modulation | From:SeekIC

After the impedance conversion by A1, the input signal of the circuit is past the integrator, time lag comparator A2 and PWM modulation circuit, then it is converted into a pulse signal which has some time width, its signal LEV is processed as the digit signals of 1 and 0. The pulse signal drive photoelectric coupler TLP512, which has some certain time width, can get the pulse signal of certain time width at the second stage, but the primary signal is separated. The phase reverser 4069 of the second stage receives this time width pulse signal.



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