D-SUB接口的EMI问题分析及对策  

EMI Problem and Its Solution for Laptop's D-SUB Port

作　　者：唐文倩 

机构地区：[1]英顺达科技有限公司

出　　处：《安全与电磁兼容》2010年第4期63-64,89,共3页Safety & EMC

摘　　要：介绍某款笔记本电脑由于D-SUB接口信号处理不当造成的系统辐射超标问题,并分别使用改善接口接地和信号滤波的方法对辐射进行抑制。结果表明:加滤波元件的方法可使产品符合GB9254-2008B级ITE的限值要求。最后,综合信号传输性能选择了最符合要求的整改方案。The electromagnetic inference （EMI） problem of laptop＇s D-SUB port is mainly discussed,including analyzing and debugging.Two methods are utilized to suppress EMI emission,which are improving the interface grounding and adding signal filters in D-SUB.The latter method could help the product to be compliant with the limits of GB 9254 Class-B.Finally,the best solution for better signal integration and minimum radiation is put forward.

关 键 词：D-SUB接口 笔记本 辐射骚扰 

分 类 号：TP307[自动化与计算机技术—计算机系统结构]