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US 2004/0017871 A1Published application
Techniques to regenerate a signal
AssigneeIntel Corporation
InventorsSteen B. Christensen, Casper Dietrich
Life of this patent
Estimating the term…
Abstract
A signal regenerator that reduces noise in a reference clock signal.
Claims18
A method comprising:
- generating a first phase comparison between first and second signals, wherein the first and second signal both have a frequency of approximately F1;
- adjusting a phase of a third signal based upon the first phase comparison, wherein the frequency of the third signal, F2, is less than F1;
- generating a fourth signal by adjusting the frequency of the second signal to approximately match frequency F2;
- generating a second phase comparison between the third signal and the fourth signal;
- adjusting a phase of the second signal using the second phase comparison;
- and
- providing samples of the first signal based upon the phase adjusted second signal.
4 more elements
An apparatus comprising:
- a phase comparator to compare phases of first and second signals and to output a first phase comparison;
- a charge pump to output a control signal to modify a phase of the second signal based upon the first phase comparison;
- a loop filter to selectively transmit the control signal in response to detection of the control signal within a pass band of the loop filter;
- and
- a clock source to generate the second signal based upon a clock signal, wherein the clock signal has a lower frequency than the second signal.
2 more elements
A system comprising:
- a layer two device to output a first signal;
- a phase comparator to compare phases of first and second signals and to output a first phase comparison and to output samples of the first signal based upon the second signal;
- a charge pump to output a control signal to modify a phase of the second signal in response to the first phase comparison;
- a loop filter to transfer the control signal when the control signal has a frequency within a pass band of the loop filter;
- and
- a clock source to generate the second signal based upon a clock signal, wherein the clock signal has a lower frequency than the second signal.
3 more elements
Dependencies are inferred from the claim text.