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:
Feb. 08, 2005
Filed:
Oct. 15, 2003
Applicant:
Yasuo Itoh, Yokohama, JP;
Inventor:
Yasuo Itoh, Yokohama, JP;
Assignee:
Kabushiki Kaisha Toshiba, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11C007/02 ;
U.S. Cl.
CPC ...
Abstract
A dummy cell (reference electric potential generating circuit) DC has a paraelectric capacitor DCCand a ferro-electric capacitor DCC. One end of the paraelectric capacitor DCCand one end of the ferro-electric capacitor DCCare commonly connected to a node N. A dummy plate electric potential DPLis supplied to the other end of the paraelectric capacitor DCC, and a dummy plate electric potential DPLis supplied to the other end of the ferro-electric capacitor DCC. When data of a memory cell MC is read at a bit line (selective bit line) BL, a reference electric potential is supplied to a bit line (reference bit line) BLfrom the dummy cell DC.