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:
Jan. 16, 1996
Filed:
Aug. 24, 1994
Applicant:
Inventor:
Sumio Ogawa, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365210 ; 365190 ; 365205 ; 365208 ;
Abstract
A shared sense amplifier circuit incorporated in a dynamic random access memory device is coupled at input/output nodes with dummy cells implemented by n-channel enhancement type field effect transistors for pulling one of the input/output nodes down upon access to one of the memory cells, and one of the enhancement type dummy cells rapidly turns off so that undershoot takes place at the associated input/output node due to channel resistance between the shared sense amplifier circuit and a bit line pair, thereby enlarging differential voltage applied between the input/output nodes of the shared sense amplifier circuit.