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:
Dec. 03, 2002
Filed:
Aug. 01, 2000
Applicant:
Inventor:
Yasushi Wada, Tokyo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/750 ;
U.S. Cl.
CPC ...
G06F 1/750 ;
Abstract
After a logic verification is made in a low-hierarchical block, a logic verification is made in a high-hierarchical block circuit in a state that the low-hierarchical block is not the subject of comparison. Even if the number of input ports in the low-hierarchical block increases due to a change of the circuit, logical equivalence of the high-hierarchical circuit is verified by using equivalence information of the input ports.