Digital clock signal generator, chip, and method for generating spread-spectrum synchronous clock signals

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United States of America Patent

PATENT NO 11848679
APP PUB NO 20230123009A1
SERIAL NO

16975258

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Abstract

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The present application discloses a circuit for generating spread-spectrum synchronous clock signal. The circuit includes a frequency detector comprising a fraction controller configured to compare an input signal of a first frequency with a feedback signal of a second frequency in a loop of feedback to generate a first control signal and a second control signal alternately for determining a control word to track the first frequency and a phase-shift controller configured to register n levels for the first control signal and the second control signal to introduce n phase delays for changing a fraction part of the control word randomly to provide a broadened boundary. The circuit also includes a digitally controlled oscillator configured to generate a synthesized periodic signal based on a base time unit, the first frequency, and the control word, with the second frequency being locked within the broadened boundary of the first frequency.

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Patent Owner(s)

Patent OwnerAddress
BOE TECHNOLOGY GROUP CO LTD100015 NO 10 JIUXIANQIAO ROAD BEIJING CHAOYANG DISTRICT BEIJING CITY BEIJING CITY 100015
BEIJING BOE TECHNOLOGY DEVELOPMENT CO LTD100176 ROOM 407 BUILDING 1 NO 9 DIZE ROAD BEIJING ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE DAXING DISTRICT BEIJING BEIJING CITY BEIJING CITY 100176

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Wei, Xiangye Beijing, CN 40 43
Xiu, Liming Beijing, CN 71 565

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