Invention Grant
US09356775B1 Clock data recovery (CDR) phase walk scheme in a phase-interpolater-based transceiver system
有权
在基于相位插值器的收发机系统中的时钟数据恢复（CDR）相位行进方案
- Patent Title: Clock data recovery (CDR) phase walk scheme in a phase-interpolater-based transceiver system
- Patent Title (中): 在基于相位插值器的收发机系统中的时钟数据恢复（CDR）相位行进方案
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Application No.: US14795169Application Date: 2015-07-09
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Publication No.: US09356775B1Publication Date: 2016-05-31
- Inventor: Yu Xu , Cheng-Hsiang Hsieh , Yohan Frans , Kun-Yung Chang
- Applicant: Xilinx, Inc.
- Applicant Address: US CA San Jose
- Assignee: XILINX, INC.
- Current Assignee: XILINX, INC.
- Current Assignee Address: US CA San Jose
- Agent Steven Roberts
- Main IPC: H04L7/033
- IPC: H04L7/033 ; H04L7/04
Abstract:
Methods and apparatus are described for synchronously stepping at least one of a data phase interpolator (PI) code or a crossing PI code in a clock and data recovery (CDR) circuit until one or more preset criteria are satisfied. One example method generally includes determining that a condition has been met; based on the determination, stepping, in a CDR circuit, at least one of a data PI code or a crossing PI code for each cycle of a clock; stopping the stepping based on one or more criteria to generate a predetermined state of the data PI code and the crossing PI code, wherein the predetermined state comprises an offset between the data PI code and the crossing PI code; receiving a data stream; and performing clock and data recovery on the data stream based on the offset between the data PI code and the crossing PI code.
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