Invention Grant
US07649933B2 Method and apparatus for determining a position of an offset latch employed for decision-feedback equalization
有权
用于确定用于判决反馈均衡的偏移锁存器的位置的方法和装置
- Patent Title: Method and apparatus for determining a position of an offset latch employed for decision-feedback equalization
- Patent Title (中): 用于确定用于判决反馈均衡的偏移锁存器的位置的方法和装置
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Application No.: US11414522Application Date: 2006-04-28
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Publication No.: US07649933B2Publication Date: 2010-01-19
- Inventor: Christopher J. Abel , Mohammad S. Mobin , Gregory W. Sheets , Vladimir Sindalovsky , Lane A. Smith
- Applicant: Christopher J. Abel , Mohammad S. Mobin , Gregory W. Sheets , Vladimir Sindalovsky , Lane A. Smith
- Applicant Address: US PA Allentown
- Assignee: Agere Systems Inc.
- Current Assignee: Agere Systems Inc.
- Current Assignee Address: US PA Allentown
- Agency: Ryan, Mason & Lewis, LLP
- Main IPC: H03H7/30
- IPC: H03H7/30 ; H03H7/40 ; H03K5/159

Abstract:
Methods and apparatus are provided for determining a position of an offset latch employed for decision-feedback equalization. The position of an offset latch is determined by obtaining a plurality of samples of a data eye associated with a signal, the data eye comprised of a plurality of trajectories for transitions out of a given binary state; determining an amplitude of at least two of the trajectories based on the samples; and determining a position of an offset latch based on the determined amplitudes. The initial position of the offset latch can be placed, for example, approximately in the middle of the determined amplitudes for at least two of the trajectories. The initial position of the offset latch can be optionally skewed by a predefined amount to improve the noise margin.
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