Showing papers by "Jun Fan published in 1998"

Modeling multilayered PCB power-bus designs using an MPIE based circuit extraction technique

Abstract: A circuit extraction tool (CEMPIE) has been developed based on the mixed-potential integral equation (MPIE) using a quasi-static approximation. A power-bus in a multi-layered PCB consisting of a pair of dedicated ground and power planes is studied using this tool. The distributed behavior of a power-bus is represented by a collection of passive circuit elements, which is valid up to several gigahertz. The decoupling performance of a power-bus due to its layer spacing and the dielectric constant is evaluated for simple test geometries. The impact of the relative distance between the noise source and the potential receiver is also studied. Novel structures such as a power island were studied in both thin and thick boards, and the decoupling performance due to the locations and values of the decoupling capacitors were also investigated.

Incorporating vertical discontinuities in power-bus modeling using a mixed-potential integral equation and circuit extraction formulation

Abstract: Noise on the DC power-bus attributed to device switching is among the primary sources of EMI and signal integrity problems. A mixed-potential integral equation formulation with circuit extraction approach is used to model the planar multi-layer power-bus geometry, which can also include arbitrary shaped power regions on multiple layers. Incorporating vertical discontinuities, e.g. decoupling capacitor interconnects, is a critical aspect of the modeling, and must be done properly since they are included as a lumped element model and not as a part of the MPIE formulation. Agreement with experimental results verifies the validity of the present approach.