Drift tracking feedback for communication channels
First Claim
1. A method for calibrating a communication channel, including a first component, a second component, and a communication link coupling the first and second components, the communication channel having a parameter with an operation value, comprising:
- setting the operation value of the parameter of the communication channel in one of the first and second components;
distributing a reference signal to the first and second components;
monitoring, using monitor circuits in one of the first and second components, a signal from a medium outside the communication channel, the signal having a characteristic which drifts relative to the reference signal at said monitor circuits by amounts that correlate with drift of the parameter of the communication channel, to track the amounts of drift in the characteristic; and
in response to the monitoring, updating the operation value based on the amounts of drift in the characteristic of the signal.
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Accused Products
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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Citations
1 Claim
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1. A method for calibrating a communication channel, including a first component, a second component, and a communication link coupling the first and second components, the communication channel having a parameter with an operation value, comprising:
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setting the operation value of the parameter of the communication channel in one of the first and second components;
distributing a reference signal to the first and second components;
monitoring, using monitor circuits in one of the first and second components, a signal from a medium outside the communication channel, the signal having a characteristic which drifts relative to the reference signal at said monitor circuits by amounts that correlate with drift of the parameter of the communication channel, to track the amounts of drift in the characteristic; and
in response to the monitoring, updating the operation value based on the amounts of drift in the characteristic of the signal.
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Specification