BLVDS总线信号扩展技术的研究  

Research on Signal Integrity of BLVDS

作　　者：来晓 郑艺扬 LAI Xiao;ZHENG Yi-yang(Zhejiang SUPCON Co.,Ltd.,Hangzhou 310053,China;Zhejiang Expressway Information Engineering and Technology Co.,Ltd.,Hangzhou 310000,China)

机构地区：[1]浙江中控技术股份有限公司,杭州310053 [2]浙江高速信息工程技术有限公司,杭州310000

出　　处：《自动化与仪表》2020年第6期105-108,共4页Automation & Instrumentation

摘　　要：BLVDS总线支持双向、多节点通信,十分适合应用于插卡式的机架高速背板通信。然而,多节点、多变负载的情况对BLVDS总线的信号完整性提出很高的要求,同时也限制了总线内节点的数量。为此,该文从理论上对BLVDS总线协议、信号特性等方面进行分析,总结出几种总线的扩展方案,以实现节点数量的无限延伸。据此参数设计了几种BLVDS硬件扩展平台,对各种方案进行实际测量与验证。结果表明,几种方案均可以满足稳定通信的要求,但是各有优缺点。BLVDS which supports bi-directional and multi-node communication,is very suitable for high-speed backplane communication.However,a high demand is required on the conditions of multi-node,multi-load cases of BLVDS,and it limits the number of nodes in the BLVDS bus at the same time.Therefore,this paper analyzes the influence factors of signal characteristics integrity of BLVDS bus in theory,and summarizes several bus expansion schemes which could make the number of nodes extened infinitely.Several BLVDS hardware test platforms are designed according to these parameters,we measured and tested such test platforms.The result shows that each test platform can meet the requirements of stable communication,even if each has its own advantages and disadvantages.

关 键 词：BLVDS总线 多变负载 节点数 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]