Digital phase-locked loop

Details Digital phase-locked loop Digital phase-locked loop

2005-11-15

2005-11-15

Chin, Stephen (Department: 2634)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C375S240280, C375S376000, C375S374000

Reexamination Certificate

active

06965660

ABSTRACT:
A digital phase-locked loop is provided having a minimal transient recovery time for emitting an output clock signal which is synchronous with a reference clock signal in a normal operating state of the digital phase-locked loop. The phase-locked loop can include a phase detector for identifying a phase deviation between the reference clock signal and a feedback clock signal. Further, the phase-locked loop can include a resettable counter, which generates a digital phase deviation signal corresponding to the identified phase deviation. The phase-locked loop can also include a resettable digital filter for filtering the digital phase deviation signal. Further, the phase-locked loop can include an oscillator circuit for generating the output clock signal as a function of a filtered digital phase deviation signal. The phase-locked loop can also include a resettable feedback frequency divider which divides the output clock signal for generating the feedback clock signal.

REFERENCES:
patent: 4057768 (1977-11-01), Juliusburger et al.
patent: 4290029 (1981-09-01), Streckenbach
patent: 4351002 (1982-09-01), Decraemer et al.
patent: 4914404 (1990-04-01), Ernst
patent: 5142420 (1992-08-01), Tanaka et al.
patent: 5334952 (1994-08-01), Maddy et al.
patent: 6052034 (2000-04-01), Wang et al.
patent: 6078633 (2000-06-01), Shiotsu et al.
patent: 6259328 (2001-07-01), Wesolowski
patent: 6404247 (2002-06-01), Wang
patent: 6754280 (2004-06-01), Nguyen
patent: 2002/0008589 (2002-01-01), Lanoman et al.
patent: 2856211 (1980-03-01), None
Walters et al., “ Digital Phase-Locked Loop with Jitter Bounded,”IEEE Transactions on Circuits and Systems, vol. 36, No. 7, Jul. 1989, pp. 980-986.

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