EMC与电源时钟的“爱恨情仇”
一前言
我们生活中所接触的电子产品越来越多，而且随着生活水平的提高，各色各样的需求也越来越多，电子产品的功能也就会越来越齐全，功能多意味着模块就会增加，伴随着的就是功率的加大、高速信号的增加，电子线路板就会更加复杂，那么电磁环境就会越来越复杂化，而电子产品EMC问题都与两大模块息息相关，分别是：电源模块、时钟模块。
二、电源模块
要使电子产品工作就离不开电源这个部分，需要电源给到每个模块供电才能正常地运行，而每个模块所需要的供电电压又大相径庭，所以大部分产品会有DCDC或PMIC的开关电源模块，还有LDO。开关电源意味着会有突然变化的电压或电流，即dV/dt或dI/dt的变化率很大，这便是产生电磁干扰的所需条件。
图1 常见电磁干扰源
当电压或电流发生迅速变化时，就会产生电磁辐射现象，导致电磁干扰。
我们需要着重地去关注DCDC电源模块问题，在设计阶段就要考虑开关电源的EMC噪声干扰，可以从这几方面去考量：
1. 输入输出多做滤波手段，比如LC滤波、π型滤波、共模电感滤波;
2. 控制电源回路面积，尽可能做到越小越好，输入输出滤波电容的接地端要与DCDC芯片的地越靠近越好;3.减少或降低开关电源的纹波，DCDC干扰很大部分是由于电源纹波导致造成的高频噪声干扰，比如：
(1)在自举电容串联一个小电阻;
(2)在SW引脚加RC吸收电路等等抑制措施。
图2 原理图回路示意图
图3 电源Layout示意图
三、时钟模块
时钟的噪声干扰是电子工程师头痛的一个问题，是因为时域中周期性的信号对应频域中离散的频谱，所以时钟能量比较集中，是一个窄带噪声，也就比较容易超标，时钟噪声辐射超标是RE测试中最常见的一种问题。
图4 机器时钟超标数据
时钟倍频，RE测试中常见的就是时钟倍频超标，因为λ=u/f（波速(u)。
由波长 (λ) 和频率 (f）公式可看出频率越大，波长会越小，便能很容易产生耦合并通过一些走线、排线或者线束作为路径辐射出去，导致数据超出标准限值，我们便需要排查问题点，在源头或者路径进行抑制。接下来我们看看时钟的辐射问题有什么解决方案和建议：
图5 机器简易架构
1. 在时钟CLK上加RC滤波或者加磁珠与电容滤波（参数大小需参照时钟大小而定），且器件放置位置尽量靠近源头发射端；
2. 时钟走线本身辐射是最强的，所以走线越短越好且一定要全程包地线处理，能让时钟有较好的回流路径，高频的回路面积达到最小。
3. FPC排线上的干扰，排线是时钟辐射的良好天线，屏蔽性不好或无屏蔽效果的线束会导致辐射超标，建议可将排线进行屏蔽接地处理。一根屏蔽接地良好的排线，可以降低10-30db的辐射。
4. 可在时钟加展频IC或在主时钟加展频晶振，可根据时钟频率进行选择适配的展频IC，可以有效降低辐射干扰。
【展频技术】:
通过对尖峰时钟进行调制处理，使其从一个窄带时钟变为一个具有边带的频谱，将尖峰能量分散到展频区域的多个频率段，从而达到降低尖峰能量，抑制EMI的效果。
5. PCB上的长走线，靠近时钟线的走线很容易耦合到噪声，所以时钟线未包地的情况下，其他走线要远离时钟等高速信号，降低耦合程度。
四、总结
时钟与电源问题是我们EMC日常遇到最多的噪声问题，需要找到源头、路径，先确定问题点，可借助频谱仪、示波器等设备进行排查噪声源，借助工具准确无误地进行整改，这将使我们的整改事半功倍。
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本文由拾一转载自韬略科技EMC公众号，原文标题为:EMC与电源时钟的“爱恨情仇”，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。
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型号- 40D271K,P4SMA16A,SMAJ6.0CA,SMAJ40CA,SC3E6-300MM,SC30 SERIES,30KPA170CA,SMF10CA,KD-012,SCF035-30-1206R,SC2E6-350LSMD,5.0SMDJ170A,SCF1210,8.0SMDJ24A,SC3E5-600LM,SMDJ78CA,RCF300-1812R,SC3E8-150HMF,KD-015,SCGB-H SERIES,KD-025,KD-020,SCGB1005-B SERIES,SCF1206,5.0SMDJ300CA,SC3E6-420MM,1.5SMC13CA,SMCJ14CA,P4SMA18A,TH8S15CA,SCPB4516S600WTF,5.0SMDJ85A,SC2E8-2500LL,P4SMA16CA,SC2E8-250HL,SMCJ100CA,SC2E8-1600LL,20KPA48CA,53D112K,34S210K/40,SMBJ300A,5KP30A,SMF120CA,SMBJ150CA,SMDJ170A,8.0SMDJ26A,SCPB1608S301NPF,SMAJ70A,P4SMA520A,53D681K,SCF050-24-1206R,3KP80CA,SMDJ58A,32D122K,SA48CA,SMCJ30A,SC2H8-5000LL,SCGB1608H200HPF,SCGB1608H301EPF,SA180A,SCPB1068W471LPF,SMF190A,SA22CA,SCF110-1812,P6KE8.2CA,SMAJ100A,SC250-600,8.0SMDJ20A,SCF160-16-1812R,P4KE180A,5.0SMDJ170CA,SC2E8-250ML,SA110CA,30KPA54CA,P4SMA82CA,SC3E5-230LM,SMF3.3A,SMDJ54A,30KPA198A,SMDJ160CA,3KP14CA,20KPA180A,SMBJ400CA,5KP SERIES,SMF36CA,SCPB2012W221NPF,SMCJ80CA,SCF260-1812R,SCWL201610G-2R2ML,SC600,PXXXXLB,PXXXXLC,PXXXXLA,P6SMB51CA,P4KE22CA,53D241K,SMCJ220CA,8.0SMDJ22A,32D561K,SCPB4532S601QTF,SCWL201610H SERIES,TH8S28CA,15KPA40CA,5.0SMDJ80A,P4KE SERIES,1.5KE51A,SM6S SERIES,1.5SMC39CA,SM6S12A,SC3E8-800H,SC2E5-420LL,P6SMB,SA70CA,1.5KE36CA,SCF0805 SERIES,1.0SMBJ,TH8S33CA,15KPA100A,5KP36A,SCF150-1812R,SCA-601M,P6SMB16A,30KPA,SMAJ18CA,SA17CA,1.5KE170CA,SM6S11A,5KP90CA,SMF,SMDJ51A,3KP45CA,3KP140CA,P4SMA170A,TH8D33CA,P6SMB15A,SCGB3216S121丨TF,P4SMA10A,3KP58CA,SCGB3216S122HTF,1.5KE56A,SC2E8-75HSMD,1.5SMC440A,P6SMAJ,SC2E5-2700DL,SC2E6-90LSMD,SM6S14A,P6SMB520A,SA5.0CA,SCF160-1812,SM2KBF SERIES,SC2E5-300LL,5KP24CA,SCML2016G4R7MBE,SC2K8 SERIES,P6SMB16CA,P4SMA11A,SM6S13A,P6KE500A,SMBJ90A,SMF64A,SCPB2012S400RPF,SMBJ12CA,P6SMB13A,P4SMA12A,SCPB3216W121QTF,PXXXXSA SERIES,SM6S16A,SC2E8 SERIES,SC2E6-600LSMD,SC1812-420CSMD,P6SMB12A,TH8D20CA,SCF012-1206R,32D911K,P4SMA13A,SC2E6-420LSMD,P6KE180CA,P6SMB10A,SCGB2012S301HPF,SM6S15A,P4SMA47CA,SCML2012H2R2M05BP,P6SMB11A,KA-190,25D SERIES,P6SMB100CA,5.0SMDJ78CA,SC250-650,SCWL201610G-1R0ML,15KPA18CA,20D,P4KE400A,SCML2012H1R0MBE,SM6S18A,RCF160-1812,PXXXXTB SERIES,1.5KE10CA,SCF035-0805R,SCHB1608W241EPF,SC1206-90ASMD,34S850K/40,SMF60A,P4SMA15A,SCGB2012S102FPF,15KPA30A,SM6S17A,P6KE27CA,30KPA84A,SCB-141N,PXXXXEC,5KP33A,PXXXXEA,P6SMB82CA,PXXXXEB,15KPA180CA,SC2E8-150H,1.5SMC500CA,SC2E8-150M,5KP11CA,30KPA36CA,P4KE6.8CA,20KPA52CA,P6SMB47CA,1.5SMC250CA,SCHB1608-W SERIES,SCPB1005S100NPF,TH8S15A,SC3E5-75LSMD,P6SMB220CA,3KP140A,SC2E5-470L,SMDJ200CA,SMF70A,SMDJ190CA,15KPA24A,30KPA90A,1.5KE380CA,SC250-145T,3KP64A,P4KE20A,SMAJ48CA,SMBJ43CA,TPSMAJ SERIES,SCWL201610G-R47ML,53D SERIES,34S140K/40,SMCJ7.5A,SMAJ400A,SC1812-400CSMD+,30KPA71CA,SMF19CA,SA90A,30KPA102A,SMBJ18A,SCF035-1210R,1.5SMC75CA,25D,SMAJ300CA,P6KE220CA,SA40CA,SCF020-60-1812R,SCB-501M,15KPA22A,SC1812-350CSMD,TH8S16A,KA-170,SMBJ19A,SCGB3216S202ETF,20KPA96CA,SM6S20A,3KP9.0CA,S61089,SM6S,P6KE100CA,SMBJ16A,20KPA240CA,SMBJ30CA,P6SMB SERIES,SCWL252010H SERIES,5KP28A,SCGB1608H121EPF,30KPA108A,SMF110A,15KPA28A,SMAJ8.5CA,SC1210-420BSMD,SMAJ180A,P4KE100A,SC135-650,SCC-471M,SMBJ17A,SMF85CA,SMBJ120CA,5.0SMDJ220A,SM5S,SM8E,SM8S16CA,SM6S22A,20KPA120CA,5KP8.0A,1.5SMC10A,SC2E5-3500D,SC3E6-230M,3KP75CA,SMBJ14A,SM8S,P6SMB18A,SMDJ16CA,SCGB1608S221FPF,SMBJ130A,1.5SMC130CA,5.0SMDJ350A,SCPB1608S601LPF,15KPA26A,15KPA48CA,SMDJ440CA,34S350K/40,5KP120CA,SCGB1005S200FPF,SA100A,SMBJ15A,SCF125-2920R,SMAJ170CA,KA-133,SCWL252010G-R47ML,15KPA180A,30KPA260CA,SMBJ12A,SMAJ6.0A,P6KE62CA,SC3E8-150HP,SC250-1000S,TPSMEJ,SC3E8-150HM,1.5SMC91A,SA7.5CA,5.0SMDJ78A,SMCJ7.0A,SMDJ51CA,15KPA22CA,5.0SMDJ48CA,SMBJ13A,SCBE-471M,SC2E8-150MSMD,TPSMDJ,P6KE75A,P4SMA220A,KB-380,34S440K/65D,SMCJ150A,20KPA172A,SC1210-350BSMD,SC1812-90CSMD,TPSMCJ,SA6.0A,SCF200-1812R,5KP8.5A,SMAJ78A,KA-100,SC3E8-800HM,5KP120A,SC3E8-800HP,SMBJ10A,SMBJ11A,P4KE27A,5.0SMDJ400A,SMAJ22CA,SC3E5-350LM,TPSMBJ,SMCJ6.5CA,8.0SMDJ22CA,SMAJ75A,SMCJ36A,SA190CA,SCPB1005S121MPF,SM4KBF,5.0SMDJ75A,P4SMA9.1A,TH8S SERIES,SMF54CA,SC30-600,P4SMA91A,TPSMAJ,1.5KE100A,SC2E8-250MSMD,P6SMB170A,SMCJ45CA,3KP60A,30KPA84CA,SC3E5-470LM,P6KE75CA,TH8D28CA,P4KE24A,SCF030-1812R,SCPB3216S121WTF,SC16-600,SCA SERIES,SCGB1005S600FPF,SC3E5-150L,SMAJ6.5A,SMBJ440A,SMCJ58CA,SMDJ7.5CA,5.0SMDJ17CA,1.5KE18CA,5KP60CA,5.0SMDJ70CA,SMCJ33A,P4SMA350A,RCF260-1812R,SCGB3216S700KTF,SCF0805,P4KE22A,P4SMA6.8CA,10D SERIES,P4KE6.8A,SA6.5A,5.0SMDJ33CA,SA36CA,SMBJ,SMDJ20CA,SMF6.0A,P4SMA15CA,3KP6.0CA,SMDJ160A,3KP26CA,SCWL201610H-R47ML,SMAJ60A,SMAJ,SC2E8-75ML,5.0SMDJ70A,5.0SMDJ SERIES,SMF22CA,SMDJ48A,SMCJ7.0CA,SMCJ20A,P4KE36CA,SCF260-13-1812,P6KE200A,SMDJ,20KPA36CA,SC1206-470ASMD,SMBJ85A,1.5KE380A,P4KE120CA,P4SMA400CA,SCPB1608S600QPF,SC2K8-400SMD,SMF180A,SM8E43A,SMCJ,SM8S22CA,SMDJ33CA,SMDJ45A,1.5SMC8.2CA,SCC-401M,SMCJ13CA,SCB-201M,TH8S16CA,PXXXXSB SERIES,SMDJ64CA,3KP13CA,5KP180CA,SCWL252010G SERIES,1.5KE62A,20KPA26A,SCF020-0805R,20KPA104CA,PXXXXLA SERIES,SMCJ26CA,SA75A,TH8D,20KPA24A,TH8S,SMDJ43A,1.5SMC91CA,SCHB1608W601EPF,1.5SMC180CA,20KPA300CA,SCPB-S SERIES,1.5KE250A,SCF012-0603R,SA78A,53D361K,SMAJ85CA,P4SMA200A,SA190A,K1-076,1.5KE8.2A,2
ROHM（罗姆）IC/功率元器件/分立式元器件/无源元器件/光学元器件/模块选型指南（中文）
目录- ComfySIL™品牌介绍 IC 功率元器件 分立式元器件 无源元器件 光学元器件 模块 品名索引
型号- BD7673AG,SMLEN3BC8T,DTC014EM,ML7183 [J],BD3473KS2,KA2004-H05N20A,BM2LB300FJ-C,RCJ220N25,BU7295S,SML-S13UT,BU43XXG SERIES,DTC143TEB,KD3001-H0JN11,RSX101VYM30,BH25RB1WGUT,BD7602GUL,KD2004-G0FW00A,BD82001FVJ-LB,BD12IC0MEFJ-LB,BD60A00NUX,RB238NS150,RCX160N20,SML-D12Y8W,SMLA12BN8T,BR25H128,LA-301VL,RBE2VAM20A,LA-301VB,BD70GA5MEFJ-LB,SML-811UT (A),BM61M41RFV-C,SML-010VT,BD9C301FJ,BU1BTD2,DTA124XM,ECO 200,BD15GC0MEFJ-LB,BM2SC123FP2-LBZ,RS3L110AT,RB298T100,DTC143TCA,BD18HC0MEFJ-M,BD46EXX1G-M,RSS060P05,BD71L4LG-1,BR25H160,DTA124XE,BR25A512,BU27030NUC,BD30IC0W,RGPR20BM36HR,BD95821MUV,DTA123JKA,BD6995FV,BH76206HFV,KD2002-G0JB10A,SCT4036KW7HR,BD00GC0MEFJ-M,BD8158FVM,BR24HXXX-5AC系列,SML-S13VT,RD3P175SN,BU97941FV,HS8K11,BD53XXG-2M SERIES,RQ5L015SP,BH7673G,SML-Z14Y4T,BD52XXG-2C,BD47XXG SERIES,BD6046GUL,BU7291S,RGW60TS65HR,KDZLV SERIES,BUS1DJC0GWZ,BD18HC5MEFJ-M,SML-D12Y3W,BM2P0361K-Z,SML-P11YT (R),BM6241FS,BU30TD2,BM92A34MWV,BU30TD3,BD65D00MUV,DTA115EUB,SCM-013RT,1SS355VMTHTE-17,BD63521EFV,BU94702AKV,RBQ10BGE10A,SML-S13PT,RB168MM200,DTC144WCA,BD22621G-M,SLI-343URC,RS6R035BH,RGT20NL65,DTD123TC,RFVS8TG6S,BD6529GUL,DTA015TUB,BM521Q25F,R8003KNX,DTB113ZC,SML-Z14UT (A),BD60HA5MEFJ-LB,DTA023YEB,UCR006,DTA115EU3,BD95514MUV,RB531VM-30,DTB113ZK,BD9S200MUF-C,DTC014EUB,SMLZ24BN3T (C),DTD123TK,RD3S100AA,BD33HA5MEFJ-LB,RFN6T2D,IMX25,RFC02MM2S,SCS215AJ,BA4560R,BA4560Y,SCS215AG,R6000ENH,BR25A1M,BU29TD2,SML-S13RT,BD37210AMUV,BD4271HFP-C,BU29TD3,BU64253GWZ,UFZV SERIES,BR93HXX-2C系列,BU7294S,RV2L009GN,SML-010PT,BD52XXG-2M,RBR2LAM30A,BD30GA3MEFJ-LB,RBR5L30B,RBR5L30A,RSX501LAM20,RX3L07BGN,BU2506FV,RB228T150,ML610Q419C-NNNTBXXXX,RCX300N20,BH76363FV,BU91797MUF-M,ML610Q429,RQ1E075XN,TFZV,RD3L01BAT,BD8229EFV,BD25GA5MEFJ-LB,BD37034FV-M,BD8311NUV,BD63251MUV,ML610Q431,RF4G060AT,BU18SA4WGWL,ML610Q438,ML610Q436,RQ3E100AT,SMF5V0,ML610Q435,BD94121F,ML610Q432,BD3539FVM,BV1LC085EFJ-C,RQ3E100BN,ML610Q419,BU2394KN,SML-A12MT (J),BAXXBC0,KR2002-D06B71A,DTA123JUB,ML86V76580,RD3S100CN,DTC114YEB,RQ5E020SP,SCS215KG,BD63573NUV,DTA015TEB,BA90BC0,RTR020P02,DTA123JU3,RB058LAM-40,ML610Q421,SML813BNT,ML610Q422,BDXXIA系列,BH1730FVC,DAN222WM,BD68888MUV,DTB114GK,BM2P241W-Z,ML610Q407,PML100,BU34DV7NUX,ML610Q408,DTC143TKA,RGTV60TK65D,RSX201L-30,BD42530EFJ-C,SCS220AJ,LBP-602DK2,BD9104FVM,KD3002-G1FW00A,SCS220AG,BD50GC0MEFJ-LB,BD5469GUL,R6511ENX,SMLK18WBNCW,R6511ENJ,ML610Q412,DTA014YUB,RB058LAM-30,CSL0903DT,RX3L07BBG,ML610Q411,SCT4036KE,RUQ050N02,QS8J2,RF305BM6S,BD2812GU,SML-011VT (A),BH1603FVC,RS1E180BN,BD70FC0W,RF201L2S,BD7F100HFN-LB,BD48XXFVE,VS5V0BB1FS,SML012ENT,DTA124EEB,BD8317GWL,BM2P051F,BD60GC0MEFJ-LB,ML610Q400,BD3508MUV,RB238NS100,SML-S13YT,DTB114EC,BD00FC0W,ML7174 [J],SML-010YT,RV2E014AJ,SLI-343M8C,BM2P101EK-LBZ,BD63888AEKV,BD63888MUV,DTB114EK,RGW00TS65HR,SLI-343M8G,RQ5L020SN,BD81870MUF-M,DTC044TUB,BA25JC5T,RB228T100,RB168LAM-30,ML610Q411PA,RFUH25TB3S,BD30IC0MEFJ-LB,BD9B600MUV,BM2P052F,DTD123YC,BM2P159PF,SCT4036KR,SLR-322DU,BD87A29FVM,RF201L4S,DTC024XUB,RQ1A060ZP,SML-P11DT (R),DTA124ECA,DTB114GC,RB168LAM-40,RSS065N06,BM2P053F,DTD123YK,BD33GC0MEFJ-LB,BD9874CP-V5,SML-D13FW,BD49EXXG SERIES,SLR-322DC,2SC2412K,BM63563S-VC,RFNL20TJ6S,RF505BGE6S,BD25IC0W,BM63563S-VA,BDJ2FC0W,LBP-602MA2,ML9092-03,ML9092-02,BA3259HFP,ML9092-04,RH6L040BG,USB 500U,RF01VM2S,BD46EXX5G-M SERIES,RJ1L12BGN,RRR1VWM4STFTR,FMY1A,BM2P054F,BD7691FJ,BD82004FVJ-M,USB 500T,SML-811WT,SML-522MY8W,DAN222ZM,BM2P060MF-Z,BD15HA5MEFJ-LB,RFS60TZ6S,UMZ18NFM,BD48LXXG,DTC114YCA,RBR10BGE30A,RBR40NS60A,BH76809FVM,RRH100P03,SCT3105KL,DTC043ZEB,SCT3105KR,BD18HA5WEFJ,BD9060F-C,RB058LAM-60,RQ6E080AJ,RB168LAM-60,SLI-560DT,BD2051AFJ,BD61250MUV,BD94122F,R6035KNZ4,DTC144EU3,2SA1037AK,BD9470AFM,2SB1590K,RD3T075CN,BD35395FJ-M,RESD1CANY,SP8M41,DTC144EUB,BHXXRB1WGUT,UMH11N,BD2266G-M,DTC023EEB,SLI-570Y2T,BA82904Y,SML-012PT (A),BM6101FV-C,SML-A15YT,SML-S13DT,BD82020FVJ,RBS1LAM40A,BD7690FJ,DTA143XCA,BSM180C12P2E202,ML9092-01,RGTH60TS65D,BDXXIA5,RBQ10NS45A,R6009END3,R6035VNX3,BD99950MUV,RE1J002YN,SP8M31,RFN10T2D,UMH10N,RF101LAM2S,BD88210GUL,BD48EXXG SERIES,BA82903Y,BM61S41RFV-C,2SCR587D3,BD1HC500HFN-C,R6015ENZ,BU7205S,2SAR553P,BV1LC150EFJ-C,SML-011DT,RS3E095BN,ML86V8401,DTC014TM,BH26M0AWHFV,2SAR553R,BD63576NUX,RQ3E130BN,BA82902Y,BU2FSA4WGWL,BD81010MUV,KA2002-B35N00A,BD71L3SHFV,R6042JNZ4,BD15HC5WEFJ,BD90302NUF-C,SH8M24,SML-812MT,BU6652NUX,DTA143XEB,BD82032FVJ,BDXXIC0,BD52W03G-C,BD9862MUV,ML9098B,SP8M51,BD48W00G-C,RGS80TSX2DHR,BH15M0AWHFV,BU30JA2DG-C,SML-D12P8W,LMR982,LMR981,BD37522FS,R6015ENJ,RB088BM150,BA82901Y,RB088LAM100,KDZV,2SAR552P,ML610Q422P,BD26503GUL,R6015ENX,R8002KND3,BUXXSA5WGWZ,2SCR512P5,ML62Q1878,BH3544F,ML62Q1879,QS8K2,BU7465S,SCT3080AW7,RQ6E050AT,BD00IA5WEFJ,RFNL15TJ6S,SCT2450KE,BD30KA5FP,RQ6E050AJ,SML-D12□8□WT86□□□□,VS5V0BB1ES,BA33D15HFP,QS8J4,QS8J5,ML62Q1869,BD68710EFV,DTA043TUB,DTA114TEB,BH30M0AWHFV,RF1001T2D,RBR15BGE30A,LB-402VN,RSJ250P10,BV1LC105FJ-C,RFU02VSM8S,2SAR554P,BD30GC0WEFJ,BM1Z103FJ,BD60203EFV,BD9060HFP-C,BC848BW,UMZ1N,RS1L180GN,YDZV SERIES,BD82044FVJ,BR25G640,BD30HC0MEFJ-LB,2SAR554R,BD00HC5MEFJ-LB,RBR1L30A,RF301
如何测量MOS安全工作区？
电源模块测试通常包括以下内容：输入电压范围测试、输出电压测试、负载能力测试、温度测试、EMC测试、安全性测试等，本文鼎阳科技将给大家介绍如何使用示波器里面的电源分析选件测试MOS管的安全区。
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设计经验 发布时间 : 2024-06-11
EMC Chip Ferrite Bead – TLEA Series
型号- TLEA2012E181TF,TLEA1608D300TF,TLEA1608E601TF,TLEA0603D121TF,TLEA1005U421TF,TLEA1005D152TF,TLEA2012U100TF,TLEA1005E121TF,TLEA3216D601TF,TLEA2012D301TF,TLEA2012U601TF,TLEA2012D121TF,TLEA1005D600TF,TLEA1608U121TF,TLEA1005U601TF,TLEA1608D601TF,TLEA1005U221TF,TLEA1608D202TF,TLEA,TLEA1608D221TF,TLEA0603D241TF,TLEA1608U102TF,TLEA2012D102TF,TLEA 系列,TLEA1005U300TF,TLEA1005 TYPE,TLEA2012D501TF,TLEA3216 TYPE,TLEA3216D221T,TLEA1608U301TF,TLEA2012E102TF,TLEA1005U100TF,TLEA2012E601TF,TLEA2012U221TF,TLEA1005D601TF,TLEA1005D310TF,TLEA3216D122TF,TLEA2012U300TF,TLEA1005D121TF,TLEA1005D102TF,TLEA3216U601TF,TLEA2012D181TF,TLEA1608U600TF,TLEA1608D110TF,TLEA1608D152TF,TLEA2012U421TF,TLEA1005U301TF,TLEA0603D601TF,TLEA1608E121TF,TLEA SERIES,TLEA2012D800TF,TLEA2012D070TF,TLEA1005E601TF,TLEA2012U170TF,TLEA1005D221TF,TLEA2012U102TF,TLEA1608D182TF,TLEA1608U300TF,TLEA2012U121TF,TLEA1608D121TF,TLEA1608D751TF,TLEA2012U700TF,TLEA3216D102TF,TLEA1608D102TF,TLEA1608U100TF,TLEA2012D202TF,TLEA2012U301TF,TLEA0603 TYPE,TLEA2012D221TF,TLEA3216D121TF,TLEA2012 TYPE,TLEA2012D601TF,TLEA3216D310TF,TLEA3216D501TF,TLEA1005E800TF,TLEA2012D751TF,TLEA1608U471TF,TLEA1608U601TF,TLEA1608U221TF,TLEA3216D000TF,TLEA1005D421TF,TLEA1608 TYPE,TLEA1608D800TF,TLEA1608D301TF,TLEA0603D600TF,TLEA3216D800TF,TLEA1005D800TF,TLEA1608E181TF,TLEA1005E241TF,TLEA1005D301TF,TLEA3216D301TF,TLEA2012D421TF,TLEA1608D471TF,TLEA1005U102TF,TLEA2012D190TF,TLEA0603D800TF,TLEA2012D152TF,TLEA3216D600TF,TLEA1005U121TF,TLEA2012D300TF,TLEA1005D100TF,TLEA1005U700TF,TLEA1608D101TF,TLEA2012E501TF,TLEA1005D501TF,TLEA1608D600TF,TLEA2012E301TF,TLEA1608D222TF,TLEA1005D751TF,TLEA1608E102TF,TLEA2012E800TF
电子商城
品牌：硕凯电子
品类：Chip Ferrite Bead for High Current
价格：￥0.0375
现货： 56,057
现货市场
服务
提供是德(Keysight)，罗德(R&S)测试测量仪器租赁服务，包括网络分析仪、无线通讯综测仪、信号发生器、频谱分析仪、信号分析仪、电源等仪器租赁服务；租赁费用按月计算，租赁价格按仪器配置而定。
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朗能泛亚提供是德(Keysight)，罗德(R&S)等品牌的测试测量仪器维修服务，包括网络分析仪、无线通讯综测仪、信号发生器、频谱分析仪、信号分析仪、电源等仪器维修，支持一台仪器即可维修。
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