该分开,但是需要注意返回路径的连续。(5)制作PCB时,重要信号线(高速信号)要求厂家进行阻抗控制,以保证传输线的阻抗连续。 РР 5 结语 Р 本文简单介绍了有关信號完整性(SI)的基础理论知识,包括“传输线”及其特征阻抗的概念,以及信号传输过程中,信号反射的产生。同时,结合笔者亲身经历的项目实例,总结了我们在电路设计中应当遵守的SI设计原则,并且为解决某些SI问题,提供了建议和参考。 Р 参考文献 Р [1] Eric Bogatin著.信号完整性分析[M].李玉山,等译.北京:电子工业出版社,2005,4. Р [2] 张娜,秦萌.信号完整性分析及仿真[J].计算机与网络,2012,38(13):38-41. Р Abstract:This paper briefly introduces the problem of signal integrity which we often encounter when designing embedded board, and then introduces the theoretical knowledge related to signal integrity. Finally, it is concluded that in the design of embedded board, in order to effectively avoid the emergence of signal integrity problems, we should follow the design points. РР Key words:signal integrity; signal reflection; characteristic impedance; impedance matching 84760593
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