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. 13, 2010
Filed:
Sep. 06, 2007
Yoshihiro Masumura, Kanagawa, JP;
Yoshihiro Masumura, Kanagawa, JP;
NEC Electronics Corporation, Kanagawa, JP;
Abstract
In a method for designing a semiconductor integrated device, there are prepared a first power supply cell having a first decoupling capacitance and a second power supply cell having a second decoupling capacitance larger than the first decoupling capacitance. One of the first and second power supply cells is arranged in each of power supply cell areas of an input/output circuit area of the semiconductor integrated device in accordance with frequency-to-impedance characteristics at a predetermined point of input/output buffers of the input/output circuit area between first and second power supply lines thereof and frequency-to-noise current characteristics of the input/output buffers of the input/output circuit area between the first and second power supply lines.