Optical isolation circuit for isolating AC hum sound

Published:2011/9/15 21:25:00 Author:Rebekka | Keyword: Optical isolation , AC hum sound | From:SeekIC

In the TV's audio feed-in line, it uses optical isolators to prevent ground current power frequency cycle. It protects the low-level signals from the exchange om sound interference. This circuit should be used for generating high-quality sound and video output of the modulator.The optical isolator uses the photosensitiveLinton tube and infrared light emitting diode. It uses 50KΩ variable resistor regulatorto adjustdiode current and get the best compromise between the noise and distortion.



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