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:
Jun. 04, 2002
Filed:
Jan. 17, 2001
Hideaki Nagaoka, Tokyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
The number of apparently independently operating memory sets can be changed by providing the same number of address setting circuits as that of memory cell arrays. Since the number of mounted address setting circuits increases compared with a case where the number of memory sets is fixed, the problem arises that the layout area in a semiconductor memory device increases. However, by providing a switching circuit for switching the correspondence relationship between memory cell arrays and address setting circuits in response to a signal selecting the number of memory sets, a semiconductor memory device capable of changing the number of memory sets which seemingly independently operate without providing the same number of address setting circuits as that of memory cell arrays.