Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1990-06-29
1992-05-19
Safourek, Benedict V.
Pulse or digital communications
Spread spectrum
Direct sequence
375111, H04L 704
Patent
active
051154552
ABSTRACT:
Data can be accurately transmitted between two subsystems in a synchronous system even if the clock skew or propagation delay between the two subsystems is greater than one clock cycle time. The source and destination subsystems are initialized to ensure synchronous operation. The source subsystem transmits data and a forwarded clock to the destination subsystem. The forwarded clock is passed through a delay device to introduce a one-half cycle delay into the forwarded clock timing. 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 destination subsystem's clock by controlling a multiplexer which selects the proper signal at its input to pass to the input of a second state device coupled to its output. The data selected is then clocked into the second state device under the control of the distination subsystem's clock, thus aligning the received data with the destination subsystem's clock.
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: 4692932 (1987-09-01), Denhez et al.
patent: 4700347 (1987-10-01), Rettberg et al.
patent: 4714924 (1987-12-01), Ketzler
patent: 4754164 (1988-06-01), Flora et al.
patent: 4811364 (1989-03-01), Sager et al.
patent: 4881165 (1989-11-01), Sager et al.
patent: 4979190 (1990-12-01), Sager et al.
Ingraham Andrew D.
Samaras William A.
Vaughan David T.
Digital Equipment Corporation
Safourek Benedict V.
LandOfFree
Method and apparatus for stabilized data transmission does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for stabilized data transmission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for stabilized data transmission will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2420019