Frequency detector for use with phase locked loop

Details Frequency detector for use with phase locked loop Frequency detector for use with phase locked loop

1984-06-11

1986-06-10

LaRoche, Eugene R.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Afc with logic elements

307525, 307526, 328133, 328134, 331 25, H03L 700

Patent

active

045945640

ABSTRACT:
A frequency detector receiving two input frequencies and generating a pump-up/pump-down signal for control of a phase locked loop by matching the frequency of a voltage controlled oscillator to the frequency. The lock is independent of the phase relationship of the signals.

REFERENCES:
patent: 3458823 (1969-07-01), Nordahl
patent: 3714463 (1973-01-01), Laune
patent: 3835413 (1974-09-01), Epstein
patent: 3908174 (1975-09-01), Hamada
patent: 4277754 (1981-07-01), Minakuchi
patent: 4308505 (1981-12-01), Messerschmitt
patent: 4363004 (1982-12-01), Englund
patent: 4378509 (1983-03-01), Hatchett et al.

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