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:
Nov. 09, 1993
Filed:
Sep. 30, 1991
Applicant:
Inventors:
Hirofumi Yasuda, Nagano, JP;
Akira Uematsu, Nagano, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ;
U.S. Cl.
CPC ...
36518901 ; 365190 ; 365207 ; 365208 ;
Abstract
A semiconductor memory device for reading data from a selected memory cell. The memory cells are arranged in an array. First bit lines and word lines, coupled to the memory cells, are arranged in a matrix. The word lines select the selected cell. An amplification circuit amplifies the current passing through the selected memory cell and is coupled to the first bit. A second bit line is coupled to the amplification circuit and carries the amplified current. A sensing circuit coupled to the second bit line senses the current on the second bit line. As a result, the current passing through the selected memory cell is detected.