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. 15, 2001
Filed:
Feb. 23, 1999
Kazuhiko Kajigaya, Gakuennishi, JP;
Katsuyuki Sato, Gakuennishi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A dynamic RAM is arranged such that a common data line in each of the non-selected ones of the divided memory arrays is connected to a pair of common source lines of a sense amplifier corresponding to the memory array concerned, whereby the potential of the common data line is set at a medium level which is substantially equal to the potential of the data lines by utilizing the medium potential of the pair of common source lines and a relatively large parasitic capacity thereof, thereby maintaining the data lines at the half-precharge level. The pair of common source lines are shorted to each other during the non-select period of the memory arrays, so that the common source lines have a medium level which is substantially equal to the half-precharge level of the data lines.