Systems and methods for data recovery in an input circuit...

Details Systems and methods for data recovery in an input circuit... Systems and methods for data recovery in an input circuit...

2011-08-02

2011-08-02

Ha, Dac V (Department: 2611)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C375S354000

Reexamination Certificate

active

07991103

ABSTRACT:
Embodiments include systems and methods for recovery of data from an incoming digital data stream. Embodiments comprise a fine tracking loop to track the data when the phase between the incoming data and the receiver clock varies relatively slowly. Embodiments comprise a fast tracking loop performs to track the data when the phase between the incoming data and the receiver clock varies rapidly. The fine tracking loop adjusts the phase of a receiver clock to track the data eye of the data. The fast tracking loop over-samples the data and then chooses the sample that best represents the data. In some embodiments, the data recovery circuit can switch between receiving data from the fine tracking loop and receiving data from the fast tracking loop.

REFERENCES:
patent: 2003/0200490 (2003-10-01), Goudie
patent: 2006/0142061 (2006-06-01), Steffan
patent: 2007/0063741 (2007-03-01), Tarango et al.
patent: 2007/0147569 (2007-06-01), Chang et al.

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