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. 09, 1993
Filed:
Jan. 28, 1991
Kenji Anami, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
A memory cell array of this semiconductor memory device includes a plurality of memory cells each having one transistor and one capacitor and is divided into a plurality of large memory cell groups, and each of the large memory cell groups is further divided into a plurality of small memory cell groups. A plurality of main row-selecting lines, a plurality of sub row-selecting lines and a plurality of word lines are provided in the memory cell array, each of the large memory cell groups and each of the small memory cell groups, respectively. Main global decoders select one of the main row-selecting lines in response to an internal address signal. Sub global decoders select a sub row-selecting line associated with the selected main row-selecting line in the large memory cell group selected by a large memory cell group selecting signal. Local decoders select a word line associated with the selected sub row-selecting line in the small memory cell group selected by a small memory cell group selecting signal.