Half-rate clock and data recovery circuit

Details Half-rate clock and data recovery circuit Half-rate clock and data recovery circuit

2007-10-16

2007-10-16

Payne, David C. (Department: 2611)

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

C375S354000, C375S371000, C375S373000

Reexamination Certificate

active

10801673

ABSTRACT:
A half-rate clock and data recovery (CDR) circuit includes a half-rate phase detector for detecting phases of an input signal and a half-rate clock, a charge pump circuit, a low-pass filter and a voltage controlled oscillator for feeding the half-rate clock back to the half-rate phase detector. The half-rate phase detector includes a one-pulse delay circuit for generating a delay of one pulse . The phase comparison polarity of the half-rate phase detector including the one-pulse delay circuit enables use of an N type LC voltage controlled oscillator as the voltage controlled oscillator.

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patent: 2002-359555 (2002-12-01), None
J. Savoj et al., “A 10Gb/s CMOS Clock and Data Recovery Circuit with Frequency Detection”,ISSC Digest of Technical Papers, Feb. 2001. pp. 78-79, 5(3), Los Angeles, CA.

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