Digital data detecting and synchronizing circuit

Details Digital data detecting and synchronizing circuit Digital data detecting and synchronizing circuit

1991-08-06

1994-09-20

Bocure, Tesfaldet

Pulse or digital communications

Spread spectrum

Direct sequence

375110, H04L 700, H04L 702

Patent

active

053496108

ABSTRACT:
A circuit for detecting digital data has a data-changing point detecting circuit for detecting a changing point of the digital data at which a value indicative of the digital data is changed from value 1 to value 0, or value 0 to value 1; an asynchronous detecting circuit for judging whether or not the changing point is caused at a timing synchronized with the timing of the internal clock signal; an asynchronous counter for counting the number of asynchronizations; a synchronous signal generating counter for generating a synchronous signal by the internal clock signal; and a reset control circuit for controlling the timing of a reset operation of the synchronous signal generating counter in accordance with outputs of the data-changing point detecting circuit and the asynchronous counter. Another digital data detecting circuit and a method for detecting digital data are also shown.

REFERENCES:
patent: 4029905 (1993-06-01), Abraham
patent: 4227251 (1980-10-01), Kazama et al.
patent: 4752942 (1988-06-01), Iwakami
patent: 4920546 (1990-04-01), Iguchi et al.

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