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. 09, 1995
Filed:
Sep. 27, 1993
Applicant:
Inventors:
Yuko Ozeki, Hyogo, JP;
Yoshio Fudeyasu, Hyogo, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
3652335 ; 365191 ; 365233 ;
Abstract
A dynamic random access memory (DRAM) includes an improved column system enable circuit. The circuit provides a column system enable signal /CE in response to an externally applied timing control signal Stc. An ATD detects transition of an address signal after being activated in response to the signal /CE. Since an activation timing of ATD can be determined by an external signal, it is possible to test easily an address transition detecting operation immediately after activation of ATD. Therefore, it is possible to shorten time required for the test.