Patent ID: 6453444
Filing Date: 2002-09-17
Classification: G06F

Abstract:
In the modeling of an integrated circuit a method for extracting inductances of the interconnections of the integrated circuit which provides a positive semi-definte inductance matrix comprising the steps of:a. determining power distribution lines and ground distribution lines of the integrated circuit; b. deriving from the power distribution lines and the ground distribution lines of the integrated circuit a plurality of disjointed interaction regions, each interaction region having a respective section of one or more signal lines of the integrated circuit, respective sections of two or more of the power distribution lines and/or the ground distribution lines; c. in each interaction region fracturing each section of the one or more signal lines, each section of the power distribution lines and each section of the ground distribution lines in the interaction region into horizontal and vertical segments; d. in each interaction region determining a plurality of coupled loop inductances each defined by a current loop passing through a respective one of the signal line segments in the interaction region and returning through a respective parallel and adjacent one of the power distribution line segments and the ground distribution line segments in the interaction region; e. in each interaction region eliminating all current loops that do not pass a net current through a signal line segment in the interaction region; and f. in each interaction region combining the coupled loop inductances into a reduced set of equivalent inductances that model the inductance of each signal line section in the interaction region.