Patent ID: 6557154
Filing Date: 2003-04-29
Classification: G06F,H05K

Abstract:
A printed circuit board (PCB) design support system comprising:an inputting means to input an information about ground plane structure, power plane structure and layout of a PCB including information about positions of mounting active elements and at least one decoupling capacitor; a model building means to build a circuit model expressed by an equivalent circuit for calculating, using said input information, voltage distribution between said ground plane and said power plane; a calculating means to select a specified frequency and to calculate voltage distribution occurring at said specified frequency between said ground plane and said power plane; a displaying means to display said obtained voltage distribution in a form of a two-dimensional voltage distribution map in a manner to correspond to a shape of said PCB; and a storing means to store the result obtained from operations, wherein the model building means expresses the equivalent circuit as a planar matrix of nodes, each of the adjacent nodes being connected by an inductor and a resistor, and each of the nodes being further connected to a grounded capacitor.