High speed frequency-shift keying decoder

Details High speed frequency-shift keying decoder High speed frequency-shift keying decoder

1992-11-23

1994-07-26

Chin, Stephen

Pulse or digital communications

Repeaters

Testing

329303, 329337, 455337, H04L 2714

Patent

active

053331516

ABSTRACT:
A frequency-shift keying (FSK) signal detector splits an FSK signal into two paths. In one path, a phase-altering circuit having a variable frequency characteristic between the two encoding frequencies of the FSK signal provides either a phase lead or a phase lag depending upon the instantaneous frequency of the FSK signal. The phase-altered signal is sampled in response to the signal in the second path to decode a digital signal.

REFERENCES:
patent: 3017464 (1962-01-01), Broughtwood et al.
patent: 3470478 (1969-09-01), Crafts
patent: 3569845 (1971-03-01), Steinberg
patent: 3601710 (1971-08-01), Morra
patent: 3739288 (1973-06-01), Coccagna
patent: 4193034 (1980-03-01), Vance
patent: 4335354 (1982-06-01), Crandall et al.
patent: 4472816 (1984-09-01), Thompson
patent: 4571738 (1986-02-01), Vance
patent: 5155446 (1992-10-01), Eberle

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