Frame synchronizing circuit

Details Frame synchronizing circuit Frame synchronizing circuit

2005-03-08

2005-03-08

Corrielus, Jean B. (Department: 2637)

Pulse or digital communications

Synchronizers

Frequency or phase control using synchronizing signal

C375S134000, C375S365000, C714S707000, C714S789000, C714S798000, C370S511000, C370S513000

Reexamination Certificate

active

06865240

ABSTRACT:
The frame synchronizing circuit establishes frame synchronization by detecting a sync pattern laid in an incoming frame. The frame synchronization circuit comprises a first frame synchronizing unit and a second frame synchronizing unit. The first and second synchronizing units synchronize with a first pattern, a second pattern at a first position and a second position, respectively. Thereafter, when the first position used for the synchronization by the first frame synchronizing unit is found to be in error, the first frame synchronizing unit synchronizes with the second pattern at the second position used by the second frame synchronization unit.

REFERENCES:
patent: 4574377 (1986-03-01), Miyazaki et al.
patent: 5592518 (1997-01-01), Davis et al.
patent: 6535566 (2003-03-01), Tamamura et al.
patent: 20030161349 (2003-08-01), Marutani
patent: 63-236434 (1988-10-01), None
patent: 5-37515 (1993-02-01), None
patent: 6-164572 (1994-06-01), None
patent: 7-235920 (1995-09-01), None

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