Method and apparatus for frequency independent phase tracking of

Details Method and apparatus for frequency independent phase tracking of Method and apparatus for frequency independent phase tracking of

1990-05-29

1991-08-06

Grimm, Siegfried H.

Oscillators

Automatic frequency stabilization using a phase or frequency...

Plural oscillators controlled

331 25, 328165, 455260, H03L 707

Patent

active

050381156

ABSTRACT:
The output signal of a phase tracking system maintains phase coherence with the dominant input signal while tracking the frequency of that same dominant input signal without additional phase shifting circuitry. Circuitry having a second phase locked loop is added to a conventional phase locked loop to form a phase tracking system which provides a precisely constant phase shift over a full range of frequencies of the signal captured by the conventional phase locked loop.

REFERENCES:
patent: 4027264 (1977-05-01), Gutleber
patent: 4500851 (1985-02-01), Sawa et al.
patent: 4516084 (1985-05-01), Crowley
patent: 4567448 (1986-01-01), Ikeda
patent: 4859958 (1989-08-01), Myers

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