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:
Aug. 03, 1993
Filed:
Dec. 12, 1991
Applicant:
Inventors:
Syuso Fujii, Kawasaki, JP;
Takeshi Nagai, Tokyo, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36518901 ; 36518902 ; 365203 ; 365207 ;
Abstract
Memory cell arrays containing dynamic memory cells and write/read circuits for these memory cell arrays are arranged alternately. In the write/read circuit, read amplifiers are provided at a rate of one for every four columns (bit line pairs). This read amplifier is composed of a preamplifier and a main amplifier. Each column is provided with a multiplexer, which selects a column and connects it to the preamplifier of a read amplifier. The signal amplified by this preamplifier is supplied to the main amplifier. The current-mirror load circuit of this main amplifier is in common use by a plurality of read amplifiers.