Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1988-08-19
1989-10-10
Shepperd, John W.
Pulse or digital communications
Spread spectrum
Direct sequence
375106, 375107, H04L 700
Patent
active
048737038
ABSTRACT:
A synchronizing system is provided for reliably passing data across a boundary between two independent, non-correlated clocks, referred to as the receiving and transmitting clocks. The system reduces occurrence of errors due to asynchronous samplings to an arbitrarily low level based on metastable operation. The system is organized as a two port memory with unit distance code addressing the memory cells. It performs a handshake between the two non-correlated clock systems to allow for any ratio between the two clocks.
REFERENCES:
patent: 4320515 (1982-03-01), Burton, Jr.
"General Theory of Mestable Operation", Leonard R. Mariono, IEEE Transactions on Computers, vol. c-30, No. 2, Feb. 1981, pp. 107-115.
"Anomalous Behavior of Synchronizer and Arbiter Circuits", Thomas J. Chaney, Charles E. Molnar, IEEE Transactions on Computers, Apr. 1973, pp. 421-422.
"Circuit Technology in a Large Computer System", D. J. Kinniment, D. B. G. Edwards, The Radio and Electronic Engineer, vol. 43, No. 7, Jul. 1973.
Cavanna Vicente
Crandall Douglas
Nordby Rasmus
Shankar Pradip
Hewlett--Packard Company
Parker Michael D.
Shepperd John W.
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