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:
Dec. 26, 1989
Filed:
Jan. 12, 1988
Applicant:
Inventors:
Masashi Hashimoto, Ami, JP;
Tadashi Tachibana, Tsuchiura, JP;
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ;
U.S. Cl.
CPC ...
365200 ; 365236 ;
Abstract
A semiconductor memory device which has a memory portion and a counter to count rows and/or columns of the memory portion, the counter being so constructed to return to a reset mode at the beginning of an address counting sequence when coming up to an arbitrary address such that an address or addresses corresponding to a region of the memory containing one or more defective memory cells and occurring after the arbitrary address are inaccessible. The counter thereby comprises a defective bit relief circuit built into the memory device.