Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1992-08-13
1994-10-25
Chin, Stephen
Pulse or digital communications
Spread spectrum
Direct sequence
375111, H04L 704
Patent
active
053596307
ABSTRACT:
A method and device for receiving data in a synchronous communication system. Data can be accurately transferred between two subsystems in a synchronous system even where the clock skew and propagation delay between the two subsystems is unlimited. The receiving subsystem is initialized to ensure synchronous data transfer over a theoretically infinite range. The transmitting subsystem transmits data and a forwarded clock to the receiving subsystem. Data is captured in three state devices arranged in parallel to eliminate minimum delay requirements and to expand data valid time. The captured data is then aligned to the clock of the receiving subsystem by controlling a multiplexer which selects the proper state device output to pass to another state device for alignment to the receiving subsystem's clock. The multiplexer is controlled by a circuit which monitors the capturing of the incoming data and determines the correct state device output to select for proper data alignment.
REFERENCES:
patent: 3622885 (1971-11-01), Kruszynski et al.
patent: 4119796 (1978-10-01), Jones
patent: 4404680 (1983-09-01), Perkins
patent: 4430745 (1984-02-01), Betts
patent: 4637018 (1987-01-01), Flora et al.
patent: 4641318 (1987-02-01), Addeo
patent: 4642791 (1987-02-01), Mallozzi et al.
patent: 4656612 (1987-04-01), Allan
patent: 4692932 (1987-09-01), Denhez et al.
patent: 4694291 (1987-09-01), Denhez et al.
patent: 4694294 (1987-09-01), Suzuki et al.
patent: 4700347 (1987-10-01), Rettberg et al.
patent: 4707842 (1987-11-01), Fisher
patent: 4714924 (1987-12-01), Ketzler
patent: 4754164 (1988-06-01), Flora et al.
patent: 4771441 (1988-09-01), Spengler et al.
patent: 4779093 (1988-10-01), Watkins
patent: 4782499 (1988-11-01), Clendening
patent: 4811364 (1989-03-01), Sagar et al.
patent: 4881165 (1989-11-01), Sagar et al.
patent: 4885485 (1989-12-01), Leake et al.
patent: 4979190 (1990-12-01), Sagar et al.
patent: 5115455 (1992-05-01), Samaras et al.
H. M. Rein et al., Electronic Letters, "3.8 Gbit/s Bipolar Master/Slave D-Flip-Flop IC as a Basic Element for High-Speed Optical Communication Systems," vol. 22, No. 10, (May 8, 1986) pp. 543-544.
Sager David J.
Varpahovsky Andrey
Wade Paul C.
Casey Mark J.
Cefalo Albert P.
Chin Stephen
Digital Equipment Corporation
Ghebretinsae T.
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