【作者】 刘波；

【导师】 史小卫；

【作者基本信息】 西安电子科技大学 ， 环境工程， 2011， 硕士

【摘要】 现代电子系统工作频率已经达到吉赫兹以上,相应脉冲信号的上升/下降沿更加陡峭,脉宽可达皮秒量级。集成度的不断提高使版图中互连线的密度空前增大。这样就带来了很多信号完整性和电源完整性的问题。本文对影响信号完整性和电源完整性的主要噪声进行介绍,包括反射,串扰和同步开关噪声。对反射的解决办法总结了几种端接方法,并且分析了各种不同端接方法的优点和缺点。对于串扰,介绍了基本概念和特点,对减小串扰的影响,也采取了几种方法。本文着重围绕同步开关噪声进行了分析,采取措施进行了抑制。从阻抗角度去减小同步开关噪声对电路的影响。另外,考虑到电源/地平面对和平行板电容器相似,提出了压缩电路厚度和改变介电常数来尝试降低同步开关噪声,得到了较好的效果。理想差分对在接地平面上的回流电流大小相等,方向相反等于没有电流流过,所以不会产生同步开关噪声,但在高频时不能这样考虑。本文建立了差分对电路模型,先进行差分线回流引起电源/地之间谐振进行了时域分析。随后用混合S参数,分析了差分对和电源/地之间的相互影响。对差分对的布线提供一定的指导意义。更多还原

【Abstract】 Frequency of modern electronic system design has reached GHz and above. The corresponding rising / falling edge go to ps magnitude. The continuous improvement of integration increases the density of interconnects. All of these bring a lot of signal integrity and power integrity issues.This paper introduces the main noise such as reflection, crosstalk and simultaneous switching noise of signal integrity and power integrity. Several termination methods have been listed that are solutions to the reflection, and show different strengths and weaknesses of those methods. The same chapter presents the basic concepts and characteristics of the crosstalk reduction. The article also mentions several ways how to reduce the effect.The focus is analysis of simultaneous switching noise and the measures to suppress it. From impedance angle, adding capacitance decreases the simultaneous switching noise on the circuit. Power / ground plane pair similar to capacitors. It also made changes in the thickness and dielectric constant to try to reduce the simultaneous switching noise, which gets better results.The return current of ideal differential lines is equal and opposite, so no current flows and no simultaneous switching noise. However, this can not be considered at high frequencies. This paper establishes a differential line circuit model. Time-domain analysis of power/ground resonance was executed, which was caused by return current of differential pair. After that, using mixed-mode S-parameters analyzes the interaction between the differential lines and the power plane structure. These conclusions have some guidance for wiring.更多还原