描述
MPC240
?旁路電容是一個經(jīng)常使用的實用方法，在五六十年代，這個詞也就有它特有的含義，現(xiàn)在不在多用了。電子管或者晶體管是需要偏置的，就是決定工作點的直流供電條件。中科節(jié)電工業(yè)節(jié)能。
例如電子管的柵極相對于陰極往往要求加有負(fù)壓，為了在一個直流電源下工作，就在陰極對地串接一個電阻，利用板流形成陰極的對地正電位，而柵極直流接地，這種偏置技術(shù)叫做“自偏”，但是對(交流)信號而言，這同時又是一個負(fù)反饋，為了消除這個影響，就在這個電阻上并聯(lián)一個足夠大的點容，這就叫旁路電容。后來也有的資料把它引申使用于類似情況。
去耦電容在集成電路電源和地之間的有兩個作用：一方面是本集成電路的蓄能電容，另一方面旁路掉該器件的高頻噪聲。數(shù)字電路中典型的去耦電容值是0.1μF。這個電容的分布電感的典型值是5μH。0.1μF的去耦電容有5μH的分布電感，它的并行共振頻率大約在7MHz左右，也就是說，對于10MHz以下的噪聲有較好的去耦效果，對40MHz以上的噪聲幾乎不起作用。1μF、10μF的電容，并行共振頻率在20MHz以上，去除高頻噪聲的效果要好一些。每10片左右集成電路要加一片充放電電容，或1個蓄能電容，可選10μF左右。最好不用電解電容，電解電容是兩層薄膜卷起來的，這種卷起來的結(jié)構(gòu)在高頻時表現(xiàn)為電感。要使用鉭電容或聚碳酸酯電容。去耦電容的選用并不嚴(yán)格，可按C=1/F，即10MHz取0.1μF，100MHz取0.01μF。
一般來說，容量為uf級的電容，像電解電容或鉭電容，他的電感較大，諧振頻率較小，對低頻信號通過較好，而對高頻信號，表現(xiàn)出較強(qiáng)的電感性，阻抗較大，同時，大電容還可以起到局部電荷池的作用，可以減少局部的干擾通過電源耦合出去;容量為0.001~0.1uf的電容，一般為陶瓷電容或云母電容，電感小，諧振頻率高，對高頻信號的阻抗較小，可以為高頻干擾信號提供一條旁路，減少外界對該局部的耦合干擾。
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Agilestar – 10G-XNPK-ZR – For Foundry Networks – NIB
Agilestar – ONS-SC-Z3-1470 – For Cisco – New In Box
Agilestar – ONS-SC-Z3-1490 – For Cisco – New In Box
Agilestar – ONS-SC-Z3-1510 – For Cisco – New In Box
Agilestar – ONS-SC-Z3-1530 – For Cisco – New In Box
Agilestar – ONS-SC-Z3-1550 – For Cisco – New In Box
Agilestar – ONS-SC-Z3-1570 – For Cisco – New In Box
Agilestar – ONS-SC-Z3-1590 – For Cisco – New In Box
Agilestar – ONS-SC-Z3-1610 – For Cisco – New In Box
Agilestar – SF2G-LX4-5C-47-?AS – For FibroLAN – New in B
Agilestar – SF2G-LX4-5C-49-?AS – For FibroLAN – New in B
Agilestar – SF2G-LX4-5C-51-?AS – For FibroLAN – New in B
Agilestar – SF2G-LX4-5C-53-?AS – For FibroLAN – New in B
Agilestar – SF2G-LX4-5C-55-?AS – For FibroLAN – New in B
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-A?S – For Foundry – New in Box
Agilestar – E1MG-BXU-60KM-A?S – 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-OC192?LR2 – 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-D?WDM
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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