Analog isolation circuit

Published:2011/5/29 22:07:00 Author:chopper | Keyword: Analog, isolation | From:SeekIC

This circuit is a FM transmission system which uses light as media.The transmitter uses 565 phase-locked loop as voltage controlled oscillator,making the LED of optoelectronic isolator flash at a rate that is proportional to input voltage.The driving amplifier of photoduodiode is of enough gain to add 200mV(peak-peak) signal to the input end of recipient 565.Recipient 565 is acted as a frequency modulation detector and reproduces the signal which is imported to the transmitter.The power source is between ±6 and ±12V.



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