Adaptive lock position circuit

Details Adaptive lock position circuit Adaptive lock position circuit

2006-05-23

2006-05-23

Le, Dinh T. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Regenerating or restoring rectangular or pulse waveform

C327S156000

Reexamination Certificate

active

07049869

ABSTRACT:
An adaptive lock position circuit includes a jitter distribution extremity detector and a phase shifting circuit. The jitter distribution extremity detector receives an input data signal and is operable to compare the input data signal with one or more clock signals derived from a recovered clock signal from a clock and data recovery (CDR) circuit to generate one or more control signals that define the boundaries of a jitter extremity detection window. The phase shifting circuit is coupled in a feedback loop with the jitter distribution extremity detector and receives the one or more control signals from the jitter distribution extremity detector and also receives the recovered clock signal. The phase shifting circuit is operable to shift the phase of the recovered clock signal as a function of the one or more control signals to generate a retiming clock signal such that an edge of the retiming clock signal is interpolated within the jitter extremity detection window.

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McCormack, Gary, “Intelligent Data Recovery”, CSD Dec. 1999 Feature: Intelligent Data Recovery, pp. 1-19.

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