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.

Date of Patent:
Jun. 15, 2010

Filed:

Apr. 30, 2007
Applicants:

Shigeo Ohshima, Kawasaki, JP;

Kiminobu Suzuki, Yokohama, JP;

Inventors:

Shigeo Ohshima, Kawasaki, JP;

Kiminobu Suzuki, Yokohama, JP;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 17/50 (2006.01);
U.S. Cl.
CPC ...
Abstract

The verification equipment of a semiconductor integrated circuit in the present invention is included with a circuit net list extraction section that extracts the net list of a circuit, a circuit simulation execution section that executes a circuit simulation, based on the extracted net list, a finite impedance judgment section that judges existence or nonexistence of finite impedances, a floating error terminal judgment section that judges existence or nonexistence of floating error terminals by measuring finite impedances, a true floating error terminal judgment section that adds any one of a P channel-type transistor and an N channel-type transistor to terminals of the circuit where it is judged that there are floating error terminals and calculates changes in potential at the terminals and adds the other of the P channel-type transistor and the N channel-type transistor to the terminals and calculates changes in potential at the terminals, and an output section that outputs a judgment result of the floating error terminal judgment section and a judgment result of the true floating error terminal judgment section.


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