Device for the synchronization of a timing signal

Details Device for the synchronization of a timing signal Device for the synchronization of a timing signal

1980-05-30

1982-09-28

Heyman, John S.

Pulse or digital communications

Spread spectrum

Direct sequence

331 25, 328 72, 328155, H03L 718

Patent

active

043521959

ABSTRACT:
A device for the synchronization of a local timing signal which restores the baud rhythm at which the binary data of a message are received comprises a device for making the frequency and phase of the local timing signal dependent on the transitions of the data signal received and a rapid synchronization circuit for accelerating the synchronization process. This circuit counts the number of coincidences of n successive transitions detected (n equals a positive integer) with each of k separate time intervals (k equals positive integer) of the same duration. It divides up the integrality of each cycle of the local timing signal and supplies a pulse as from the time at which p coincidences with one of the k intervals of time have been counted. This pulse makes it possible to initiate the dependent local timing signal within a very short time.

REFERENCES:
patent: 3440547 (1969-04-01), Houcke
patent: 3562661 (1971-02-01), Crumb et al.
patent: 3755748 (1973-08-01), Larlow et al.
patent: 4080576 (1978-03-01), Huber et al.
patent: 4229822 (1980-10-01), Bench

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