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发布时间: 2012-11-01
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IntroductionWhen designing switch mode power supplies (SMPS),undesirable noise and Electromagnetic Interference (EMI)are always present. Their effects are even more severe as theswitching frequency increases, especially in applicationsrequiring the use of small size transformer and capacitors.This application note describes the nature and sources ofEMI noise, and the design techniques used to reduce theirshortcomings. All the examples of the circuitry used arereferred to flyback topology however


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