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. 11, 2003
Filed:
May. 23, 2002
Kinya Ashikaga, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A ferroelectric memory device in which an imprint is prevented, and a method of operating the ferroelectric memory device to prevent its characteristics from deteriorating due to an imprint. The ferroelectric memory device includes a sense amplifier having first and second transistors which connect first and third sub-bit lines to a ground in accordance with a sense amplifier control signal, third and fourth transistors which connect the first sub-bit line with a fourth sub-bit line and further connect the third sub-bit line with a second sub-bit line in accordance with a first switching control signal, and fifth and sixth transistors which connect the first sub-bit line with the second sub-bit line and further connect the third sub-bit line with the fourth sub-bit line in accordance with a second switching control signal.