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Advanced spread spectrum clock generation technique for EMI reduction of multiple clock sources
Advanced spread spectrum clock generation technique for EMI reduction of multiple clock sources
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机译:先进的扩频时钟生成技术可降低多个时钟源的EMI
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摘要
The present invention describes a method and apparatus for reducing EMI emission in a multi source electronic system. The phase of the modulated waveform is varied to minimize the number of clocks within the EMI measurement bandwidth. The phase of the modulated waveform is varied in proportion to the number of EMI generating sources in the electronic system. The spread-spectrum clock is used as reference for phase delay of the modulated waveform. The phase delay can be predetermined or dynamically programmed according to the number of the EMI sources in the electronic system.
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