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. 12, 2011
Filed:
Dec. 08, 2005
Applicants:
Noriko Ishibashi, Mishima-gun, JP;
Masaaki Hirata, Ideda, JP;
Nobufusa Iwanishi, Hirakata, JP;
Inventors:
Assignee:
Panasonic Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 17/50 (2006.01);
U.S. Cl.
CPC ...
Abstract
An input pin capacitance of a cell is obtained in advance in a function expression, and a delay is calculated in such manner that the input pin capacitance is calculated in functions of an input slew and a drive load capacitance in each instance. In a cell characterizing process, a total volume of a current running into an input terminal before a voltage value of the input terminal reaches a reference voltage is obtained so that a value approximate to a real input pin capacitance can be obtained.