Spread spectrum clock generation circuit, clock transfer circuit, integrated circuit, and image reading apparatus

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United States of America Patent

PATENT NO 9639114
APP PUB NO 20150052379A1
SERIAL NO

14446415

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Abstract

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A spread spectrum clock generation circuit includes a generation unit configured to generate and output a spread spectrum clock based on an input reference clock, a monitoring unit configured to monitor a difference between the number of pulses of a reference clock input to the generation unit after a reference time and the number of pulses of a spread spectrum clock output from the generation unit after the reference time, and a control unit configured to control a frequency of a spread spectrum clock to be generated by the generation unit so as to make the difference fall within a predetermined range.

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Patent Owner(s)

  • CANON KABUSHIKI KAISHA

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Shirai, Takahiro Isehara, JP 43 226

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