发明名称 |
Method and apparatus for clock skew calibration in a clock and data recovery system using multiphase sampling |
摘要 |
Methods and apparatus are provided for clock skew calibration in a clock and data recovery system. One aspect of the invention compensates for skew among a plurality of clocks in a clock and data recovery system. The clocks are applied to a plurality of latches to sample an incoming signal. A reference signal, such as a Nyquist signal, is applied to a data input of each of the latches. Statistics of "early" and "late" corrections applied to at least one of the clocks by a bang-bang phase detector in the clock and data recovery system are evaluated and a delay of a clock buffer associated with the at least one clock is adjusted to obtain approximately a 50% early-to-late ratio for the at least one clock. The clock and data recovery system ensures that the early-to-late ratio for the sum of the plurality of clocks is approximately 50%.
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申请公布号 |
US2008080649(A1) |
申请公布日期 |
2008.04.03 |
申请号 |
US20060529002 |
申请日期 |
2006.09.28 |
申请人 |
GIBBONS TOM;PAIST KENNETH W;TRAFFORD MARK;WILSON WILLIAM B |
发明人 |
GIBBONS TOM;PAIST KENNETH W.;TRAFFORD MARK;WILSON WILLIAM B. |
分类号 |
H04L7/00;H03D3/24 |
主分类号 |
H04L7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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