Pulse or digital communications – Transceivers
Reexamination Certificate
2008-07-15
2008-07-15
Wang, Ted (Department: 2611)
Pulse or digital communications
Transceivers
C375S224000, C324S601000, C369S044270
Reexamination Certificate
active
07400670
ABSTRACT:
A method and system that provides for execution of a first calibration sequence, such as upon initialization of a system, to establish an operation value, which utilizes an algorithm intended to be exhaustive, and executing a second calibration sequence from time to time, to measure drift in the parameter, and to update the operation value in response to the measured drift. The second calibration sequence utilizes less resources of the communication channel than does the first calibration sequence. In one embodiment, the first calibration sequence for measurement and convergence on the operation value utilizes long calibration patterns, such as codes that are greater than 30 bytes, or pseudorandom bit sequences having lengths of 2N−1 bits, where N is equal to or greater than 7, while the second calibration sequence utilizes short calibration patterns, such as fixed codes less than 16 bytes, and for example as short as 2 bytes long.
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JEDEC Standardȁ
Hampel Craig E
Perego Richard E
Ware Frederick A.
Haynes Beffel & Wolfeld LLP
Rambus Inc.
Wang Ted
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