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. 02, 1998
Filed:
Jul. 12, 1996
Yukihide Suzuki, Akishima, JP;
Kanehide Kenmizaki, Kodaira, JP;
Tsugio Takahashi, Hamura, JP;
Masayuki Nakamura, Ome, JP;
Makoto Saeki, Hamura, JP;
Chisa Makimura, Hamura, JP;
Katsuo Komatsuzaki, Ibaraki-ken, JP;
Shunichi Sukegawa, Tsukuba, JP;
Hitachi, Ltd., Tokyo, JP;
Texas Instruments Inc., Dallas, TX (US);
Abstract
A dynamic RAM is provided with a main word lines; a plurality of subsidiary word lines which are arranged in the direction of bit lines crossing the main word line and to which a plurality of dynamic memory cells are connected; a plurality of subsidiary word selection lines which are extended so as to perpendicularly intersect the main word line and through which a selection signal for selecting one of the plurality of subsidiary word lines is transmitted; and a logic circuit for receiving a selection signal from the main word line and a selection signal from each of the subsidiary word selection lines to thereby form a selection signal for selecting one of the subsidiary word lines. In the dynamic RAM, the voltage level of each of the main word line and the subsidiary word selection lines is made to be equal to the ground potential when the line is in a not-selected state.