以共振腔法分析印刷電路板層級的同步切換雜訊問題

Abstract

電路系統操作時，由電源端所見的等效負載值會隨時間變動， 使其輸出電流值產生變化，生成暫態電流。藉由power delivery network傳出會造成Power/Ground Plane 直流（DC）電壓準位的浮動，此種現象稱之為Ground Bounce。在數位系統中，當並行（parallel）的資料匯流排同時切換（switching）其電壓準位時，造成的Ground Bounce可稱為Simultaneous Switching Noise (SSN)。 本文中，我們分析簡單且具實際性的矩形基板，透過合適的Green’s function，以2維full-mode的方式分析切換電源的接腳與感應電壓的接腳間的傳輸阻抗。此外，我們也討論去耦合電容的電容值，擺設位置，及其接腳電阻與電感抑制Ground Bounce效果上的影響。

The DC voltage fluctuation on power distribution network caused by simultaneous switching can result in signal integrity problems and limits the performance of high-speed digital circuit design. In multilayer printed circuit board, we use dedicated power and ground planes for power distribution network. In this thesis, we use cavity resonator method to analyze the parallel rectangular plane pair structure. Therefore a plane pair structure can be characterized in terms of self-and transfer- impedance in the frequency domain. We also study the effects of capacitance value, position of capacitors, and equivalent series resistance and inductance on the suppression of ground bounce.