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Phase walk method of clock data recovery (CDR) in phase interpolator based transceiver system
Phase walk method of clock data recovery (CDR) in phase interpolator based transceiver system
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机译:基于相位内插器的收发器系统中时钟数据恢复(CDR)的相移方法
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摘要
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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