Patent ID: 6519556
Filing Date: 2003-02-11
Classification: G06F

Abstract:
A simulating method in which a simulation model of a circuit board with one current change source is formed, comprising:regarding said circuit board as an aggregate of doughnut boards having a form of thin concentric circles with said current change source as a center; approximating said aggregate of doughnut boards to an aggregate of rectangular boards with respective circumferences of the doughnut boards as widths and respective cut-lengths of the same as lengths; forming a transmission line model for each rectangular board in said aggregate of rectangular boards while each rectangular board is a transmission line; connecting said transmission line models in series to make said simulation model of said circuit board; connecting said current change source to a board center end of said simulation model of said circuit board; connecting an ideal power to a board periphery end of said simulation model of said circuit board; connecting a de-coupling capacitor model to a periphery of said current change source; and observing connecting points of said transmission line models while changing the current of said current change source.