The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 2001
Filed:
Dec. 02, 1996
Matsushita Electronics Corporation, Osaka, JP;
Abstract
A circuit extracting apparatus or method of the present invention extracts circuit information which allows a drain current and a gate capacitance in an actual device to be reproduced with high fidelity in circuit simulation. Transistor-portion-configuration recognizing means recognizes the configuration of a transistor portion in the mask layout of a semiconductor circuit so as to generate transistor-portion-configuration data. Transistor-size calculating means calculates an equivalent transistor size based on the transistor-portion-configuration data, such that a drain current in the circuit simulation coincides with the drain current in the actual device. Corrective-capacitance generating means obtains the difference between a gate capacitance in the circuit simulation using the equivalent transistor size and the gate capacitance in the actual device so as to virtually generate a corrective capacitance having a capacitance value corresponding to the obtained difference. The equivalent transistor size and the corrective capacitance serve as the circuit information in the circuit simulation.