Frequency shift keyed detector system

Details Frequency shift keyed detector system Frequency shift keyed detector system

1981-09-28

1983-10-25

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

329105, H03D 318

Patent

active

044123388

ABSTRACT:
A method of and apparatus for discriminator FSK signals using a tri-state phase detector is disclosed in which an input of known frequency is combined with the unknown FSK signal input and the output is fed to an integrator only after the minimum clearing time of the tri-state during each bit period. The integrator receives only the cleared signal for use in binary data signal determination thereby overcoming problems associated with lack of initial phase information at the tri-state phase detector.

REFERENCES:
patent: 3439283 (1969-04-01), Danielson
patent: 3555428 (1971-01-01), Perreault
patent: 3559083 (1971-01-01), Crouse
patent: 3660771 (1972-05-01), Balugani et al.
patent: 4021744 (1977-05-01), Montefusco
patent: 4079329 (1978-03-01), England et al.

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