Serial clock synchronization circuit

Details Serial clock synchronization circuit Serial clock synchronization circuit

1996-03-21

1997-12-09

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

327 48, 377 39, 377 50, 375355, H03K 526, H03L 700

Patent

active

056964625

ABSTRACT:
A low cost and easily implemented apparatus and method for synchronizing serially connected clock circuits is ideally suited to audio applications. The circuit takes data from a bitstream clock source and from the local source and counts the number of pulses received from each. A desired clock count is calculated based as a multiple of the ratio of the bitstream clock source frequency to the local clock signal frequency. Based on the samples received from the bitstream clock relative to the local clock at a later point in time, samples are either repeated or dropped to correct any error in the bitstream signal.

REFERENCES:
patent: 3723889 (1973-03-01), Oberst
patent: 4345211 (1982-08-01), Longworth
patent: 4686483 (1987-08-01), Isshiki et al.
patent: 4780895 (1988-10-01), Paul
patent: 5170417 (1992-12-01), Winter
patent: 5519500 (1996-05-01), Kumamoto

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