Abstract: A node and coupling capacity selecting portion 4 extracts nodes (NDI) which simultaneously change from a net list (NTL) of a circuit diagram based on an input pattern (IP) and extracts a coupling capacity (CCI) not less than a designated value, and determines a node whose coupling capacity should be considered from the extraction result, and creats and holds information (ND/CC) of the judged nodes and the coupling capacities thereof. Then, simulation of the selected nodes including the coupling capacities thereof is conducted so that the result of the simulation is displayed in a waveform to thereby enable an efficient and highly precise crosstalk verification.

Abstract: A simulator includes a timing simulation section executing timing simulation for a logic circuit of an electronic component, a time management section extracting logical operation time at an output terminal of the electronic component from a result of the simulation, a transmission line simulation section executing simulation of a transmission line connected to the output terminal from the logical operation time extracted by the time management section, and a simulation result processing section combining the result of the simulation by the timing simulation section and a result of the transmission line simulation by the transmission line simulation section.