Detector for detecting timing in a data flow

Details Detector for detecting timing in a data flow Detector for detecting timing in a data flow

2006-04-04

2006-04-04

Tse, Young T. (Department: 2637)

Pulse or digital communications

Synchronizers

Self-synchronizing signal

C375S371000, C370S518000, C327S153000

Reexamination Certificate

active

07023943

ABSTRACT:
A detector detects timing in a digital data flow with a bit-time equal to T. A first circuit generates four local timing signals each having periods substantially equal to the bit-time. Each of the four local timing signals are out of phase with one another by ¼ period. A second circuit samples the four local timing signals upon each transition of a first type for determining, based upon the sampling, whether two of the four local timing signals forming a pair of reference signals that are out of phase by ½ period are advanced or delayed relative to the timing of the data flow. The second circuit controls the first circuit for delaying or advancing the four local timing signals based upon the pair of reference signals.

REFERENCES:
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patent: 6064707 (2000-05-01), Woodman, Jr.
patent: 6118313 (2000-09-01), Yakabe et al.
patent: 153107 (1985-08-01), None
patent: 0499479 (1992-02-01), None
patent: 714190 (1996-05-01), None
patent: 822683 (1998-02-01), None

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