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:
Mar. 25, 2003
Filed:
Oct. 18, 2002
Applicant:
Inventors:
Toru Endo, Kawasaki, JP;
Shoichiro Kawashima, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 1/122 ;
U.S. Cl.
CPC ...
G11C 1/122 ;
Abstract
A semiconductor device includes memory cells of one-transistor one-capacitor connected to n+1 bit lines that are simultaneously driven, sense amplifiers connected to the n+1 bit lines, and a reference voltage generating circuit generates an average voltage of a highest voltage and a lowest voltage among bit line voltages that are obtained by accessing the n+1 bit lines in parallel, and supplying the average voltage to the sense amplifiers as a reference voltage.