FAIL_SAFE_COMMUNICATIONS_SQUELCH_CIRCUIT

Published:2009/7/17 4:47:00 Author:Jessie | From:SeekIC

Circuit adjusts automatically to changing noise levels in point-to-point vhf and uhf receivers while suppressing noise when no carrier is present, but stays open when receiver gain is below threshold level of 0.7 microvolt over range of 108.95 to 135.95 Mc. Schmitt trigger gives fast turn-on and turn-off of receiver audio output at predetermined carrier-to-noise ratios.-H. G Michael, Fail-Safe Squelch Circuit Adapts to Changing Noise levels, Electronics, 36:1, p 88-91.



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