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:
Oct. 12, 1993
Filed:
Nov. 18, 1991
Applicant:
Inventor:
Junichi Shikatani, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
36518904 ; 36523005 ; 3652335 ;
Abstract
A semiconductor memory device in which dual ports are provided for selecting a specific memory cell from a memory cell matrix includes a driving state detection unit for detecting the state of driving word lines of the two ports and delivering a detection signal based on the detection, where one of the ports is in the writing state with regard to the memory cell, and a bit line short-circuiting unit responsive to the detection signal from the driving state detection unit for realizing a short-circuit between predetermined bit lines.