H - Electricity – 03 – D
Patent
H - Electricity
03
D
329/16, 325/80
H03D 3/04 (2006.01) H04L 1/20 (2006.01)
Patent
CA 1072640
Abstract of the Disclosure Readily available digital logical circuit components are arranged in circuitry for enhancing demodulation of binary frequency shifted or phase shifted modulation signals in the presence of a received carrier wave and inhibiting demodulation in the absence of any recognized carrier wave. The circuitry is arranged for counting impulses as received including noise impulses which penetrate an input band-pass filter. The preponderance of signal impulses lie within predeterminable limits, however, and the circuitry is arranged for opening electronic gating circuits within such predetermined limits and holding them open despite some noise impulses passing the filter. The circuitry is further arranged for integrating the signal impulse train and triggering the subsequent stages of the receiving system accordingly. The electronic circuit components are conventional and also are readily laid down in semi-conductor structure of the popular types. -1-
272856
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