Circuit simulation model extracting method and device

A circuit simulation model extracting method, comprising:

• a memory step for storing logic information expressing a plurality of logic function elements constituting a logic circuit, and wiring information about a plurality of components that correspond to the plurality of logic function elements on a printed circuit board, the wiring information for a plurality of printed circuit boards including a driver for performing driving based on signals from a power source, a receiver for receiving the signals, and a net for expressing wiring that interconnects the driver and the receiver;
• an extracting step for extracting the wiring information and logic information to be used for executing circuit simulation from among the wiring information and logic information stored in the memory step, the extracting step extracting from among the wiring information for the plurality of printed circuit boards stored in the memory step, the wiring information about the printed circuit boards that is to be used for executing the circuit simulation;
• a circuit model conversion step for converting the wiring information and logic information extracted by the extracting step into a circuit model suitable for executing the circuit simulation, the circuit model conversion step further comprising:
• a subcircuit storage step for storing as circuit simulation data, a power source subcircuit corresponding to the power source, a driver subcircuit corresponding to the driver, a receiver subcircuit corresponding to the receiver, and a line subcircuit corresponding to the net;
• a power source step for reading the power source subcircuit stored by a power source circuit in the subcircuit storage step;
• a driver step for converting the driver by means of a driver circuit into the driver subcircuit stored in the subcircuit storage step;
• a line step for converting the net by means of a line circuit into the line subcircuit stored in the subcircuit storage step;
• and
• a receiver step for converting the receiver by means of a receiver circuit into the receiver subcircuit stored in the subcircuit storage step;
• and
• a simulation step for executing the circuit simulation based on the circuit model converted in the circuit model conversion step, and identifying an electrical characteristic between the plurality of components that correspond to the wiring information and logic information extracted by the extracting step.

A method of preparing a logic circuit model for a logic circuit to be designed and simulated by computer, comprising:

• constructing a first circuit model of said logic circuit by
• obtaining logic information for the logic circuit having a plurality of logic elements;
• obtaining wiring information from the logic circuit corresponding to logic elements placed on one or more printed circuit boards, the wiring information being modeled by logic elements, including a driver for performing driving based on signals from a power source, a receiver for receiving the signals, and a net for wiring that interconnects the driver and receiver;
• combining the logic information and the wiring information to form a first circuit model;
• forming a second circuit model by converting the wiring information into a form including electrical characteristics, including converting the driver into a driver subcircuit, the net into a line subcircuit, and the receiver into a receiver subcircuit, the driver, time and receiver subcircuit, and the receiver into a receiver subcircuit, such subcircuits identifying electrical characteristics in the second circuit model;
• simulating the second circuit model to determine circuit performance based on the electrical characteristics.