Patent ID: 7681156

Claim:
A circuit simulator which performs a simulation of a transmission circuit in which a driver circuit which transmits a signal and a receiver circuit which receives the signal are coupled to each other by a line, the circuit simulator comprising: a DC analysis section to analyze a static stable potential in the line based on an assumption that a static potential is applied to each position on the transmission circuit and is stable, once an AC coupling component which blocks a DC current that heads for the receiver circuit from the driver circuit while allowing an AC current to pass therethrough is connected in the line, the static stable potential being at the receiver circuit side in the line; an initial potential application section to apply, as an initial potential in the simulation, the stable potential obtained by the DC analysis section to an application position on the driver circuit side from the AC coupling component in a flow of the signal through the transmission circuit; and a simulation section to perform the simulation of the transmission circuit under the initial potential applied by the initial potential application section wherein the circuit simulator is executed by a computer.