Synchronization of clocks in digital signalling networks

Details Synchronization of clocks in digital signalling networks Synchronization of clocks in digital signalling networks

1975-02-20

1976-02-03

Libman, George H.

Telegraphy

Systems

Line-clearing and circuit maintenance

179 15BS, 325 58, 328133, H04L 700

Patent

active

039366049

ABSTRACT:
In a digital signalling network of the kind in which only data pulses are transmitted among the different stations, and more than one of the stations includes means for producing clock signals, synchronization of the network is achieved by producing at each station, in response to received data pulses, derived clock signals at the same rates as the clock signals produced at each of the other stations. Each station scans all available clock signals, its own and all those derived from the incoming data signals, compares the scanned signals one by one with its own operating rate, and adjusts the rate to conform to the slowest signal. The signals of concern are time-spaced electrical pulses, and rate comparison is accomplished by counting.

REFERENCES:
patent: 3457372 (1969-07-01), Karnaugh
patent: 3467779 (1969-09-01), Duerdoth

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