Correlated effects of decoupling capacitors and vias loaded in the PCB power-bus

PCB power-bus에 장하된, 결합제거 커패시터와 금속선의 상관관계적 영향 연구

  • Kahng, Sung-Tek (Dept. of Information and Telecommunication Eng., University of Incheon)
  • 강승택 (인천대학교 정보통신공학과)
  • Published : 2005.11.05

Abstract

This paper investigates how the PCB power-bus structure's characteristics are influenced by the loading of decoupling capacitors that are placed close to vias, on purpose or not. It is worthwhile to see the correlated effects of the aforementioned lumped elements in that when they inevitably share one DC power-bus they will result in positive or negative changes in the PCB EMC design. The EM fields and impedance profiles are rigously calculated on the PCB power-bus cases loaded with the above components and their effects will be given to bring better PCB EMC countermeasures.

Keywords

PCB level EMC;PCB power-bus;decoupling capacitors;vias;field calculation