Method and circuit for rapid alignment of signals
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United States of America Patent
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Nov 13, 2007
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app pub date -
Mar 22, 2005
filing date -
Mar 25, 2004
priority date (Note) -
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Abstract
Circuits and methods for aligning two or more signals including a first and second signal. In one embodiment, a shift register generates two or more shifted copies of the second signal, and each of a plurality of phase detectors receives the first signal and one of the shifted copies of the second signal, each phase detector providing an output indicating whether the first signal is substantially aligned with the shifted copy of the second signal. A multiplexer may also be provided for receiving each of the shifted copies of the second signal, the multiplexer having a plurality of select lines coupled with the output signals of the phase detectors. Some embodiments may include a power saving mode.
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