Timing signal synchronization device

Details Timing signal synchronization device Timing signal synchronization device

1980-05-29

1982-09-28

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 84, 329104, H04L 706

Patent

active

043521924

ABSTRACT:
A device for the synchronization of a local timing signal to permit the demodulation of a differential phase-modulated carrier in synchronous data transmission systems. On the basis of a limited signal of the modulated carrier and a timing signal whose frequency is equal to quadruple that of the carrier, a logic element circuit comprising EXCLUSIVE-OR gates and synchronized flip-flops carries out a sequence of correlations and supplies pulses representative of the position of the phase jumps. These pulses are only used for the phase and frequency of the local timing signal.

REFERENCES:
patent: 3599103 (1971-08-01), Nussbaumer
patent: 3727145 (1973-04-01), Huntstinger
patent: 3778727 (1973-12-01), Williams
patent: 3818346 (1974-07-01), Fletcher
patent: 3843931 (1974-10-01), Sarkilahti
patent: 4010323 (1977-03-01), Peck

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