Drift tracking feedback for communication channels

Electrical computers and digital processing systems: support – Synchronization of clock or timing signals – data – or pulses – Using delay

Reexamination Certificate

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C713S503000

Reexamination Certificate

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11243032

ABSTRACT:
A communication channel includes a first component having a transmitter coupled to a normal signal source, and a second component having a receiver coupled to a normal signal destination. A communication link couples the first and second components. Calibration logic provides for setting an operation value for a parameter of the communication channel, such as by executing an exhaustive calibration sequence at initialization of the link. A tracking circuit, including a monitoring function, tracks drift in the parameter by monitoring a feedback signal that has a characteristic that correlates with drift in the communication channel, and updates, or indicates the need for updating of, the operation value of the parameter in response to the monitoring function.

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