Reliable phase adjustment circuit

Details Reliable phase adjustment circuit Reliable phase adjustment circuit

2008-04-22

2008-04-22

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Phase shift by less than period of input

C327S321000

Reexamination Certificate

active

07362156

ABSTRACT:
A phase adjustment circuit generates multiple clock signals by, for example, successively delaying a first clock signal. One of the generated clock signals is selected and output. A phase difference detector determines whether the phase of the selected clock signal and the phase of a second clock signal satisfy a given condition. The clock signal selection can changed until the condition is satisfied, either by external control by a device that monitors a signal output by the phase difference detector, or by a built-in selection signal generator. This scheme assures that two clock signals with phases satisfying the given condition are obtained, regardless of environmental factors or fabrication variations.

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patent: 6348823 (2002-02-01), Pan
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patent: 6959061 (2005-10-01), Kuwata
patent: 2003/0001634 (2003-01-01), Cao et al.
patent: 5026923 (1993-02-01), None
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patent: 2002-111486 (2002-04-01), None
Excerpt Translation Reference No. KA003866 Mailing No. 460280 Mailing Date Dec. 6, 2006.

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