Synchronizing signal detecting apparatus

Details Synchronizing signal detecting apparatus Synchronizing signal detecting apparatus

1980-02-04

1982-10-26

Safourek, Benedict V.

Pulse or digital communications

Spread spectrum

Direct sequence

375113, 370100, 328 63, H04L 700

Patent

active

043565662

ABSTRACT:
A synchronizing signal detecting circuit for synchronizing digital data receiving equipment is disclosed. Digital signals consisting of data and synchronizing signals obtained by repeating a predetermined pulse pattern many times are fed to a shift register in succession in synchronism with clock pulses. A gate circuit connected to the shift register detects the synchronization pulse pattern. A detector circuit detects a duration period of a coincidence signal which is the output of the gate circuit, and outputs a synchronous detection signal when the duration period of the coincidence signal exceeds the predetermined value. This synchronizing signal detecting circuit can detect synchronizing signals even when data errors are produced to some extent.

REFERENCES:
patent: 3586776 (1971-06-01), Salava
patent: 3654390 (1972-04-01), Puckette
patent: 3801956 (1974-04-01), Braun
patent: 3878383 (1975-04-01), Uchida
patent: 3893033 (1975-07-01), Finch
patent: 3909724 (1975-09-01), Spoth
patent: 3941930 (1976-03-01), Mohri
patent: 4099048 (1978-07-01), Eichenlaub

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