Circuit for detecting a synchronizing signal

Details Circuit for detecting a synchronizing signal Circuit for detecting a synchronizing signal

1988-12-20

1990-12-18

Safourek, Benedict V.

Pulse or digital communications

Spread spectrum

Direct sequence

360 51, H04L 704

Patent

active

049791923

ABSTRACT:
A circuit for detecting a synchronizing signal comprises a gate circuit to which a reproduced synchronizing signal and a window signal are supplied. A first counter synchronized with an output signal from the gate circuit counts a clock signal formed from the reproduced signal and generates an insertion synchronizing signal. A second counter synchronized with the output signal from the gate circuit counts a fixed clock signal and generates the window signal. The output signal from the gate circuit or the insertion synchronizing signal is made a synchronizing detection signal. The frame synchronizing signal can thus be detected stably and reliably.

REFERENCES:
patent: 4453260 (1984-06-01), Inazawa et al.
patent: 4620300 (1986-10-01), Ogawa
patent: 4872155 (1989-10-01), Yokogawa et al.

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