高速PCB设计中信号反射的抑制方法  

Suppression Method of Signal Reflection in High-speed PCB Layout

作　　者：王文涛[1] 赵娜[1] 郑宜忠[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2014年第8期67-69,73,共4页Radio Engineering

摘　　要：在印制电路板(PCB)设计中,高频率、高密度电路板设计所占比例越来越大,信号反射干扰现象越来越多。因此,如何消除PCB设计中存在的反射问题显得非常重要。针对此种情况,分析了在高速PCB设计过程中引起信号反射的主要原因,并基于EDA设计软件进行SI仿真辅助设计实例。介绍了PCB设计过程中设计布线的基本技巧和抑制反射的有效方法。通过仿真分析和实测波形表明,该方法可大大提高电路板的一次设计成功率。The high-frequency and high-density PCB layout increases significantly in recent years in PCB layout,and it is very outstanding in the reflection of signal,so how to remove the reflection is especially important.Aiming at this situation,the key reasons of signal refelction in high-speed PCB layout are analyzed.Based on EDA design software,SI simulation aided design is done.The basic wiring skill and the effective suppression method of signal reflection are designed in high speed PCB Layout.The simulation analysis and measured wave shape show that the process can improve the first success rate in the design of PCB layout.

关 键 词：反射 传输线 过冲 下冲 振荡 

分 类 号：TN911.73[电子电信—通信与信息系统]