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:
Sep. 20, 2005
Filed:
Mar. 28, 2002
Hiroyuki Takahashi, Kanagawa, JP;
Hideo Inaba, Kanagawa, JP;
Atsushi Nakagawa, Kanagawa, JP;
NEC Electronics Corporation, , JP;
Abstract
A semiconductor memory device is provided, which is capable of effectively reducing a current comsumption caused by a self-refresh operation in a stand-by mode. In the refresh operation in the stand-by mode, under the control by a refresh control circuitB, firstly, a suppression is made for current driving abilities of sense amplifiersA˜D provided for amplifying data signals appearing on bit lines, and secondly, an expansion is made of a pulse width of a row enable signal RE, which defines a period of time for selecting word lines WL, and thirdly, parallel activations of plural word lines are made based on the row enable signal RE with the expanded pulse width, thereby reducing the frequency of operations of the circuit system associated with the refresh operations, resulting in a suppression of the current consumption.