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. 26, 2000
Filed:
Jan. 21, 1999
Kiyoshi Nishimura, Ukyo-ku, JP;
Takaaki Fuchikami, Ukyo-ku, JP;
Rohm Co., Ltd., Kyoto, JP;
Abstract
A switch SW 11 comprises a ferroelectric memory 26 and an AND gate 28. A data input line L11 and an output terminal of the ferroelectric memory 26 are connected to an input terminal of the AND gate 28. Also, output terminal of the AND gate 28 is connected to an AND input line L21. In order to write the switching data which switches the state of the switch SW11 either in open state or closed state into the ferroelectric capacitor 26, ferroelectric capacitors C11 and C12 are polarized in opposite directions with each other. The polarization is carried out in short period, and the polarization state can be maintained even when the power is turned off. So that, the switching data can be written repeatedly by changing direction of the voltage applied to the ferroelectric capacitors C11 and C12.