SCA_DEMODULATOR_

Published:2009/7/3 3:48:00 Author:May | From:SeekIC

VCO of NE565 PLL is set at 67 kHz and is locked in by incoming 67-kHz subsidiary-carrier component used for transmitting unintewupted commercial background music by FM broadcast stations. Circuit demodulates FM sidebands and applies them to audio input of commercial sound system through suitable filter. 5K pot is used to lock VC0 exactly on frequency. Frequency response extends up to 7000 Hz.-E. M. Noll, Linear IC Principles, experiments, and Proiects, Howard VV. Sams, Indianapolis, IN, 1974, p 212-213.



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