Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1989-03-09
1991-06-04
Safourek, Benedict V.
Pulse or digital communications
Spread spectrum
Direct sequence
328 61, 328 63, H03L 700
Patent
active
050220578
ABSTRACT:
A telephone exchange system has a plurality of bit synchronization circuit each provided for an individual subscriber's line. A single clock generating circuit which generates a plurality of clocks is provided in common to the plurality of bit synchronization circuits. The bit synchronization circuit selects one clock of a phase suitable for regenerating an input data signal among the plurality of clocks applied thereto by the clock generating circuit, and regenerates and phases the input data signal by using the selected clock.
REFERENCES:
patent: 4095051 (1978-06-01), Crue
patent: 4386323 (1983-05-01), Jansen
patent: 4575860 (1986-03-01), Scordo
patent: 4780889 (1988-10-01), Ley et al.
patent: 4821296 (1989-04-01), Cordell
Komatu Norihumi
Nishi Yumiko
Takaki Seiichi
Torii Yutaka
Hitachi , Ltd.
Hitachi Communication Systems, Inc.
Safourek Benedict V.
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