System and methods of recovering a clock from NRZ data

Details System and methods of recovering a clock from NRZ data System and methods of recovering a clock from NRZ data

2007-07-17

2007-07-17

Bayard, Emmanuel (Department: 2611)

Pulse or digital communications

Synchronizers

Self-synchronizing signal

Reexamination Certificate

active

10411996

ABSTRACT:
A substantially passive implementation of a clock recovery circuit may be employed to reduce or eliminate the amount of jitter added to the recovered clock by the recovery circuitry. NRZ data may be received in differential form (i.e., a separate NRZ signal and an inverted NRZ signal are received). The inverted NRZ data may be delayed by one-half of a unit interval with respect to the NRZ data by a delay element. The NRZ data and the delayed NRZ data may be combined by a broadband combiner (e.g., a resistive adder). The combined signal may be split into two signals. The two split signals may be rectified by suitable components. One of the limited split signals may be subtracted from the other limited split signal to generate an output signal. The generated output signal then possesses a spectral component at a clock frequency of the NRZ data.

REFERENCES:
patent: 4929849 (1990-05-01), Paul
patent: 5164966 (1992-11-01), Hershberger
patent: 5589683 (1996-12-01), Nakai
patent: 5671258 (1997-09-01), Burns et al.
patent: 6574022 (2003-06-01), Chow et al.
patent: 7072408 (2006-07-01), Gehlot et al.
patent: 2001/0027091 (2001-10-01), Kimishima
patent: 2003/0056157 (2003-03-01), Fala et al.
patent: 2003/0063698 (2003-04-01), Bonthron et al.
patent: 2004/0202481 (2004-10-01), Karlquist
Yoo et al. , A Novel Clock Extraction Circuit Using A New NRZ-to-PRZ Converter And A Dielectric Resonator Filter For 10 Gbits/s Optical Receiver, May 16-20, 1995, Microwave Symposium Digest, 1995, IEEE MTT-S International, vol. 3, pp. 1395-1398.□□.
U.S. Appl. No. 10/412,374, filed Apr. 11, 2003, Richard K. Karlquist.

Affiliated with

Also associated with

Rating

System and methods of recovering a clock from NRZ data does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and methods of recovering a clock from NRZ data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and methods of recovering a clock from NRZ data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3732230