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:
May. 31, 1988
Filed:
Oct. 28, 1985
Mitsugi Ogura, Yokohama, JP;
Yasuo Itoh, Yokohama, JP;
Kabushika Kaisha Toshiba, Kawasaki, JP;
Abstract
In a dynamic semiconductor memory, bit line pairs and word lines are perpendicular to each other and arranged in a matrix constituted by memory cells. Dummy cells are arranged at intersections between the bit line pairs and a pair of dummy cell word lines. The capacitance of each dummy cell is half that of the memory cell. A pre-sense amplifier and a main sense amplifier are arranged in each pair of bit lines. When data is read out from a selected memory cell, the pre-sense amplifiers are simultaneously activated to perform the pre-sensing operation. However, in the main sensing operation, only one specific main sense amplifier arranged in a certain bit line pair including the bit line connected to the selected memory cell is activated.