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. 15, 2009
Filed:
May. 15, 2007
Yoshiaki Okuyama, Kawasaki, JP;
Atsushi Takeuchi, Kawasaki, JP;
Tomohiro Kawakubo, Kawasaki, JP;
Fujitsu Microelectronics Limited, Tokyo, JP;
Abstract
A semiconductor memory device includes a DRAM memory core circuit including a word line, a power supply circuit configured to operate in a selected one of a first state and a second state to generate a predetermined power supply voltage for provision to the DRAM memory core circuit, the power supply circuit consuming a larger electric current in the first state than in the second state, and a control circuit configured to control the power supply circuit such that the power supply circuit is shifted from the first state to the second state, and is then brought back to the first state during a period from activation of the word line to deactivation of the word line.