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:
Aug. 11, 2009
Filed:
Jan. 29, 2007
Applicants:
Noriyasu Kumazaki, Kawasaki, JP;
Keiji Maruyama, Yokohama, JP;
Inventors:
Noriyasu Kumazaki, Kawasaki, JP;
Keiji Maruyama, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L 7/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor memory device includes a n-channel type MOSFET in which a drain and a gate are connected to an external power supply and a source and a back gate are connected each other. A node is connected to the source and the back gate of the n-channel type MOSFET, and a detector for detecting an input of the external power supply based on a potential of the node.