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AN-1737 Managing EMI in Class D Audio ApplicationsAN-1737管理D类音频应用中地EMI.pdf

AN-1737 Managing EMI in Class D Audio ApplicationsAN-1737管理D类音频应用中地EMI.pdf

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时间：2020-03-27

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1、ApplicationReportSNAA050A–November2007–RevisedMay2013AN-1737ManagingEMIinClassDAudioApplications.....................................................................................................................................................ABSTRA

2、CTElectromagneticinterference(EMI)isanunwanteddisturbancecausedinanelectricalcircuitbyelectromagneticradiationemittedfromanexternalsource.Thedisturbancemayinterrupt,obstruct,orotherwisedegradetheeffectiveperformanceofthecircuit.Contents1EMI-TheBasics.

3、...........................................................................................................22TheClassDAudioAmplifier..............................................................................................33CounteringEMI..........

4、....................................................................................................44References...................................................................................................................6ListofFigures1Wavelengt

5、hasaFunctionofFrequency................................................................................22CommonAntennas.........................................................................................................23UnintendedAntennasinPCBs.

6、...........................................................................................34TheClassDAudioAmplifierPWM.......................................................................................45ResistanceandInductanceasaFunctionofFrequen

7、cy..............................................................56ComparisonofFixed-FrequencyandSpread-SpectrumModulation.................................................57LM48511-ASpread-SpectrumModulatedClassDAmplifier...............................

8、.........................6Alltrademarksarethepropertyoftheirrespectiveowners.SNAA050A–November2007–RevisedMay2013AN-1737ManagingEMIinClassDAudioApplications1SubmitDocumentationFeedbackCopyright©2007–2013,TexasInstrumentsIncorporatedEMI-TheBasi

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