WEAK_SIGNAL_DECODER

Published:2009/7/11 4:35:00 Author:May | From:SeekIC

Combination of narrow-bandpass 800-Hz active filter and phase-locked loop of tone decoder permits copying very weak signals in Morse code. LED provides visual indication supplementing conventional output for headphones or loudspeaker.-Circuits, 73 Magazine, July 1977, p 35.



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