描述
MPC240
旁路电容是一个经常使用的实用方法,在五六十年代,这个词也就有它特有的含义,现在不在多用了。电子管或者晶体管是需要偏置的,就是决定工作点的直流供电条件。中科节电工业节能。
例如电子管的栅极相对于阴极往往要求加有负压,为了在一个直流电源下工作,就在阴极对地串接一个电阻,利用板流形成阴极的对地正电位,而栅极直流接地,这种偏置技术叫做“自偏”,但是对(交流)信号而言,这同时又是一个负反馈,为了消除这个影响,就在这个电阻上并联一个足够大的点容,这就叫旁路电容。后来也有的资料把它引申使用于类似情况。
去耦电容在集成电路电源和地之间的有两个作用:一方面是本集成电路的蓄能电容,另一方面旁路掉该器件的高频噪声。数字电路中典型的去耦电容值是0.1μF。这个电容的分布电感的典型值是5μH。0.1μF的去耦电容有5μH的分布电感,它的并行共振频率大约在7MHz左右,也就是说,对于10MHz以下的噪声有较好的去耦效果,对40MHz以上的噪声几乎不起作用。1μF、10μF的电容,并行共振频率在20MHz以上,去除高频噪声的效果要好一些。每10片左右集成电路要加一片充放电电容,或1个蓄能电容,可选10μF左右。最好不用电解电容,电解电容是两层薄膜卷起来的,这种卷起来的结构在高频时表现为电感。要使用钽电容或聚碳酸酯电容。去耦电容的选用并不严格,可按C=1/F,即10MHz取0.1μF,100MHz取0.01μF。
一般来说,容量为uf级的电容,像电解电容或钽电容,他的电感较大,谐振频率较小,对低频信号通过较好,而对高频信号,表现出较强的电感性,阻抗较大,同时,大电容还可以起到局部电荷池的作用,可以减少局部的干扰通过电源耦合出去;容量为0.001~0.1uf的电容,一般为陶瓷电容或云母电容,电感小,谐振频率高,对高频信号的阻抗较小,可以为高频干扰信号提供一条旁路,减少外界对该局部的耦合干扰。
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Agilestar – SF2G-LX4-5C-57-AS – For FibroLAN – New in B
Agilestar – SF2G-LX4-5C-59-AS – For FibroLAN – New in B
Agilestar – SF2G-LX4-5C-61-AS – For FibroLAN – New in B
Agilestar – 3HE00047AA – For Alcatel-Lucent – NIB
Agilestar – FTRX-1811-3 – For Finisar – New In Box
Agilestar – ONS-SE-2G-1470 – For Cisco – New In Box
Agilestar – ONS-SE-2G-1490 – For Cisco – New In Box
Agilestar – ONS-SE-2G-1510 – For Cisco – New In Box
Agilestar – ONS-SE-2G-1530 – For Cisco – New In Box
Agilestar – ONS-SE-2G-1550 – For Cisco – New In Box
Agilestar – ONS-SE-2G-1570 – For Cisco – New In Box
Agilestar – ONS-SE-2G-1590 – For Cisco – New In Box
Agilestar – ONS-SE-2G-1610 – For Cisco – New In Box
Agilestar – DWDM-XENPAK-36.61 -For Cisco – New in Box
Agilestar – DWDM-X2-30.33 – For Cisco -10GBASE-DWDM
Agilestar – DWDM-X2-31.12 – For Cisco -10GBASE-DWDM
Agilestar – DWDM-X2-31.90 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-32.68 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-34.25 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-35.04 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-35.82 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-36.61 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-38.19 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-38.98 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-39.77 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-40.56 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-42.14 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-42.94 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-43.73 – For Cisco -10GBASE-DWDM
Agilestar – DWDM-X2-44.53 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-46.12 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-46.92 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-47.72 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-48.51- For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-50.12 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-50.92 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-51.72 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-52.52 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-54.13 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-54.94 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-55.75 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-56.55 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-58.17 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-58.98 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-59.79 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-60.61 – For Cisco – 10GBASE-DWDM
Agilestar – DWDM-XENPAK-30.33 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-31.12 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-31.90 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-32.68 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-34.25 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-35.04 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-35.82 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-38.19 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-38.98 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-39.77 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-40.56 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-42.14 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-42.94 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-43.73 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-44.53 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-46.12 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-46.92 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-47.72 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-48.51 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-50.12 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-50.92 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-51.72 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-52.52 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-54.13 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-54.94 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-55.75 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-56.55 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-58.17 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-58.98 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-59.79 – For Cisco – New in Box
Agilestar – DWDM-XENPAK-60.61 – For Cisco – New in Box
Agilestar – 10GBASE-ZR-XFP – Enterasys Networks – NIB
Agilestar – EX-XFP-10GE-ZR – Juniper – New in Box
Agilestar – E1MG-BXD-60KM-AS – For Foundry – New in Box
Agilestar – E1MG-BXU-60KM-AS – For Foundry – New in Box
Agilestar – XENPAK-1XGE-ZR – Juniper – New in Box
Agilestar – SU69CD-AS – For Marconi – XFP 10GBASE-ZR SM
Agilestar – PAN-XFP-ZR – For Palo Alto – New in Box
Agilestar – XFP-10GZR-OC192LR2 – For Cisco – NIB
Agilestar – FTLX1811M3 – For Finisar – New In Box
Agilestar – XFP-10G-ZR80 – For Alcatel-Lucent – NIB
Agilestar – X2-10GB-ZR – For Cisco – New in Box
Agilestar – DWDM-XFP-30.33 – For Cisco – New in Box
Agilestar – DWDM-XFP-32.68 – For Cisco – New in Box
Agilestar – DWDM-XFP-35.04 – For Cisco – New in Box
Agilestar – DWDM-XFP-36.61 – For Cisco – New in Box
Agilestar – DWDM-XFP-38.19 – For Cisco – New in Box
Agilestar – DWDM-XFP-40.56 – For Cisco – New in Box
Agilestar – DWDM-XFP-42.14 – For Cisco – New in Box
Agilestar – DWDM-XFP-43.73 – For Cisco – New in Box
Agilestar – DWDM-XFP-46.12 – For Cisco – New in Box
Agilestar – DWDM-XFP-47.72 – For Cisco – New in Box
Agilestar – DWDM-XFP-50.92 – For Cisco – New in Box
Agilestar – DWDM-XFP-50.12 – For Cisco – New in Box
Agilestar – DWDM-XFP-48.51 -For Cisco – New in Box
Agilestar – DWDM-XFP-46.92 – For Cisco – New in Box
Agilestar – DWDM-XFP-44.53 – For Cisco – New in Box
Agilestar – DWDM-XFP-42.94 – For Cisco – New in Box
Agilestar – DWDM-XFP-39.77 – For Cisco – New in Box
Agilestar – DWDM-XFP-38.98 – For Cisco – New in Box
Agilestar – DWDM-XFP-35.82 -For Cisco – New in Box
Agilestar – DWDM-XFP-34.25 – For Cisco – New in Box
Agilestar – DWDM-XFP-31.90- For Cisco – New in Box
Agilestar – DWDM-XFP-31.12 – For Cisco – New in Box
Agilestar – XFP-10G-Z-OC192-LR2 – Juniper – New in Box
Agilestar – DWDM-XFP-51.72 – For Cisco – New in Box
Agilestar – DWDM-XFP-52.52 – For Cisco – New in Box
Agilestar – DWDM-XFP-54.13 – For Cisco – New in Box
Agilestar – DWDM-XFP-54.94 – For Cisco – New in Box
Agilestar – DWDM-XFP-55.75 – For Cisco – New in Box
Agilestar – DWDM-XFP-56.55 – For Cisco – New in Box
Agilestar – DWDM-XFP-58.98 – For Cisco – New in Box
Agilestar – XENPAK-10GB-ZR – For Cisco – New in Box
Agilestar – XFP-10G-Z-OC192-LR2 – ForJuniper Networks
Agilestar – DWDM-XFP-31.12-AS – For Cisco – New in Box
Agilestar – DWDM-XFP-31.90-AS – For Cisco – New in Box
Agilestar – DWDM-XFP-34.25-AS – For Cisco – New in Box
Agilestar – DWDM-XFP-35.82-AS – For Cisco – New in Box
Agilestar – DWDM-XFP-38.98-AS – For Cisco – New in Box
Agilestar – DWDM-XFP-39.77-AS – For Cisco – New in Box
Agilestar – DWDM-XFP-42.94-AS – For Cisco – New in Box
Agilestar – DWDM-XFP-48.51-AS – For Cisco – New in Box
Agilestar – DWDM-XFP-50.12-AS – For Cisco – New in Box
Agilestar – DWDM-XFP-60.61- For Cisco – New in Box
Agilestar – DWDM-XFP-59.79 – For Cisco – New in Box
Agilestar – DWDM-XFP-58.17 – For Cisco – New in Box
Agilestar – DWDM-XFP-56.55 40km- For Cisco – New in Box
Agilestar – DWDM-XFP-50.92 40km- For Cisco – New in Box
Agilestar – DWDM-XFP-38.19 40km- For Cisco – New in Box
Agilestar – DWDM-XFP-35.04 40km- For Cisco – New in Box
Agilestar – DWDM-XFP-32.68 40km- For Cisco – New in Box
Agilestar – 3HE00046AA – For Alcatel-Lucent – NIB
Agilestar – MGBIC-LC07 – For Enterasys Networks – NIB
Agilestar – DWDM-X2-55.75 40km – Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-54.94 40km – Cisco – 10GBASE-DWDM
Agilestar – DWDM-X2-30.33 40km- For Cisco- 10GBASE-DWDM
Agilestar – DWDM-X2-31.12 40km – For Cisco-10GBASE-DWDM
Agilestar – DWDM-X2-31.90 40km- For Cisco -10GBASE-DWDM
Agilestar – DWDM-X2-32.68 40km- For Cisco -10GBASE-DWDM
Agilestar – DWDM-X2-34.25 40km- For Cisco -10GBASE-DWDM
Agilestar – DWDM-X2-35.04 40km- For Cisco -10GBASE-DWDM
Agilestar – DWDM-X2-35.82 40km- For Cisco -10GBASE-DWDM
Agilestar – DWDM-X2-38.19 40km- For Cisco -10GBASE-DWDM
Agilestar – DWDM-X2-36.61 40km- For Cisco -10GBASE-DWDM
Agilestar – DWDM-X2-38.98 40km- For Cisco -10GBASE-DWDM
Agilestar – DWDM-X2-39.77 40km- For Cisco -10GBASE-DWDM
Agilestar – DWDM-X2-40.56 40km- For Cisco -10GBASE-DWDM
Agilestar – DWDM-X2-42.14 40km- For Cisco -10GBASE-DWDM
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