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:
Apr. 11, 2006
Filed:
Jan. 22, 2003
Michitaka Kameyama, Sendai, JP;
Takahiro Hanyu, Sendai, JP;
Hiromitsu Kimura, Kyoto, JP;
Yoshikazu Fujimori, Kyoto, JP;
Takashi Nakamura, Kyoto, JP;
Hidemi Takasu, Kyoto, JP;
Michitaka Kameyama, Sendai, JP;
Takahiro Hanyu, Sendai, JP;
Hiromitsu Kimura, Kyoto, JP;
Yoshikazu Fujimori, Kyoto, JP;
Takashi Nakamura, Kyoto, JP;
Hidemi Takasu, Kyoto, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
To provide a logical operation circuit and a logical operation method which can perform a logical operation using a ferroelectric capacitor. A logical operation circuithas ferroelectric capacitors CFand CFand a transistor MP. The ferroelectric capacitor CFcan retain a polarization state Pcorresponding to a logical operator. In an operation and storage process, a source potential Vdd corresponding to first operation target data y=1 and a ground potential GND corresponding to second operation target data y=0 are given to a first terminaland a second terminal, respectively, of the ferroelectric capacitor CF. The polarization state of the ferroelectric capacitor CFis thereby shifted to P. A residual polarization state corresponding to the polarization state Pis P. The residual polarization state changes (P, P, Por P) depending on the combination of yand y(0-0, 0-1, 1-0 and 1-1). In a reading process after that, an output corresponding to the residual polarization state is obtained via the transistor MP.