Invention Grant
- Patent Title: Receiver with clock recovery circuit and adaptive sample and equalizer timing
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Application No.: US16714178Application Date: 2019-12-13
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Publication No.: US11063791B2Publication Date: 2021-07-13
- Inventor: Qi Lin , Brian Leibowitz , Hae-Chang Lee , Jihong Ren , Kyung Suk Oh , Jared L. Zerbe
- Applicant: Rambus Inc.
- Applicant Address: US CA Sunnyvale
- Assignee: Rambus Inc.
- Current Assignee: Rambus Inc.
- Current Assignee Address: US CA Sunnyvale
- Agency: Silicon Edge Law Group LLP
- Agent Arthur J. Behiel
- Main IPC: H04L25/03
- IPC: H04L25/03 ; H04L7/00 ; H04L7/033 ; H04L12/26

Abstract:
A receiver is equipped with an adaptive phase-offset controller and associated timing-calibration circuitry that together shift the timing for a data sampler and a digital equalizer. The sample and equalizer timing is shifted to a position with less residual inter-symbol interference (ISI) energy relative to the current symbol. The shifted position may be calculated using a measure of signal quality, such as a receiver bit-error rate or a comparison of filter-tap values, to optimize the timing of data recovery.
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