【摘要】 通过对高速信号布线中经常出现的阻抗匹配问题的研究,结合一个VGA(视频图形阵列)分配器的设计实例,分析了阻抗匹配问题出现的原因和两种常用解决方案的端接方法,然后通过分析VGA分配器的电路特点,采用源端串联匹配的端接方式,利用传输阻抗计算软件SI6000计算传输线的特性阻抗,从而选择相应的阻值与其进行匹配,最后使用Hyperlynx仿真软件进行BOARDSIM仿真,仿真结果显示此种方案可以很好地改善视频信号传输过程中的阻抗匹配问题。更多还原

【Abstract】 The paper studies the Impendence Matching problem in high speed signal PCB design in association with a VGA driver and analyzes the cause of Impendence Matching problem and the characteristics of two methods which are used to solve the problem.After studying the features of the circuit,the first method is adopted.By choosing the resistance calculated by SI6000 the matching is realized.With this method we can achieve the improvement with a simulation software called Hyperlynx.更多还原