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, 2002
Filed:
Jun. 09, 2000
Naoya Watanabe, Hyogo, JP;
Akira Yamazaki, Hyogo, JP;
Kazutami Arimoto, Hyogo, JP;
Takeshi Fujino, Hyogo, JP;
Isamu Hayashi, Hyogo, JP;
Hideyuki Noda, Hyogo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
Read data line pairs, write data line pairs, a spare read data line pair, and a spare write data line pair are provided extending in the column direction over a memory cell array. Spare bit repair is performed by replacing a data line pair. Column redundancy control circuit changes the timing for outputting the result of spare determination for a data write mode and for a data read mode. A semiconductor memory device suitable for merging with a logic and capable of reducing the current consumption and achieving a higher operation frequency is provided.