Patent ID: 7222060
Filing Date: 2007-05-22
Classification: G06F

Abstract:
1. A circuit simulation apparatus comprising: a simulation executing unit which reads a circuit net list in which connection descriptions of a circuit to be simulated are stored, and which calculates changes in the current and voltage of said circuit to be simulated, using a transistor model, and a diffusion-length-dependent parameter correcting unit which creates an approximate expression for determining a corrected value of a diffusion-length-dependent parameter for a transistor model created for a transistor having a predetermined diffusion length, and which calculates and stores a corrected value of said diffusion-length-dependent parameter for said transistor model used by the simulation executing unit using said approximate expression to model a transistor having a diffusion length different from that of said transistor model, wherein said transistor includes a source region and a drain region, and an isolation region surrounds said source region and drain region, and wherein said diffusion length of said transistor is defined by a distance between boundaries of said isolation region in a direction from the source region to the drain region.