Clock recovery circuit

Details Clock recovery circuit Clock recovery circuit

2005-03-29

2005-03-29

Ghebretinsae, Temesghen (Department: 2631)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C375S376000, C327S147000

Reexamination Certificate

active

06873668

ABSTRACT:
A feed-forward controlled phase difference detector for detecting a phase difference using the output of a comparator included in an analog-to-digital converter, for example, is combined with a known digital feedback controlled phase difference detector for recovering a clock signal. The feed-forward controlled phase difference detector has its loop gain controlled adaptively. By utilizing these two types of phase difference detectors, a clock recovery circuit for recovering a clock signal synchronized to the data read out from a storage medium, for example, can operate faster and more stably.

REFERENCES:
patent: 5937020 (1999-08-01), Hase et al.
patent: 6141163 (2000-10-01), Nakamura et al.
patent: 6249557 (2001-06-01), Takatori et al.
patent: 6630868 (2003-10-01), Perrott et al.
patent: 09-063206 (1997-03-01), None
patent: 09-153262 (1997-06-01), None
patent: 10-256901 (1998-09-01), None
patent: 11-328874 (1999-11-01), None

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