Phase frequency detector with limited output pulse width and method thereof
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United States of America Patent
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Nov 2, 2010
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app pub date -
Jul 8, 2008
filing date -
Apr 6, 2006
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Abstract
Phase frequency detectors with limited output pulse width and related methods are provided. On exemplary phase frequency detector includes a first edge detector, a second edge detector, and a pulse reshaping controller. The first edge detector is for detecting first-type edges of a first signal to generate a first detection signal. The second edge detector is for detecting the first-type edges of a second signal to generate a second detection signal. The pulse reshaping controller is for receiving the first detection signal and the second detection signal, and for generating a first control signal to the first edge detector and generating a second control signal to the second edge detector. In addition, the pulse reshaping controller further generates a first output signal and a second output signal, wherein a pulse width of the first output signal is limited by the pulse reshaping controller.
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