SPREAD SPECTRUM CLOCK GENERATION APPARATUS AND METHOD FOR GENERATING SPREAD SPECTRUM CLOCK SIGNAL

WIPO Patent Application WO/2017/107901

A1

A spread spectrum clock generation apparatus (10), comprising: a monitoring module (13) for monitoring the depth of a first-in-first-out (FIFO) memory (12) and feeding the depth of the FIFO memory (12) back to a spread spectrum clock generator (SSCG) (14); the FIFO memory (12) for caching data; and the SSCG (14) for receiving a first clock signal (CLK1) and the depth, fed back by the monitoring module (13), of the FIFO memory (12), adjusting the quantity of frequency division for the SSCG (14) according to the depth of the FIFO memory (12) so as to obtain adjusted quantity of frequency division, and performing spectrum spreading on the first clock signal (CLK1) according to the adjusted quantity of frequency division so as to generate a spread spectrum clock signal (SSC). By monitoring the depth of an FIFO memory (12) in real time, continuously adjusting the quantity of frequency division of a spread spectrum clock generator (SSCG) (14) according to the depth of the FIFO memory (12), then generating a spread spectrum clock signal (SSC) according to the adjusted frequency division quantity, a central frequency of the spread spectrum clock signal (SSC) at different time periods is alternately higher or lower, and thus a central frequency of the spread spectrum clock signal (SSC) at a whole time period remains stable.

XU JIEYANG (CN)
ZHANG BINGZHAO (CN)
LIU YONGWANG (CN)

PCT/CN2016/111085

June 29, 2017

December 20, 2016

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HUAWEI TECH CO LTD (CN)

H03L7/197; H03L7/18

CN102201810A	2011-09-28
CN101819451A	2010-09-01
CN1409490A	2003-04-09
US20100229019A1	2010-09-09
CN105634485A	2016-06-01
CN104426504A	2015-03-18

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