发明授权
US07724857B2 Method and apparatus for improving linearity in clock and data recovery systems
有权
提高时钟和数据恢复系统线性度的方法和装置
- 专利标题: Method and apparatus for improving linearity in clock and data recovery systems
- 专利标题(中): 提高时钟和数据恢复系统线性度的方法和装置
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申请号: US11375828申请日: 2006-03-15
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公开(公告)号: US07724857B2公开(公告)日: 2010-05-25
- 发明人: Christopher Abel , Joseph Anidjar , Vladimir Sindalovsky , Craig Ziemer
- 申请人: Christopher Abel , Joseph Anidjar , Vladimir Sindalovsky , Craig Ziemer
- 申请人地址: US PA Allentown
- 专利权人: Agere Systems Inc.
- 当前专利权人: Agere Systems Inc.
- 当前专利权人地址: US PA Allentown
- 代理机构: Mendelsohn, Drucker & Associates, P.C.
- 代理商 David L. Cargille; Steve Mendelsohn
- 主分类号: H04L7/00
- IPC分类号: H04L7/00
摘要:
Disclosed is a system and method for improving the linearity of a clock and data recovery (CDR) circuit. In one embodiment, a data stream is received, and the phase of a clock signal is adjusted using two interpolators. The phase of the output signal of the second interpolator is adjusted simultaneously with, and complementary to, adjusting the phase of the first interpolator. The first interpolator's output signal is injected into a first delay cell in a delay loop having a plurality of delay cells, and the output of the second interpolator is inactivated. When the maximum phase of the first interpolator's output signal is reached, the second interpolator's output signal is injected into another one of the delay cells, and the first interpolator's output signal is inactivated. The data stream is then recovered using the output of the delay loop as a clock signal.
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