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PCB设计中3W原则20H原则和五五原则都是什么

3W原则

在PCB设计中为了减少线间串扰,应保证线间距足够大,当线中心间距不少于3倍线宽时,则可保持大部分电场不互相干扰,这就是3W规则。3W原则是指多个高速信号线长距离走线的时候,其间距应该遵循3W原则,例如时钟线,差分线,视频、音频信号线,复位信号线及其他系统关键电路需要遵循3W原则,而并不是板上所有的布线都要强制符合3W原则。

 

满足3W

2021-11-08 01:30:02 下载 10 查看 4,762
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黑客基础之DOS 攻击(极品中极品) net use \ipipc$ " " /user:" " 建立IPC空链接 net use \ipipc$ "密码" /user:"用户名" 建立IPC非

黑客基础之DOS 攻击(极品中极品) net use \\ip\ipc$ " " /user:" " 建立IPC空链接 net use \\ip\ipc$ "密码" /user:"用户名" 建立IPC
2016-07-02 00:16:01 下载 95 查看 1,173
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msp430x2xxx family 单片机 user guide

msp430 单片机使用指导
2013-11-02 13:36:01 下载 165 查看 1,038
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WebMail is a server application that allows ISPs to provide a WWW interface for each user to his mai

WebMail is a server application that allows ISPs to provide a WWW interface for each user to his mailbox
2015-01-12 10:36:01 下载 48 查看 1,100
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This application, built in VB using MapObjects, allows the user to zoom in, zoom out and pan using

This application, built in VB using MapObjects, allows the user to zoom in, zoom out and pan using
2014-12-22 09:10:02 下载 61 查看 1,081
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mpeg 2 system 1,2,3 all user need to check it out

mpeg 2 system 1,2,3 all user need to check it out
2013-12-15 07:49:02 下载 89 查看 1,093
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ARm s3c44b0 develoment sch and user guider

ARm s3c44b0 develoment sch and user guider
2015-07-17 20:56:01 下载 118 查看 1,138
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LPC2210-user,when you study arm you should use it.

LPC2210-user,when you study arm you should use it.
2013-12-18 16:45:06 下载 113 查看 1,061
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a ppt for brew user interface. very useful .can give you much help

a ppt for brew user interface. very useful .can give you much help
2013-12-17 19:08:13 下载 112 查看 1,061
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The user may ask for all eigenvalue

The user may ask for all eigenvalues, all eigenvalues in the half-open interval (VL, VU], or the IL-th
2014-01-21 08:05:01 下载 70 查看 1,075
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KphoneSI (kpsi) is a SIP (Session Initiation Protocol) user agent for Linux, with which you can in

KphoneSI (kpsi) is a SIP (Session Initiation Protocol) user agent for Linux, with which you can initiate
2015-09-13 10:19:02 下载 141 查看 1,103
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ISCSI user client software.Client would be used to access the IPSAN server.

ISCSI user client software.Client would be used to access the IPSAN server.
2015-11-18 10:52:01 下载 131 查看 1,070
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how_to_auto_start_user_arm9 s3c2410

how_to_auto_start_user_arm9 s3c2410
2014-01-01 01:33:08 下载 51 查看 1,038
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Cygwin user guide, 从Cygwin 网站上整理出来的

Cygwin user guide, 从Cygwin 网站上整理出来的,学习Cygwin的可以
2015-12-30 20:26:01 下载 25 查看 1,050
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Winput offers an input window to get a user s input string for batch processing.

Winput offers an input window to get a user s input string for batch processing.
2013-12-25 14:18:05 下载 26 查看 1,038
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SmartRF_Studio_User_Manual RF开发TI的用户手册

SmartRF_Studio_User_Manual RF开发TI的用户手册
2016-02-16 10:10:02 下载 142 查看 1,047
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HCS12 Load RAM and Execute Bootloader User Guide SW.zip

HCS12 Load RAM and Execute Bootloader User Guide SW.zip
2016-05-17 10:11:01 下载 64 查看 1,050
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Class CatalogGUI lets the user display the product details of every product in the gourmet coffee st

Class CatalogGUI lets the user display the product details of every product in the gourmet coffee store
2016-07-03 00:43:01 下载 101 查看 1,102
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User modules and configuration for uclinux on s3c44b0 soc

User modules and configuration for uclinux on s3c44b0 soc
2014-12-01 12:26:02 下载 32 查看 1,055
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This Suite will provide modules for user & rig

This Suite will provide modules for user & right centralized management: user profile management, ldap
2014-07-25 14:59:02 下载 108 查看 1,061
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