Circuit providing improved lock-in for a phase-locked loop

Details Circuit providing improved lock-in for a phase-locked loop Circuit providing improved lock-in for a phase-locked loop

1987-07-01

1989-01-31

Wan, Gene

Oscillators

Automatic frequency stabilization using a phase or frequency...

With reference oscillator or source

331 1R, H03L 708

Patent

active

048018961

ABSTRACT:
Disclosed is a latching differential phase detector for improving a slew rate and preventing false phase lock due to cycling. The system combines 2.pi. proportional phase detectors to cover a 4.pi. range. The lock monitors of the phase frequency detectors control a differential phase detector to provide positive latching.

REFERENCES:
patent: 3431509 (1969-03-01), Andrea
patent: 3953794 (1976-04-01), Moore
patent: 4277754 (1981-07-01), Minakuchi
patent: 4291274 (1981-09-01), Suzuki et al.
patent: 4322643 (1982-03-01), Preslar
patent: 4339731 (1982-07-01), Adams
patent: 4500852 (1985-02-01), Phillips
patent: 4502014 (1985-02-01), Bismarck
patent: 4635000 (1987-01-01), Swanberg
Motorola MC 4344/ML4044 Data Sheet A11.

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