Transmit clock generation system and method

Details Transmit clock generation system and method Transmit clock generation system and method

1996-11-04

1999-07-13

Chin, Stephen

Pulse or digital communications

Transceivers

375222, 375371, 375373, H04B 138

Patent

active

059237040

ABSTRACT:
A method for generating transmit clock timing of a first communications unit of a communications system. The communications system includes the first communications unit and a second communications unit, each capable of communications with the other. The first communications unit has a first internal clock and the second communications unit has a second internal clock. According to one example embodiment, the method includes the steps of receiving a receive data signal by the first communications unit from the second communications unit, adjusting a receive reference clock to the receive data signal to generate an adjusted receive reference clock that tracks the receive data signal, accumulating the adjustments made in the adjusting step, applying the adjustments accumulated to vary the first internal clock in order to slave the first internal clock to the second internal clock of the second communications unit so as to generate an adjusted receive reference clock that is the adjusted and slaved first internal clock, and deriving a transmit clock from the adjusted receive reference clock.

REFERENCES:
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patent: 4451916 (1984-05-01), Casper et al.
patent: 4495617 (1985-01-01), Ampulski et al.
patent: 5111451 (1992-05-01), Piasecki et al.
patent: 5166629 (1992-11-01), Watkins et al.
patent: 5256994 (1993-10-01), Langendorf
patent: 5592128 (1997-01-01), Hwang
patent: 5635875 (1997-06-01), Kusakabe

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