Device for the synchronization of digital data bursts and read a

Pulse or digital communications – Synchronizers – Phase displacement – slip or jitter correction

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375375, H03D 324

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054652774

ABSTRACT:
The invention relates to the synchronization of a local clock (VCO) with a first clock frequency (Fo) equal to that of time-spaced digital data bursts read from a record carrier which also carries a continuous digital signal (H) of a second clock frequency (F). In accordance with the invention, locking to the desired frequency is assured by a frequency comparator (FD) which detects the frequency shift between the signal (S) of the local clock (VCO) and the signal of the second clock frequency (F). The device also comprises a phase-locked loop (PD) which provides phase locking once the synchronization has locked to the correct frequency.

REFERENCES:
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patent: 4594516 (1986-12-01), Tokumitsu
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patent: 4814719 (1989-03-01), Guyer
Schepers et al "An Integrated Multinorm Receiver" Symposium Record Joint Session CBroadcast & TV Symposium, Montreax pp. 181-204 11-17 Jun. 1987.
Hirashima et al "A Circuit Design of Sampling Clock Regeneratation" IEEE Transactions on Consumer Electronics vol. CE-26 No. 3 1980 pp. 657-663.

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