FSK data receiver

Details FSK data receiver FSK data receiver

1985-04-29

1987-05-26

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375 97, 329112, 329122, H03D 300

Patent

active

046690948

ABSTRACT:
For receiving frequency shift keyed data, a local oscillator generates a signal which is frequency shifted through a fixed frequency relative to the carrier signal, and is mixed with the received FSK signal. A circuit processes the mixer output to emphasize the energy content of signals located at the ends of the receiver passband, over signals located toward the center of the pass band. The output of that circuit is integrated to provide the AFC signal to the voltage-controlled local oscillator.

REFERENCES:
patent: 2715677 (1955-08-01), Turner
patent: 4254503 (1981-03-01), Vance
patent: 4291275 (1981-09-01), Nossen
patent: 4462107 (1984-07-01), Vance
patent: 4523324 (1985-06-01), Marshall

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