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:
May. 31, 2005
Filed:
Dec. 06, 2002
Koji Miyashita, Matsumoto, JP;
Tadatoshi Nakajima, Suwa, JP;
Koji Miyashita, Matsumoto, JP;
Tadatoshi Nakajima, Suwa, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
A semiconductor memory device has a first precharge transistor connecting a potential supply line to one end of a bit line when the bit line is precharged and a second precharge transistor connecting the potential supply line to the other end of the bit line when the bit line is precharged. To a gate of the first precharge transistor is inputted a first precharge signal, and to a gate of the second precharge transistor is inputted a second precharge signal generated based on a chip-select signal and the first precharge signal. The second precharge transistor is brought into a cut-off state during a standby state in which a memory cell corresponding to the second precharge transistor does not read nor write data but holds date.