Enlarged cell technique for conformal equivalent circuit model of power delivery network

Abstract

This paper describes a technique to improve a conformal equivalent circuit model for efficient transient analysis of a power delivery network (PDN). The conformal equivalent circuit of the PDN may include small capacitance due to an irregular cell, which has a small conductor area. The small value of the capacitance makes the time step size of an explicit leapfrog scheme be small to ensure its numerical stability condition. The proposed enlarged cell technique is based on enlargement of the conductor area in the irregular cell to derive a larger capacitance and avoid the time step size reduction.