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spread spect
Spread spectrum is a common technique used to resolve EMI problems. Frequency is purposely varied to spread emitted EMI energy over different frequencies. The graph on the right shows a red line with higher peak energy and without spread spectrum. The blue line shows how spread spectrum modulation lowers EMI by spreading it across other frequencies. As shown, EMI on the carrier frequency is reduced by 17 dB. In addition to down spread, SiTime provides center spread options that change the spread width to meet the application needs.
PTM Published on: 2017-07-13