Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1984-06-22
1986-02-25
Bookbinder, Marc E.
Pulse or digital communications
Spread spectrum
Direct sequence
371 47, 375120, H04L 704
Patent
active
045731721
ABSTRACT:
A programmable circuit is provided for the series-parallel transformation of a digital signal and application thereof to a digital video signal receiver, comprising a circuit for detecting the synchronizing words in the series digital signal, a phase comparator generating pulses I and I characteristic of the coincidences and non coincidences between the parallel clock signal generated by a programmable divider from the series clock signal and pulses characteristic of the times when synchronizing words are detected; a logic circuit receives the pulses from the phase comparator and transfers them to the sync control input of a programmable divider when a predetermined programmable number of successive non coincidences or coincidences has been detected. This logic circuit also has a disconnecting control input. This circuit is implanted in a prediffused integrated network.
REFERENCES:
patent: 3641274 (1972-02-01), Sasaki et al.
patent: 3936762 (1976-02-01), Cox, Jr.
patent: 4214124 (1980-07-01), Jarus
patent: 4242755 (1980-12-01), Gauzan
patent: 4414676 (1983-11-01), Kraul
patent: 4453260 (1984-06-01), Inagawa et al.
Bookbinder Marc E.
Thomson - CSF
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