摘要
现代高速电路设计中的信号完整性问题,尤其是过度的反射现象,常常造成严重的电路问题。研究了反射形成的机理,即阻抗突变引发信号反射,通过分析给出了减少反射的措施。由Altium Designer的信号完整性分析工具对设想进行了验证,仿真结果表明:适当的端接能大幅度改善传输线中信号的反射。
Signal integrity, especially, excessive reflection on modern high speed circuit design often cause serious circuit malfunction. The mechanism in forming reflection was studied ; that is, the change in the instantaneous impedance caused signal reflection. The analysis worked out some measures on reducing reflection, The assumption was validated by signal integrity tool of Altium Designer. Simulation results indicate that proper termination can greatly improve signal reflection in transmission lines.
出处
《现代电子技术》
2007年第21期179-181,184,共4页
Modern Electronics Technique
基金
湖南省教育厅科研项目(05C717)
关键词
信号完整性
阻抗突变
反射
端接
signal integrity
change in the instantaneous impedance
reflection
termination
