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:
Sep. 04, 2007
Filed:
Mar. 03, 2006
Takahiro Hirai, Yokohama, JP;
Katsuyuki Naito, Tokyo, JP;
Koichi Kubo, Yokohama, JP;
Yuichi Motoi, Kawasaki, JP;
Hiroshi Watanabe, Yokohama, JP;
Takahiro Hirai, Yokohama, JP;
Katsuyuki Naito, Tokyo, JP;
Koichi Kubo, Yokohama, JP;
Yuichi Motoi, Kawasaki, JP;
Hiroshi Watanabe, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
An data recording device according to an aspect of the present invention includes a memory cell array in a memory chip, a refresh circuit which executes a refreshing of the memory cell array, a refresh control circuit which executes refreshing at a time interval which is shorter than a data hold time and manages a data hold time, and an internal power source which supplies a power source electric potential to the refresh circuit and the refresh control circuit in a state in which the data recording device is removed from an external device.