Isolating AC "weng" sound electro-optical isolating circuit

Published:2011/5/2 7:55:00 Author:Nicole | Keyword: AC, electro-optical isolating | From:SeekIC

The TV audio feed-in circuit adopts photoelectric isolator to prevent grid frequency ground current from cycling, to protect low level singal from the interference of AC ong . This circuit is used in the modulator which can produce high quality sound and video output. The photoelectric isolator adopts photosensitive Darlington Transistor and infrared LED.It can use50kΩ variable resister to regulate diode current,then it will obtain best compromise between noise and distortion.



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