Bit synchronization circuit and central terminal for PON...

Optical communications – Transmitter and receiver system – Including synchronization

Reexamination Certificate

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C398S100000, C398S058000, C398S066000, C398S070000, C398S071000, C370S362000, C370S373000, C370S240000, C370S520000, C370S514000, C370S516000, C370S528000, C375S354000, C375S355000, C375S357000, C375S359000, C375S360000, C375S362000, C375S363000, C375S368000, C375S367000, C375S375000, C375S371000, C375S287000, C375S293000

Reexamination Certificate

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10654613

ABSTRACT:
A bit synchronization circuit composed of a multiphase data sampling unit for converting each received burst data sets to multiphase data trains, a phase determination unit for generating a control signal indicating an optimum phase data train, an output data selector for selectively passing optimum phase data train indicated by the control signal, and a data synchronization unit for converting the optimum phase data train to a data train in synchronization with a reference clock. The phase determination unit repeatedly detecting the optimum phase data train during the same burst data set is received. When optimum phase varies, the output data selector dynamically switches the optimum phase data train to be supplied to the data synchronization unit.

REFERENCES:
patent: 5657318 (1997-08-01), Ohmori et al.
patent: 6278755 (2001-08-01), Baba et al.
patent: 05-211498 (1993-08-01), None
patent: 07-193562 (1995-07-01), None
patent: 09-36849 (1997-02-01), None
patent: 09-162853 (1997-06-01), None
patent: 09-181713 (1997-07-01), None
patent: 10-247903 (1998-09-01), None
patent: 10-327159 (1998-12-01), None
patent: 11-308204 (1999-11-01), None
patent: P2002-51035 (2002-02-01), None
ITU-T Recommendation G.983.1, “Broadband Otpical Access System Based on Passive Optical Networks (PON)” COM Oct. 15, 1998 Original: English, pp. 1-426.

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