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:
Jun. 04, 1991
Filed:
Apr. 26, 1990
Applicant:
Inventor:
Takaki Kohno, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36518901 ; 365190 ; 365208 ; 365226 ;
Abstract
A semiconductor memory device includes a plurality of memory cells organized in a matrix structure and a sense-amplifier circuit for detecting a voltage at a digit line which changes in accordance with the stored information in the accessed memory cell. The sense-amplifier circuit includes at least six field effect transistors of which two pair each are for effecting current amplification to produce a sense output to an inverter circuit or through a comparison detector or directly. The amplification of current is increased and the amplitude of sense-amplifier output voltage is reduced so that the sense-amplifier output can be inverted at a high speed.