资源描述：
《电子产品电磁兼容性设计探讨（discussion on emc design of electronic products）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、电子产品电磁兼容性设计探讨（DiscussiononEMCdesignofelectronicproducts）Thepurposeofthedesignofelectromagneticcompatibilityofelectronicandelectricalproducts,theelectronicandelectricalproductscanworknormally,canreducethefaultorasexualintheintendedelectromagneticenvironment,butalsoforanythinginthe
2、electromagneticenvironmentdoesnotconstitutetheabilityofelectromagneticdisturbance.ThebasicmethodsofEMCdesignforelectronicandelectricalproductsaretargetallocationandfunctionblockdesign.Thatistosay,firstaccordingtotherelevantstandardsandnorms,theelectromagneticcompatibilityindexoft
3、heproductrequirementsisassignedtoeachfunctionblock,subdividedintoproductlevel,modulelevel,circuitlevelandcomponentlevelindicators;then,accordingtothefunctionandthelevelsofelectromagneticcompatibilityrequirementsaredesignedseparately.Takesomeprotectivemeasures.TodotheEMCdesignofel
4、ectronicandelectricalproducts,weshouldpayattentiontothefollowingeightproblems:First,theEMCdesignshouldbecarriedoutattheinitialstageofproductdevelopmentExperienceshowsthatforaproduct,ifrequiredtosolvetheproblemofelectromagneticcompatibilityinthedevelopmentcostis1,thentosettingthet
5、imeagain,mayneed10timesthecostofmassproductiontobe100times,andiftheusertouse,andthensolvetheproblemsfound,thecostmaybeashighas1000times.Thatistosay,iftheEMCdesigniscarriedoutintheinitialstageofproductdevelopment,theelectromagneticcompatibilityproblemof80%~90%canbesolvedbeforethed
6、esignisfinalized.Ifyouwaituntiltheproductionorusestagetosolve,notonlytechnicallydifficult,butalsocausegreatwasteofmanpowerandfinancialresources.Thus,foranykindofproduct,itisnecessarytosolvetheelectromagneticcompatibilityproblemassoonaspossible.Two,theselectionofactivedevicessucha
7、schipsandprintedcircuitboarddesignisthekeyFirstofall,wemustpayattentiontotheinherentsensitivecharacteristicsofchipandotheractivedevicesandelectromagneticinterferenceemissioncharacteristics,chipandotheractivedevicescanbedividedintotwocategories:tuningdevicesandbasicfrequencybandde
8、vices.Thetuningdevicebandpasscomponents,
