标签: choke

利用磁环设计电感（choke）的简易步骤.doc

MoldingChoke  生产商有美Vishay，日系的muRata；中国台湾的乾坤和奇力新。预估这几大厂商的产能约占全球80%以上，行业集中度高。最近几年中国大陆电感厂商加大研収力度，麦捷、金籁、、德珑、华立、达嘉等企业，已经开収出一系列型号的一体化成型电感，英麦科在薄膜工艺有重大突破，已经完成2016，2520量产；1418 1608预计Q2量产；预计未来将有更多系列的产品实现国产化。型号实现了国产突破，预计未来将有更多系列的产品实现国产化。

WhatisCommonmodechokecoilsCommonmodechokecoiltosolveEMInoiseproblems共模扼流圈解决EMI噪音问题MurataManufacturingCo.,Ltd1Structure/结构Commonmode(Noise)共模噪音DLW/DLP共模扼流圈CommonmodechokecoilMurataManufacturingCo.,Ltd2MechanismofNoiseSuppression共模扼流圈降噪原理DifferentialSignalCurrent差分信号电流差分信号电流产生相反方向的磁场,故阻抗值几乎为零D+D-CommonModeNoiseCurrent共模噪音电流共模噪音电流产生的磁场方向相同,故阻抗值是加强的.D+D-MurataManufacturingCo.,Ltd3DCEMIFilters直流电磁干扰滤波器TypicalApplication典型应用1.ForDifferentialModeSignalLineUSB,IEEE1394,LVDS差分信号线USB,IEEE1394,LVDS2.ForHeadPhoneLine&AudioAmplifierImmunity耳机线和音频放大电路3.ForDifferentialModeSignalLineHDMI差分信号线HDMI4.PowerSupplyLine电源线MurataManufacturingCo.,Ltd4USB&SignalWaveformofDifferentialModeUSB和差分模式的信号波形……

ChokenetworkdesignNotesOnChokeNetworkDesignApplicationNoteA001DCBIASCIRCUITRY/SUPPLYIntroductionChokenetworksaresectionsofhighfrequencycircuitswhosepurposeistoensurethatthecorrectDCoperatingpoint(VIN,IIN,VOUT,IOUT)issuppliedtoanactivedevicewithoutallowingtheDCsupplycircuitrytopresentanimproperhighfrequencyterminationtothatdevice.TheyserveafunctionthatiscomplementarytothatofDCblockingcapacitors,whichpreventthehighfrequencysourceandloadresistancesfromimproperlyloadingtheDCsupplycircuitrywhilestillpassingtheACinputandoutputsignals.CircuitdesignersoftenthinkofchokesystemsasDCpassnetworksthataresimultaneouslyhighfrequencyrejectnetworks.Thisisanoversimplifieddefinitionthatcanleadthedesigner……