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. 13, 2011
Filed:
Aug. 12, 2009
Atsushi Kawasumi, Kawasaki, JP;
Yukihiro Urakawa, Kawasaki, JP;
Atsushi Kawasumi, Kawasaki, JP;
Yukihiro Urakawa, Kawasaki, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
The first power supply terminal is connected to source electrodes of the first and third transistors. The second power supply terminal is connected to source electrodes of the second and fourth transistors. When offset information of the memory cell is to be read, a voltage applied to the first power supply terminal and a voltage applied to the second power supply terminal are made equal. Then the voltage applied to the first power supply terminal is returned to the first potential, and the voltage applied to the second power supply terminal is returned to the second potential. When stress is generated in the first to fourth transistor included in the first or second inverter, the potential difference between the first power supply terminal and the second power supply terminal is made larger than a difference between the first potential and the second potential.