差分对内偏斜对25 Gbps背板信号完整性的影响分析  

Effect of intra-pair skew between differential pair on signal integrity in 25Gbps backplane

作　　者：胡军[1] 李晋文[1] 曹跃胜[1] 杨安毅 张伟[1] 

机构地区：[1]国防科学技术大学计算机学院,湖南长沙410073

出　　处：《计算机工程与科学》2014年第12期2280-2285,共6页Computer Engineering & Science

基　　金：国家863计划资助项目(2012AA01A301)

摘　　要：数字系统设计和信号完整性工程师面对25Gbps信号传输挑战时,必须重视差分对内偏斜这个关键问题。先介绍差分对内偏斜产生的原因,然后从时域、频域分析了差分对内偏斜对25Gbps背板信号完整性的影响,通过基于测试的通道仿真估算25Gbps信号传输的差分对内偏斜容限;最后,提出了减少差分对内偏斜的工程处理方法。Faced with the challenge of 25 Gbps signal transmission, digital system design and signal integrity engineers must pay attention to the critical issue of intra-pair skew between differential pairs. Firstly,the cause of intra-pair skew between differential pairs is introduced. Secondly, effects of intra pair skew between differential pairs on signal integrity in 25 Gbps backplane are analyzed from frequency domain and time domain. At the same time,the margin of intra-pair skew between differential pairs for 25 Gbps signal transmission is evaluated by test-based channel simulation. Finally, the engineering trea- ting methods are provided to reduce intra-pair skew between differential pairs.

关 键 词：差分对内偏斜 信号完整性 通道仿真 偏斜容限 

分 类 号：TP302[自动化与计算机技术—计算机系统结构]