Apparatus for synchronizing clock using source synchronous...

Details Apparatus for synchronizing clock using source synchronous... Apparatus for synchronizing clock using source synchronous...

2007-02-20

2007-02-20

Nguyen, Linh My (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S147000

Reexamination Certificate

active

11223277

ABSTRACT:
An apparatus for synchronizing a clock using a source synchronous clock is disclosed. The apparatus includes: channel receivers for receiving a source synchronous channel; divider for dividing the source synchronous clock to a low frequency clock; selectors for selecting one of the divided source synchronous clock and a system clock as a reference clock; detectors for generating a phase difference signal; phase difference signal selectors for selecting a phase difference signal from the detectors and a phase difference signal from an internal logic; and voltage oscillators for transmitting a clock synchronized to a source synchronous channel to the external optical transmission system by generating a predetermined synchronous frequency according to the selected phase difference signal.

REFERENCES:
patent: 6452421 (2002-09-01), Saito
patent: 6631144 (2003-10-01), Johansen
patent: 1998-033965 (1998-08-01), None

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