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:
Jul. 09, 1991
Filed:
Jul. 19, 1989
Shooji Kitazawa, Tokyo, JP;
Teruhiro Harada, Tokyo, JP;
Abstract
In a memory MOS semiconductor memory device comprising a memory matrix having semiconductor memory elements arranged in rows and columns, the memory elements in the same rows being connected to the respective word lines, and the memory elements in the same columns being connected to the respective source lines and data lines. A row decoder outputs a row selection signal to one of the rows of the memory elements through the word lines, while a column decoder outputs a column selection signal to one of the columns through the source lines. A common data line is electrically coupled to a plurality of the data lines, a constant voltage is applied from a common circuit to the data lines through the common data line, and the current required for maintaining the common data line at a constant voltage is detected by a detecting circuit.