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US 2012/0057626 A1Published application
Adaptation of crossing latch threshold
AssigneeLSI Corporation
InventorLizhi Zhong
Life of this patent
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Abstract
An apparatus including a bang-bang clock data recovery module and a decision feedback equalizer. The decision feedback equalizer is coupled with the bang-bang clock data recovery module. The apparatus is configured to reduce an effect on a settling point of the bang-bang clock and data recovery module due to coupling between the bang-bang clock and data recovery module and the decision feedback equalizer.
Claims20
An apparatus comprising:
- a bang-bang clock data recovery module;
- and
- a decision feedback equalizer coupled with said bang-bang clock data recovery module, wherein said apparatus is configured to reduce an effect on a settling point of said bang-bang clock and data recovery module due to coupling between said bang-bang clock and data recovery module and said decision feedback equalizer.
An apparatus comprising:
- means for performing bang-bang clock and data recovery;
- and
- means for performing decision feedback equalization coupled with said bang-bang clock and data recovery means, wherein said apparatus is configured to reduce an effect on a settling point of said bang-bang clock and data recovery means due to coupling between said bang-bang clock and data recovery means and said decision feedback equalization means.
A method for adaptation of a crossing latch threshold in a receiver comprising the steps of:
- (A) adapting a tap weight of a first tap of a decision feedback equalizer until convergence;
- (B) determining a coefficient value based on a feedback waveform of the first decision feedback equalizer tap;
- and
- (C) setting crossing latch threshold magnitudes of a bang-bang clock and data recovery module based upon the coefficient and the tap weight of the first decision feedback equalizer tap.
1 more element
Dependencies are inferred from the claim text.