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1、TheEffectofWindingsonADSLTransformerInsertionLossesMar.2唧JournalofElectronicScienceandTechnologyofChinaV.o1.5No.1TheEffectofWindingsonADSLTransformerInsertionLossesJIANGXiao.na,LANZhong-wen,CHENSheng-ming2,ZHANGHuai-wu,SUHua1.StateKLab0咖ofElectronicThinFilmsandIntegratedDevices.UniversityofElectron
2、icScienceandTechnologyofChinaChengdu610054China2.CenterofMagneticMaterialandDccEngineeringTechnologyofJiangsuWuxi214199JiangsuC~lillaAbstractInsertionlossOm)isoneoftheimportantparametersofasymmetricaldigitalsubscriberloop(ADSL)transformers.Indifferentfrequencyban凼,thefactorsthataffectinsertionlossa
3、redifferent.WilIdingsmainlyaffectinsertionlossinmidandhighfrequencybands.Theeffectsofwindingways,windingwirediameterandwindingturnsoninsertionlosswerediscussed.ThepresentedexperimentshowsthattheinsertionlossofanADSLt
4、ransformercouldbeunder0.4dBinmidfrequencybandwhenthewindingis30turns,inwhichtheADS
5、Ltransformersatisfiestherequirementoftotalharmonicdistortion(TnD).Ourexperimentsalsoshowthatthesandwichwindingstructureisbetterthanthesidebysidewindingstructureandthetwisted-pairwindingstructure,andtheincreaseofwindingdiameterisonemeanstoreduceinsertionlossesofanADSLtransformerinmidfrequencyban&
6、;Keywordsasymmetricaldigitalsubscriberloop;insertionloss;transformer;windingInanasymmetricaldigitalsubscriberloop(hDSL)system,theADSLtransformer,asaninterfacebetweentransceiversandtransmissionlines.canbeusedinthechipsetofmodemsorisolationdevices.ADSLtransformersarelowpowerandlinear,andtheyarediffer
7、entfrompowertransformers.Themainfunction0fADSLtransformeriscouplingthetransmissioninformationbetweentransceiversandtransmissionlines.S0ADSLtransformersshouldhavehighqualitiessoastotransmitinformationwithlowlOSSanddistortiont".AtthesaHletime,ADSLtransformersshouldsupplyDCisolation,impedancematch,ele
8、ctricinsulation,andaccurateratioofvoltageorcurrentbetweenthebothsidesofADSLtransformer,ete.AnADSLtransformerwillbringinsertionlOSSwhenitisputinsystemcircuits.Indifferentfrequencybandsthefactorsthataffectins
