滤波器(filter),是一种用来消除干扰杂讯的器件,将输入或输出经过过滤而得到纯净的直流电。对特定频率的频点或该频点以外的频率进行有效滤除的电路,就是滤波器,其功能就是得到一个特定频率或消除一个特定频率。
滤波器,顾名思义,是对波进行过滤的器件。“波”是一个非常广泛的物理概念,在电子技术领域,“波”被狭义地局限于特指描述各种物理量的取值随时间起伏变化的过程。该过程通过各类传感器的作用,被转换为电压或电流的时间函数,称之为各种物理量的时间波形,或者称之为信号。因为自变量时间‘是连续取值的,所以称之为连续时间信号,又习惯地称之为模拟信号(Analog
Signal)。随着数字式电子计算机(一般简称计算机)技术的产生和飞速发展,为了便于计算机对信号进行处理,产生了在抽样定理指导下将连续时间信号变换成离散时间信号的完整的理论和方法。也就是说,可以只用原模拟信号在一系列离散时间坐标点上的样本值表达原始信号而不丢失任何信息,波、波形、信号这些概念既然表达的是客观世界中各种物理量的变化,自然就是现代社会赖以生存的各种信息的载体。信息需要传播,靠的就是波形信号的传递。信号在它的产生、转换、传输的每一个环节都可能由于环境和干扰的存在而畸变,有时,甚至是在相当多的情况下,这种畸变还很严重,以致于信号及其所携带的信息被深深地埋在噪声当中了。
滤波,本质上是从被噪声畸变和污染了的信号中提取原始信号所携带的信息的过程。
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| 22M63 |
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| V53C16528LT50 |
| M5M51016TP-10VLL |
| M5M51016TP |
| 24LC02B/SN |
| MX7628KCWP |
| TC6326AF |
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| UPD72001GC-11 |
| D72001GC-11 |
| UPD65013-C16 |
| D65013-C16 |
| UPD703003GC-25 |
| D703003GC-25 |
| L7A1645 |
| M31010M6-104HP |
| L7A1434 |
| L7A1434J |
| M37774M5L434GP |
| IR2125 |
| UPD75236GJ-037 |
| D75236GJ-037 |
| MN188166AB |
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| S-470AP |
| TMP84C40N-3P83 |
| AEIC88514477 |
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| 2SC4632LS |
| C4632 |
| PIC16C505-04/SL |
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| UA709CA |
| MC1458P |
| MAX222CWE |
| TC74HC564AP |
| 74HC564AP |
| TD62084AP |
| UPD78058GK526 |
| AN6754S |
| UPD75304BGF |
| UPD75304BGF-063 |
| TMP47C222FG |
| TA7343AP |
| SN74LS541N |
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| CMX673P1 |
| 74LVX157 |
| LVX157 |
| SN74LV244ANS |
| AN3834S |
| SAA7372GP |
| 0270012SMA2ARY |
| 1A2121SMA-2A |
| 1A2121/85261 |
| BA5970FP |
| 027053ST2A0RY |
| 1A353/85323 |
| 1A353ST-2A |
| UPD75P308GP |
| PC817 |
| MN89647 |
| HD74LS194AP |
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| BP5068-15 |
| MAX232EWE |
| K2301D-212 |
| TMP87PM41U |
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| UPD78366GF |
| KM424C257Z-10 |
| HM534253A-10 |
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| HD6475328F10 |
| PIC16LC712-04/SO |
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| 100.0000C |
| AN6726 |
| DM74ALS74AM |
| MAX202CWE |
| MB74LS86 |
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| HEF4093BP |
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| ACT04 |
| EM84502AP |
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| UPD71P301GQ |
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| PQ05R02 |
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| LSC4368P2 |
| D51C05D |
| MAX232ACWE |
| TMP87P808M |
| M95110 |
| TC74HC4538BP |
| 74HC4538BP |
| TC74ACT245 |
| 74ACT245 |
| SN74HCT32A |
| 74HCT32A |
| 74ALS240ASJ |
| MG4001-2M015 |
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| LMX1602 |
| W91312 |
| W91350A |
| TAEA1112A |
| AM2149-45PC |
| SG-615HPC |
| 66.6667M |
| 1355 |
| 5097 |
| 1355-5097 |
| AEIC50940261 |
| S-513AP3 |
| AEIC50940262 |
| S-514AQ3 |
| UPD78012FCW-078 |
| D78012FCW-078 |
| S-150 |
| D7507BCU-215 |
| FA8408GX-33 |
| EX128-FTQG100 |
| EX128F |
| AEICC4277233 |
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| HC165 |
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| UPD65840-Y08 |
| 65840-Y08 |
| TL072CP |
| TL393CP |
| CMX637P1 |
| IBM01121G5J3F |
| 01121G5J3F |
| HD64F7044F28 |
| AM27C020-200JC |
| OH98XQQAZ0018 |
| M93H006 |
| CD90-7277-11P |
| 74HC00 |
| HC00 |
| 28F800B5-8 |
| HY67V161610DTC-7 |
| MT48LC2M32B2TG-6 |
| 48LC2M32B2TG-6 |
| DAN801 |
| TC4023BP |
| CP2216-D2 |
| NS0013 |
| TMP87C408LM-1396 |
| TC90A69F |
| TC74HC138A |
| 89712D |
| 89712D-504 |
| AM2088AT |
| 74HCT02D |
| TD62003F |
| S13015-KS |
| LY9566 |
| CXD1176Q |
| D1176Q |
| ES56028S |
| 63KFFFK |
| A1792 |
| LT1477 |
| 1477 |
| 24C16J |
| CSI24C16J |
| PIC16C63A-20/S0 |
| LMV824M |
| 476AG |
| PMY723 |
| 74VHC00 |
| HD74HC164P |
| SN74F543NT |
| 74F164APC |
| HD74HC86P |
| TC74HC574AP |
| 74HC574AP |
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| TC74HC85AP |
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| HD7410P |
| 74F109PC |
| MC74F74N |
| TC74HC373AP |
| 74HC373AP |
| HD7432P |
| HD74HC365P |
| MC145406P |
| 34063 |
| SN74F280BN |
| SN7407N |
| TC74HC123P |
| TD62801P |
| 74HC151AP |
| TC74HC246P |
| 74ACT574PC |
| TC74HC194AP |
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| TC4069BP |
| TA75393AP |
| SN75115N |
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| TC74HCT7007P |
| SN74LS92N |
| SN72HC273N |
| 74F151APC |
| 74F157APC |
| HD74HC245P |
| 74F27PC |
| 74HC75AP |
| NJM4558D |
| 4558D |
| NJM2072D |
| 2072D |
| NJM3414AD |
| 3414AD |
| 74HC697AP |
| TC74HC697AP |
| TD62083AP |
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| 74F540PC |
| 74S74N |
| TC4012BP |
| 74HC244AP |
| NJM062D |
| 062D |
| SN74LS07N |
| SN7406N |
| HD74LS74AP |
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| HD74HC123AP |
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| TC4051BP |
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| TC4011BP |
| CD4011BE |
| 74F04PC |
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| 74F74PC |
| 74HC4022AP |
| SN74HC00N |
| TC4001BP |
| SN74LS90N |
| SW022012-901008 |
| TMP80C39AP-6 |
| KS56C450-50 |
| UA741CP |
| YMZ284-D |
| TC5565APL-12 |
| 24C04AI/P |
| TMP82C55AP-10 |
| 74HC193AP |
| DM74161AN |
| TLP523 |
| EX038F |
| SN75116N |
| TC54256AP |
| STV9380A |
| TIBPAL20R6-7CNY |
| MC3302N |
| 7910CF |
| MCM6664AP15 |
| DAC0808LCN |
| TL082CP |
| 76634IPAJ |
| HM6264ALP-12 |
| SF510194B |
| TC57256AD-20 |
| 766 |
| SN74161N |
| TMP8085AP-12 |
| 74AC574PC |
| 29M73 |
| 74F164PC |
| G6AK-274P |
| LF355N |
| 74HCU04AP |
| EZ430 |
| 1500A |
| LA6324 |
| NE564N |
| PAL16V8H-15PC/4 |
| PAL16V8H-25PC/4 |
| GAL16V8B-15LP |
| AT24C02SI27 |
| LM229N |
| RC4558 |
| BD3814FV |
| ISP1106 |
| CD2609 |
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| AN17140A |
| MN101C616AA1 |
| LA6502 |
| CXA2064M |
| LC75342 |
| M51X17400F-10 |
| PCM2704 |
| AK5355VT |
| 5355VT |
| LC75345 |
| BH7868FS |
| SN74LV00A |
| 74LV00A |
| SN74AHCT08 |
| AHCT08 |
| SN74LVC08A |
| LVC08A |
| SN74HC08 |
| HC08 |
| SN74HCU04A |
| HCU04A |
| SN74HCT32 |
| HCT32 |
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| MM1233 |
| BD7910 |
| BH6565F |
| R45801 |
| SN74LV08A |
| LV08A |
| HB08 |
| LC75725 |
| L04 |
| L08 |
| L02 |
| L66 |
| L16 |
| M62444FP |
| BA5983FM |
| AN4801SB |
| MM1565A |
| 565A |
| MM1563D |
| 563D |
| MM1563B |
| 563B |
| MM1563G |
| 563G |
| MM1593D |
| 593D |
| M1701B |
| 701B |
| MM1701C |
| 701C |
| N926 |
| SAA5264PC/N3/0/04 |
| SAA5264V1.6-205 |
| SAA5563PS/M3/1417 |
| MN171602BN2 |
| CD4094BCN |
| TDA7439 |
| BU9253AS |
| LV1100 |
| LC72136N |
| CD4094BE |
| TA1317AN |
| BU2090 |
| BU2092 |
| LC72723 |
| SN74HCU04N |
| MIP2C4 |
| NJM14558D |
| 14558D |
| NJM12904D |
| 12904D |
| NJM4565D |
| 4565D |
| BA15218 |
| STA506A |
| R2S15904SP |
| BA6897FP |
| BA6664FM |
| MM1495 |
| MX29LV800TMC-70 |
| M61519FP |
| AN88806SB |
| HT46C47-Q00M |
| W24257-14 |
| LA6541 |
| CS493292-CL |
| EN29F002ANT-70JC |
| PALCE610H-25JC |
| NP7543JP |
| 74HCT00A |
| LVX88 |
| BA15218N |
| BU4094BCF |
| LA1833 |
| AK4384ET |
| 4384ET |
| 4387ET |
| AK5357ET |
| 5357ET |
| AK5358ET |
| 5358ET |
| AK4385ET |
| 4385ET |
| AK4384VT |
| 4384VT |
| AK4519VF |
| 4519VF |
| 74F373D |
| MN101C61GFJ1 |
| MN101C49KKL1 |
| IX1731GEN2 |
| A2523AR |
| M38039HF-091FP |
| M38B79MFH-A059FP |
| CXD2662R |
| MN101C28DMP |
| XC68HC705RC16DW |
| 060CFKC512/CN |
| TDA8051T |
| 060BFKC005/12 |
| PF0045A-04-TB |
| PF0045A |
| 9385521 |
| 9371253 |
| TDA7313D |
| LT111825 |
| 111825 |
| UPD85654S1011 |
| D85654S1011 |
| HDL3C204-11E |
| M3024 |
| BCM5465RA1KFB |
| M48T08-150PCI |
| DS1216 |
| MPC740APX266LH |
| M36DR432A |
| SN74S200JD |
| G5V-1 |
| GAV20V8C7LJ |
| KM29W040AT |
| S16128BU-55LUT |
| UREA2-006A |
| PQ30RV21 |
| NM24C03LEM8 |
| LM244D |
| AT89C5124PI |
| DS87C520 |
| TC58A040F |
| AN5560 |
| UC-2706 |
| UGZZ2-402A |
| RSST7503M |
| R6753-11 |
| UC-2151 |
| UC-1791 |
| UC2561 |
| UC2282 |
| UPD753012-702 |
| D753012-702 |
| UPD753012-709 |
| D753012-709 |
| UPD753016-708 |
| D753016-708 |
| LR3715M |
| EK-302T0816AX |
| T0816AX |
| WEK-302R0906A2 |
| R0906A2 |
| M30V3419 |
| MC13110FB |
| 01MCRSS020A |
| OTI0021268 |
| 100022-511 |
| TTS01M |
| 12.800MHZ |
| T0861A1 |
| L78M20CV |
| M7716 |
| TC74HC4094A |
| TC74VHCT74A |
| VHCT74A |
| VHCU04 |
| HD74ACT139 |
| ACT139 |
| AN3293S-E2V |
| D16551B11AQC |
| TM6047D0005A-P2NBP3 |
| R6785-21 |
| SAA2500 |
| SCC66470CAB |
| PIC16LC74A-04I/PQ |
| STI3500CV-ES |
| GSC38TG307CF31 |
| MC68340FE16 |
| SB82442FX |
| SB82441FX |
| LC8953 |
| LC8954 |
| VP40506B2 |
| WD60C40-LU |
| GXC02SH307DH49 |
| XC96002RC33OD12C |
| XC96002RC33 |
| XCD251FU |
| CL450 |
| CL9110-P208-LX10 |
| CL9100-P160-MV |
| GSC02UH307MZ57 |
| GSC38PG307CF50 |
| KL5C80B12CFP |
| CL-MD4214-22SC-A |
| L64002MC-27M2AVD |
| L64000MC-27M2VD |
| L64000MC-27MPEG2VD |
| ISG2B422FP-08 |
| P8773-91-MX00 |
| TE6350C |
| R6711-31 |
| M12L6416AL1LG |
| RL01410 |
| LC7861NE |
| LC92060A-772 |
| XA414JB1 |
| HD6417095F23 |
| PBLP300A |
| CXA1082BQ |
| MN1871620W2T2 |
| AN3663FBP-TV |
| TMP87CM71FG-6683 |
| 87CM71FG-6683 |
| TC58FVM6BATG65 |
| TMP87CS71F-6649 |
| 87CS71F-6649 |
| M38B79MFH-A140FP |
| M38B79MFH-A196FP |
| M38B79MFH-A100FP |
| M38173M6-218FP |
| THC63DV164 |
| DSP56004FJ66 |
| CXA3268AR |
| UPD4564323G5-A10B |
| LC89512 |
| W981616BH-7 |
| IC61LV6416-10T |
| MN102L62GAA |
| MN102L2503 |
| TMP93CS41F |
| AK2342V |
| ZIVA-D6-LP83 |
| ZIVAD6-L |
| M30220MA-119RP |
| YGV628-V |
| TDA7420 |
| RFB1526 |
| YM6612F |
| YGV606B-F |
| YSS216B-FZ |
| YMZ735-F |
| MC68160FB |
| DP83840VCE |
| BA7703KI |
| MB90553BPF-G-244 |
| MB90553BPF-242 |
| ATT78148GF-041 |
| P06P03LV |
| P2103HVG |
| N3856V |
| ADM232AARN-REEL |
| P07D03LV |
| P07D03LVG |
| TMCSOP28 |
| SOP28 SAMPLE |
| N2101VG |
| N2101V |
| N1164 |
| P2103HV |
| 2M5A |
| HD6433927A75F |
| BH7517K1 |
| GT-48002A-P-4 |
| CL-GD620-32QC-B |
| ES4318F |
| M38023M4L252FP |
| NJU6468FGT-00 |
| NJU6468FG |
| GS1545CQR |
| ES6318F |
| L-FW323-06 |
| FW326-06 |
| TMS320C32PCM50 |
| SN751508FT |
| XC68SC302PU20 |
| MT46V2M32-5C |
| 46V2M32-5C |
| SC405553FN |
| SC405551FN |
| S1830AF-010 |
| VY22187B |
| 6713-009 |
| SED1278FOC |
| 88SA8040B1-TBC1C000 |
| VL82C320PSF-C3 |
| NMP4370092 |
| PM4007A |
| PD4606A |
| SIL504CM208 |
| MT46V2M32LG-6 |
| 46V2M32LG-6 |
| BA9705K-VP |
| M88C7500M-LAE1 |
| 88C7500M-LAE1 |
| ACTM(AIELEC) |
| SIL503CP208 |
| SIL164CT64 |
| STL7023B |
| AD9887AKS-170 |
| ADV7300AKST |
| ADSSTMEL-100 |
| HT82V733 |
| MX23C3210MC-12 |
| GMS973200 |
| MX27C4000MC-12 |
| MX27C8100MC-12 |
| NT68F632 |
| MB3773PF-G-BND-TF |
| M93C46-TNM6T |
| CD74AC04M96 |
| CD74AC20M96 |
| HD74HC123AFPEL |
| MC12202DR2 |
| RT9245CS |
| 74VHC245MSCX |
| 74VHC08MX |
| 74VHC244MSCX |
| DM7438MX |
| 74F163ASJX |
| MM1414HVBE |
| MC68HC705L16FU |
| SC501058DW |
| TL497ACNSR |
| MM1373EFBE |
| 373E |
| 74LVT245DB |
| S-8232AGFT-T2 |
| ADV7173KST-REEL |
| NJU7054V(E1) |
| AS211D |
| SAA6579T |
| RT9165CX |
| RT9169-14CX |
| RT9248CS |
| 74AHC244PW |
| 74AHCT14D |
| 74HCT126PW |
| UPD65929GD-012-MNL |
| UPD790035GK-A01-9EU |
| UPD703033AYGC-J02-8EU |
| VE-61153-F1-JN1 |
| UPD178078GF-645-3BA |
| UPD78095GC(A)-315-8EU |
| LH28F800BVEC38 |
| MBM29F040-70 |
| MBM29F040C-70PFT |
| E28F008SA120 |
| MSM51V18160B-60TS |
| SST39LF800A55-4C |
| 39LF800A55-4C |
| OSCAR-E5-D4 |
| 40121300 |
| Q53101-1S2 |
| SL11R100REV1.22 |
| AT2021 |
| DM9008F |
| AH22D-00 |
| CYBER05050 |
| GS7071-174 |
| AH20W-00 |
| CT8005A11AQC |
| CBK0010AA |
| HG75C013ABT |
| AD1835AS |
| ADSST-21061LKS-176 |
| ADSP2106L-KS160 |
| AD9884AKS-100 |
| AD1835AAS |
| RFB1437 |
| RFB3087 |
| 1AB11023AAAA |
| 1AB02732AAAA |
| LC89517K |
| LC8766B2A-5T47 |
| LC8904Q |
| LC78625E |
| LC75883E |
| CXA2465AR |
| LC75850W |
| UPD78024GF-052-3B4 |
| UPD78076GF-081-3BA |
| TM9926FW |
| TM8822FW |
| TM8205FW |
| TM8205AFW |
| LC7821-E |
| TM9926FS |
| BQ2060 |
| TM9435FS |
| TM9435BFS |
| 74F193SJ |
| M30620FCPGP |
| 74HCT139D |
| MB3761PF-G-BND-TR |
| HT23C020H001S |
| SN74HC74NS |
| NJM3716M |
| NJU4052BV |
| NJM2573V(TE1) |
| NJU7311AM |
| NJUM240M |
| SAA7121H |
| MB40168 |
| CD4051BCMX |
| MMDF4N01HDR2 |
| CD74HCT245M96 |
| KS8808ADTF |
| XL-93LC66ARYE2 |
| MC68HC705P9CDW |
| BT864AKRF |
| MB6615PBT-6 |
| G07007SB |
| NG80386SX-20 |
| K4D263238E-GC33 |
| L7250E1.2 |
| HT95A10P |
| TDA7401 |
| UE1434226DW |
| SF5101941B |
| MC144110P |
| MC14013BCP |
| MC10124L |
| MC10131L |
| MC14053B |
| TMP47P451VN |
| TC9152P |
| TC9020P-003 |
| AN7560Z-WLB |
| W24257AJ-15 |
| SC501054DW |
| SC417948DW |
| MAX241CW1 |
| ER4521 |
| LRS1857 |
| LRS1806 |
| 6408W30B |
| ADV7304AKST |
| LRS1825 |
| BR24C10A |
| 215RUA33 |
| AK93C65AV-L |
| HD6473308RF6 |
| HD6477034VF12 |
| HD63084FP |
| A6D-4103 |
| DS26LS32CN |
| TDA8205 |
半导体三极管又称“晶体三极管”或“晶体管”。在半导体锗或硅的单晶上制备两个能相互影响的PN结,组成一个PNP(或NPN)结构。中间的N区(或P区)叫基区,两边的区域叫发射区和集电区,这三部分各有一条电极引线,分别叫基极B、发射极E和集电极C,是能起放大、振荡或开关等作用的半导体电子器件 VCU2133A QL12X16-0PL84C QL8X12A-2P68C M27C512PC-12 PFB2085P LM2901N NE592N TIBPAL22V10-15BCNT TLV5590E SN75188N SN75189N SN76489AN TMS27C240-10JL TMS4C1050-60NL UC3842N ...
磁珠专用于抑制信号线、电源线上的高频噪声和尖峰干扰,还具有吸收静电脉冲的能力。磁珠是用来吸收超高频信号,象一些RF电路,PLL,振荡电路,含超高频存储器电路(DDRSDRAM,RAMBUS等)都需要在电源输入部分加磁珠,而电感是一种蓄能元件,用在LC振荡电路,中低频的滤波电路等,其应用频率范围很少超过50MHZ。 磁珠有很高的电阻率和磁导率,等效于电阻和电感串联,但电阻值和电感值都随频率变化 铁氧体材料的特点是高频损耗非常大,具有很高的导磁率,使电感的线圈绕组之间在高频高阻的情况下产生的电容最校当磁珠中有电流穿过时,铁氧体对低频电流几乎没有什么阻抗,而对较高频率的电流会产生较大的衰减。对于抑制电磁干扰用的铁氧体,最重要的性能参数为磁导率μ和饱和磁通密度Bs。它的等效电路为一个电感和一个电阻串联,两个元件的值都与磁珠的长度成比例。当导线穿过这种铁氧体磁芯时,所构成的电感阻抗是随着频率的升高而增加。高频电流在其中以热量形式散发。 在低频段,阻抗由电感的感抗构成。低频时R很小,磁芯的磁导率较高,因此电感量较大,L起主要作用,电磁干扰被反射而受到抑制,并且这时磁芯的损耗较小....