Method and apparatus for delay line control using receive data

Details Method and apparatus for delay line control using receive data Method and apparatus for delay line control using receive data

2008-07-15

2008-07-15

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S158000

Reexamination Certificate

active

07400181

ABSTRACT:
Methods and apparatus are provided for delay line control using receive data. A delay in a Delay-Locked-Loop circuit is controlled by obtaining a plurality of samples of one or more received signals for each unit interval; determining a data eye width in the one or more received signals; and adjusting a delay of at least one clock signal based on the data eye width. For example, the measured data eye width can be compared to a predefined value, such as a desired or ideal value. Generally, the delay is not adjusted in accordance with the present invention until the Delay-Locked-Loop circuit has reached a locked condition based on one or more predefined criteria.

REFERENCES:
patent: 2002/0085656 (2002-07-01), Lee et al.
patent: 2005/0108600 (2005-05-01), Arguelles
patent: 2005/0157780 (2005-07-01), Werner et al.
patent: 2006/0114039 (2006-06-01), Freyman et al.
patent: 2007/0002990 (2007-01-01), Lee et al.

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