Clock-generating device and clock data recovery device
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United States of America Patent
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Oct 20, 2015
Grant Date -
Sep 17, 2015
app pub date -
Aug 6, 2013
filing date -
Sep 14, 2012
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Abstract
A clock data recovery device 1 generates a recovered clock Recovered Clock and recovered data Recovered Data based on an input signal Data In, and includes a signal selector 10, a phase delay unit 20, a time measurement unit 30, a phase selector 40, an edge detector 50, a polarity detector 60, a logic inverter 70, and a data output unit 80. The signal selector 10, the phase delay unit 20, the time measurement unit 30, and the phase selector 40 constitute a clock-generation device 1A. The phase delay unit 20 includes a plurality of cascaded delay elements 211 to 21P. The phase selector 40 selects a signal output from the delay element in a position corresponding to a unit interval time among the delay elements 211 to 21P, and outputs the signal as a feedback clock Feedback Clock.
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