Pulse or digital communications – Synchronizers – Phase displacement – slip or jitter correction
Patent
1994-07-27
1996-07-23
Chin, Stephen
Pulse or digital communications
Synchronizers
Phase displacement, slip or jitter correction
375363, 370102, H04L 700
Patent
active
055397859
ABSTRACT:
A jitter/wander reduction circuit is provided for a desynchronizer deriving an output clock signal from an independent clock signal and phase adjustment signals. Phase adjustment signals relate to a deviation of the independent clock signal from an input clock signal. The circuit includes a frequency offset estimation circuit receiving phase adjustment signals and providing a frequency offset estimation signal. A phase controller receives the frequency offset estimation signal, provides a feedback signal to the frequency offset estimation circuit, and provides a phase difference signal. A clock generator circuit receives the independent clock signal and the phase difference signal. The independent clock signal is adjusted based on the phase difference signal to provide an output clock signal.
REFERENCES:
patent: 3812430 (1974-05-01), Schmidt et al.
patent: 4731646 (1988-03-01), Kliem
patent: 4792966 (1988-12-01), Ballweg
patent: 4847875 (1989-07-01), Choi
patent: 5235531 (1993-08-01), Foerg
patent: 5313502 (1994-05-01), Nawrocki et al.
Burch Richard A.
Schneider Kevin W.
Turner Michael D.
Adtran
Bocure Tesfaldet
Chin Stephen
Wands Charles E.
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