一文详解LC滤波器各种类及其零部件的选择
LC滤波器，是指将电感(L)与电容器 (C)进行组合设计构成的滤波电路，可去除或通过特定频率的无源器件。
电容器具有隔直流通交流，且交流频率越高越容易通过的特性。而电感则具有隔交流通直流，且交流频率越高越不易通过的特性。
因此，电容器和电感是特性完全相反的被动元器件，通过将电容和电感组合，就可去除或通过特定频率的信号。
LC滤波器的种类
LC滤波器按所通过信号的频段分为以下三类：
1. 低通滤波器(LPF)
低通滤波器是一种用于传递直流或者低频信号，衰减高频信号的滤波器。作为被最广泛使用的滤波器电路，主要用于剔除高频噪声。此外，音响中用于剔除低音用扬声器的高音/中音成分。
2. 高通滤波器(HPF)
高通滤波器是允许高于某一截频的频率通过，而大大衰减较低频率的一种滤波器。这种滤波器被用于剔除听阈的低频噪声，或剔除高音用扬声器的中音/低音成分等。
3.带通滤波器(BPF)
带通滤波器是用来只允许特定频率的信号通过，屏蔽其他频率信号的滤波器电路。这种滤波器被用于收音机的选台(调整频率)、或剔除中音用扬声器的低音/高音成分等。
低通滤波器的种类
电容器和电感，虽然各自单独具有噪声去除效果，但是通过将2个零部件进行组合，就可获得更大的噪声去除效果。串联连接的电感以隔断高频噪声，用并联连接的电容器来使高频噪声旁通的方式发挥作用。但是，噪声去除效果也会随输入侧和输出侧各自的外部阻抗的高低而改变。譬如，即使试图用低阻抗的电容器来使噪声旁通，如果输出阻抗更低，则噪声会流向负荷侧。相反，即使试图以高阻抗的电感来隔断噪声，如果输出阻抗更高，则噪声会流向负荷侧。因此，外部阻抗高时，将电容器配置在附近；外部阻抗低时，将电感配置在附近。如上所述，考虑外部阻抗，低通滤波器可区分为以下4类。
1. L型滤波器(1)
输入阻抗⇒ 高
输出阻抗⇒ 低
2. L型滤波器(2)
输入阻抗⇒ 低输出阻抗⇒ 高
3. π型滤波器
输入阻抗⇒ 高输出阻抗⇒ 高
4. T型滤波器
输入阻抗⇒ 低输出阻抗⇒ 低
相比L型滤波器，π型和T型滤波器的噪声去除效果更好，因而还要考虑这方面的因素来选定电路
低通滤波器的零部件选择
要在信号电路上从信号波形去除噪声时，必须选定在信号频率下不会衰减而在噪声频率下衰减会增大的零部件常数。要在电源电路上从直流电压去除噪声时，由于直流的衰减为零，因而只考虑噪声频率的衰减量。
滤波器的衰减特性(频率引起的衰减量的变化)可通过计算来求得，但实际的电容器和电感除了纯粹的静电电容和电感外还包含有影响性能的成分，因而无法单纯地计算
在L型滤波器上标示出基于电容器和电感的实际等效电路的电路图。电容器上除了静电电容(C)外还包含有等效串联电阻(ESR)和等效串联电感(ESL)，电感上除了电感(L)外还包含有直流电阻(DCR)和杂散电容(Cp)。
电容器若只是C成分，频率越高阻抗低，噪声吸收效果越好，但在实际的电容器上则根据ESR来决定阻抗的下限值，并且阻抗在高频域会随ESL而升高，变得不易吸收噪声。此外，电感若只是L成分，频率越高阻抗高，噪声隔断效果越好，但实际上阻抗会随电感器中所包含的Cp而在高频域下降，噪声的隔断效果下降。再者，各自的成分也会随频率而发生值的变化，因而将这些因素全都考虑进来选定零部件就变得相当难。
因此，LC滤波器上经常会使用模拟工具来选定零部件。通常，模拟工具上可使用按零部件的型号别提供的S参数或SPICE模型，来计算每个频率的正确的衰减量。
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SERIES,BCMA2012-181N,DMMA7078-100M,MDA1870-220M,FBA0805-471-701R,NRSA4030-4R7M,MDA7055HT-220M,MDA1870-680M,FBA0805-221-751R,MDA7055HT-680M,MDA1050-3R3M,MDTA20161A-R47M,MDTA20161A-2R2M,FBHA1206-800-302R,BCMA2012,MDA1360-8R2M,NRSA8040-2R2M,NRSA8040-1R5M,MDA1054HT-330M,MDA5030-4R7M,MDA1054HT-100M,FBA0402,MDTA20161A-1R5M,BCMA3216,BCMA1009-151Y,DMMA7078-220M,ACMV SERIES,FBHA0603-331-152R,FBHA1206-501-302R,NRSA6028-150M,BCMA3225-601N,MDA1870-1R5M,BCMA7060-501Y,FBA0402-600-301R,NRSA4018B-2R2M,MDTA25201B-R47M,MDA1040-150M,FBHA0402-800-232R,FBHA0402-600-252R,ACMV4532,BCMA9250-501N,NRSA6020-4R7M,FBHA0402-121-202R,NRSA201610-180M,BCMA4532,NRSA3015B-1R5M,NRSA3015B-2R2M,NRSA SERIES,FBA0603-471-351R,NRSA5040-1R5M,NRSA5040-2R2M,FBA0805-070-601R,NRSA4030-5R6M,FBHA0805-300-302R,MDTA SERIES,MDA1054HT-1R5M,FBHA1206-300-302R,NRSA6045-470M,MDA5030-5R6M,BCMA9070-272Y,MDA1054HT-2R2M,BCMA9250-501Y,FBHA0805-101-102R,BCMA3216-601N,NRSA3015B-R47N,FBA0603-102-201R,DMMA1094-150M,FBA0402-601-800R,FBA0805-400-601R,FBA1206-151-901R,FBA1206-301-701R,MDA1870-2R2M,FBA0805-121-801R,FBA1206-500-501R,BCMA9070-152Y,MDTA20161A-R68M,BCMA7060,FBHA1206-121-302R,FBA1206-700-501R,BCMA3216-222N,MDTA20161A-1R0M,FBHA0805-331-252R,MDA7050-3R3M,FBA0603-600-701R,NRSA6028-4R7M,NRSA6045-121M,MDA1054HT-4R7M,NRSA6045-1R0M,MDA7030-470M,NRSA5040-150M,MDTA25201B-R33M,BCMA2012-161N,BCMA7060-272Y,DMMA1094-220M,FBHA1206-601-202R,NRSA4018B-1R0M,NRSA6020-3R3M,ACMA4532-510Y,MDA7055HT-470M,ACMA,MDA1040-470M,MDTA25201B-1R0M,NRSA8040-3R3M,DMMA 1094,NRSA4030-180M,BCMA1211-701Y,FBA0603-202-201R,BCMA3216-102N,NRSA6028,MDTA25201B-R22M,MDTA25201B-R10M,MDTA20161A,DMMA1094-100M,FBA0805-202-251R,MDA7030-R68M,MDA7030-R56M,NRSA2520B-4R7M,BCMA1009-090Y,ACMV4532-101Y-FD,MDTA25201B-100M,MDA1360-4R7M,FBA0402-102-500R,NRSA6045-1R2M,NRSA6045-220M,NRSA6045-680M,MDA7030-1R0M,BCMA9250-5250N,MDTA20161A-R10M,ACMV,FBHA0603-102-102R,DMMA7078-150M,FBHA S SERIES,MDTA32251B-R68M,NRSA201610-6R8M,MDA4020-5R6M,BCMA7060-141Y,BCMA1009-500Y,NRSA4018B-220M,FBHA1206-500-302R,NRSA6045,FBA0603-601-351R,BCMA1211-172Y,NRSA3015B-4R7M,NRSA6045-2R0M,NRSA6045-100M,NRSA6045-330M,NRSA6045-560M,NRSA6045-221M,MDA1050,MDA SERIES,NRSA6045-1R3M,MDTA20161A-R33M,MDTA25201B-R68M,MDA1870-3R3M,MDTA32251B-1R0M,FBA0603-252-201R,FBA0603-220-501R,FBHA1206-601-302R,MDA1040-330M,NRSA5020,NRSA6045-R47M,NRSA4030-6R8M,FBA0603-221-251R,NRSA5040-470M,MDA1040-100M,MDTA32251B-R22M,BCMA7060-701Y,BCMA,MDA,MDA7050-1R5M,MDA5030-6R8M,MDA1050-1R0M,FBHA0805-102-152R,MDA7030-R22M,FBHA0805-220-602R,NRSA4030-8R2M,MDA7050-2R2M,SPM,MDA1040,MDA7030-1R2M,MDA1040-R22M,MDA7030-220M,NRSA201610-150M,NRSA6045-101M,NRSA3012B,MDA1054HT,MDA1040-680M,NRSA6020-1R5M,NRSA6020-2R2M,MDA1040-220M,BCMA9250-S510N,MDTA32251B-R33M,BCMA9250-5100N,ACMA4532,BCMA7060-700Y,MDA1365-5R6M,FBA0805,FBHA1206-121-202R,MDA7030-R33M,MDA5030-R82M,MDA7030-330M,FBA0402-152-201R,NRSA6045-1R5M,NRSA6045-2R2M,ACMV4532-101Y,MDA4020-8R2M,MDA1050-R68M,FBA0603-152-201R,MDA4020-6R8M,MDA7030-100M,NRSA4014B-1R0N,NRSA5040,MDA1050-470M,MDA7030-R36M,BCMA3225-900N,BCMA9250-S400N,MDA7055HT-150M,MDTA32251B-1R5M,MDA7050-330M,BCMA1211-272Y,NRSA4014B,NRSA2520B-180M,MDA7050-100M,MDA1040-R56M,NRSA6045-3R0M,MDA1040-R68M,NRSA6045-2R3M,MDTA32251B-2R2M,FBHA1206-151-202R,BCMA5020-501N,FBA1206-201-601R,MDA5030-150M,MDA7030-R47M,MDA1040-1R0M,MDA7050-220M,BCMA9250,MDA1365-4R7M,BCMA2012-900N,MDA7030-2R2M,ACMA3225-101Y,NRSA8040-4R7M,NRSA4030-150M,MDTA32251B-R47M,BCMA2012-261N,MDA7030-1R5M,MDA7030-6R8M,FBA SERI
COMPONENTS FOR AUTOMOTIVE PRODUCT CATALOG
型号- NRSA5040-220M,NRSA5040-680M,MDA1365-2R2M,MDTA25201B,MDA1365-1R5M,ACMV3225-101Y,MDTA25201B-3R3M,ACMV3225,NRSA6020-5R6M,FBA0402-471-101R,FBA0805-151-801R,MDA1360,FBHA0603-151-202R,BCMA9250-203Y,MDA1050-R47M,NRSA6045-R82M,MDA1360-150M,MDA1365,NRSA3015B,NRSA5040-330M,BCMA1009,MDA HT,MDA1870-470M,FBA0603-301-501R,BCMA9070,MDA1050-1R5M,MDA7050-1R0M,FBA0805-152-351R,FBHA0402-100-252R,MDA7054HT-4R7M,MDTA20161A-R15M,NRSA8040,NRSA6028-6R8M,FBHA0402-221-152R,MDA1050-2R2M,FBA0603,MDA1350,MDTA20161A-3R3M,BCMA9250-652Y,BCMA1009-050Y,MDA1050-R36M,MDA1040-8R2M,MDA HT SERIES,NRSA2520B-6R8M,WIV SERIES,MDA1040-6R8M,NRSA5040-101M,FBA0805-260-601R,FBHA0805-102-102R,NRSA5040-1R0M,MDA1365-100M,MDTA32251B-3R3M,NRSA4018B-3R3M,FBHA0805-471-102R,BCMA1211,BCMA9250-400N,MDA1050-220M,NRSA6045-150M,NRSA4018B,MDA1365-R47M,NRSA3015B-3R3M,FBA0402-300-301R,MDA2313,FBA0402-301-500R,MDA1870-1R0M,NRSA5040-100M,MDA1365-680M,FBA1206-221-701R,MDA7030-R15M,FBA1206-121-901R,ACMA3225,FBA0805-601-501R,ACMV4532-510Y,NRSA5020-2R2M,MDA7050-470M,MDA7054HT-5R6M,BCMA9250-510N,MDA1050-100M,MDA1050-330M,MDA1054HT-3R3M,NRSA5020-1R5N,NRSA2520B-150M,BCMA1211-501Y,BCMA4532-601N,MDA1870-R56M,BCMA9070-701Y,FBA0402-121-800R,DMMA7078-1R0M,FBA0402-151-101R,NRSA201610-4R7M,FBHA1206-330-602R,MDA7030-3R3M,NRSA4018B-100M,MDA1870-100M,MDA1870-330M,MDA1365-3R3M,MDTA25201B-2R2M,MDTA20161A-R24M,MDTA25201B-1R5M,ACMA3225-510Y,MDA1350-3R3M,FBA0402-221-500R,BCMA1009-392Y,MDA1870-R47M,BCMA3225,BCMA SERIES,BCMA2012-181N,DMMA7078-100M,MDA1870-220M,FBA0805-471-701R,NRSA4030-4R7M,MDA1870-680M,FBA0805-221-751R,MDA2313-6R8M,MDA1050-3R3M,MDTA20161A-R47M,MDTA20161A-2R2M,FBHA1206-800-302R,BCMA2012,MDA1360-8R2M,MDA1054HT-330M,MDA5030-4R7M,MDA1054HT-100M,FBA0402,MDTA20161A-1R5M,BCMA3216,FBHA0603-101-302R,BCMA1009-151Y,DMMA7078-220M,ACMV SERIES,FBHA0603-331-152R,FBHA1206-501-302R,BCMA3225-601N,MDA1870-1R5M,FBHA0805-221-302R,BCMA7060-501Y,FBA0402-600-301R,NRSA4018B-2R2M,MDTA25201B-R47M,MDA1040-150M,FBHA0402-800-232R,FBHA0402-600-252R,ACMV4532,NRSA5020-2R7M,NRSA6020-4R7M,FBHA0402-121-202R,NRSA201610-180M,BCMA4532,NRSA3015B-1R5M,MDA2313-150M,NRSA3015B-2R2M,NRSA SERIES,FBA0603-471-351R,NRSA5040-1R5M,NRSA5040-2R2M,FBA0805-070-601R,NRSA4030-5R6M,MDTA SERIES,MDA1054HT-1R5M,FBHA1206-300-302R,NRSA6045-470M,MDA5030-5R6M,BCMA9070-272Y,NRSA5020-3R3M,MDA1054HT-2R2M,MDA1350-2R2M,BCMA9250-501Y,DMMA7078,FBHA0805-101-102R,BCMA3216-601N,FBA0603-102-201R,NRSA3015B-R47M,DMMA1094-150M,FBA0402-601-800R,FBA0805-400-601R,FBA1206-151-901R,FBA1206-301-701R,MDA1870-2R2M,FBA0805-121-801R,FBA1206-500-501R,BCMA9070-152Y,MDTA20161A-R68M,BCMA7060,FBHA1206-121-302R,MDA7054HT-6R8M,FBA1206-700-501R,BCMA3216-222N,MDA2313-101M,MDTA20161A-1R0M,FBHA0805-331-252R,MDA7050-3R3M,MDA7054HT-8R2M,FBA0603-600-701R,NRSA6028-4R7M,NRSA6045-121M,MDA1054HT-4R7M,NRSA6045-1R0M,NRSA5020-120M,MDA7030-470M,FBHA0805-151-202R,NRSA5040-150M,MDTA25201B-R33M,BCMA2012-161N,BCMA7060-272Y,DMMA1094-220M,FBHA1206-601-202R,NRSA6020,NRSA4018B-1R0M,NRSA6020-3R3M,MDA2313-330M,ACMA4532-510Y,ACMA,MDA2313-100M,MDA1040-470M,MDTA25201B-1R0M,NRSA4030-180M,BCMA1211-701Y,FBA0603-202-201R,BCMA3216-102N,NRSA5020-470M,NRSA6028,MDTA25201B-R22M,MDTA25201B-R10M,MDTA20161A,DMMA1094-100M,FBA0805-202-251R,MDA7030-R68M,MDA7030-R56M,NRSA2520B-4R7M,BCMA1009-090Y,ACMV4532-101Y-FD,MDTA25201B-100M,MDA1360-4R7M,FBA0402-102-500R,NRSA6045-1R2M,NRSA6045-220M,NRSA6045-680M,MDA7030-1R0M,MDTA20161A-R10M,ACMV,FBHA0603-102-102R,DMMA7078-150M,FBHA S SERIES,MDTA32251B-R68M,NRSA201610-6R8M,MDA4020-5R6M,BCMA7060-141Y,BCMA1009-500Y,NRSA4018B-220M,FBHA1206-500-302R,MDA2313-2R2M,FBHA0805-221-202R,NRSA6045,FBHA1206,FBA0603-601-351R,BCMA1211-172Y,MDA2313-1R5M,NRSA3015B-4R7M,NRSA6045-2R0M,NRSA6045-100M,NRSA6045-330M,NRSA6045-560M,NRSA6045-221M,MDA1050,MDA SERIES,FBHA0805-301-102R,NRSA6045-1R3M,MDA7054HT-150M,MDTA20161A-R33M,MDTA25201B-R68M,MDA1870-3R3M,MDTA32251B-1R0M,FBA0603-252-201R,FBA0603-220-501R,FBHA1206-601-302R,MDA1040-330M,NRSA6045-R47M,NRSA4030-6R8M,FBA0603-221-251R,NRSA5040-470M,MDA1040-100M,MDTA32251B-R22M,BCMA7060-701Y,MDA2313-1R0M,BCMA,MDA,MDA7050-1R5M,MDA5030-6R8M,MDA1050-1R0M,FBHA0805-102-152R,MDA7030-R22M,FBHA0805-220-602R,NRSA4030-8R2M,MDA7050-2R2M,MDA1040,MDA7030-1R2M,MDA1040-R22M,MDA7030-220M,NRSA201610-150M,NRSA6045-101M,NRSA3012B,MDA1054HT,MDA1040-680M,NRSA6020-1R5M,NRSA6020-2R2M,MDA1040-220M,BCMA9250-S510N,MDTA32251B-R33M,ACMA4532,BCMA7060-700Y,NRSA5020-330M,MDA1365-5R6M,FBA0805,FBHA1206-121-202R,NRSA5020-100M,MDA7030-R33M,MDA5030-R82M,MDA7030-330M,FBA0402-152-201R,NRSA6045-1R5M,MDA1350-4R7M,NRSA6045-2R2M,ACMV4532-101Y,MDA2313-470M,MDA4020-8R2M,MDA1050-R68M,FBA0603-152-201R,MDA4020-6R8M,MDA7030-100M,NRSA4014B-1R0N,NRSA5040,MDA1050-470M,MDA7030-R36M,BCMA3225-900N,MDA2313-680M,BCMA9250-S400N,MDTA32251B-1R5M,MDA7050-330M,BCMA1211-272Y,MDA2313-220M,NRSA4014B,NRSA5020-1R2N,NRSA5020-220M,NRSA2520B-180M,MDA7050-100M,MDA1040-R56M,NRSA6045-3R0M,MDA1040-R68M,NRSA6045-2R3M,MDTA32251B-2R2M,FBHA1206-151-202R,BCMA5020-501N,FBA1206-201-601R,MDA5030-150M,MDA7030-R47M,MDA1040-1R0M,MDA7054HT-470M,M
BCMA Series Common Mode Filters For Automotive Power Line Size 7060
型号- BCMA7060-102Y,BCMA7060-132Y,BCMA7060-501Y,BCMA7060-302Y,BCMA7060-301Y,BCMA7060-701Y,BCMA7060-700Y,BCMA7060,BCMA,BCMA SERIES,BCMA7060-141Y,BCMA7060-272Y
从原理到实践，掌握EMC——科或电子EMC磁珠系列产品，适用于车身控制和车载多媒体等信号线滤波器
EMC（电磁兼容）是指一种设备或系统在其电磁环境中能够正常工作，并且不会对该环境中的任何设备产生无法接受的电磁干扰的能力。KOHER科或电子提供EMC磁珠系列产品，采用两种不同特性的材料，针对从一般信号到高速信号的各种频率特性的对策，具备AEC-Q200认证，工作温度-55至+150℃。
产品 发布时间 : 2024-04-10
SCM Series SMD Common Mode Inductor
型号- SCM6536-181Y,SCM6536-470Y,SCM6536-101Y,SCM6536-100Y,SCM SERIES,SCM6536-221Y,SCM6536-331Y,SCM,SCM6536-510Y,SCM6536-820Y,SCM6536
BCMA Series Common Mode Filters For Automotive Signal Line/Power Line Size 5020
型号- BCMA5020-102N,BCMA5020-101N,BCMA5020-142N,BCMA5020-251N,BCMA5020-152N,BCMA,BCMA5020-501N,BCMA SERIES
BCMA Series Common Mode Filters For Automotive Signal Line/Power Line
型号- BCMA5020-102N,BCMA5020-101N,BCMA5020-142N,BCMA5020-251N,BCMA5020-152N,BCMA,BCMA SERIES,BCMA5020-501N,BCMA5020
BCMA Series Common Moda Filters For Automotive Signal Line Size 1210
型号- BCMA1210-900N,BCMA,BCMA1210,BCMA SERIES
ACMA Series Common Mode Filters For Automotive Signal Line Size 4532
型号- ACMA4532ETH,ACMA,ACMA SERIES,ACMA4532ETH-201M
ACMA ETH Series Common Mode Filters For Automotive Signal Line
型号- ACMA ETH SERIES,ACMA ETH,ACMA3225ETH-201Y
电子商城
现货市场
服务
可定制射频隔离器/环行器（10M-40GHz），双工器/三工器（30MHz/850MHz-20GHz），滤波器（DC-20GHz），功分器，同轴负载，同轴衰减器等射频器件；可定制频率覆盖DC~110GHz，功率最高20KW。
最小起订量： 1 提交需求>
可来图定制均温板VC尺寸50*50mm~600*600 mm，厚度1mm~10mm，最薄0.3mm。当量导热系数可达10000W/M·K，散热量可达10KW, 功率密度可达50W/cm²。项目单次采购额需满足1万元以上，或年需求5万元以上。
提交需求>
授权代理品牌：集成电路
授权代理品牌：分立元件
授权代理品牌：接插件及结构件
授权代理品牌：部件、组件及配件
授权代理品牌：电源及模块
授权代理品牌：电子材料
授权代理品牌：仪器仪表及测试配组件
授权代理品牌：电工工具及材料
授权代理品牌：机械电子元件
授权代理品牌：加工与定制
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