Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yoshikazu Fujimori0
Date of Patent
September 23, 2008
0Patent Application Number
108894020
Date Filed
July 12, 2004
0Patent Primary Examiner
Patent abstract
To provide a logical operation circuit and a logical operation device which can performs a logical operation using a ferroelectric capacitor. The area ratio between the ferroelectric capacitors CF1 and CF2 are set such that the potential difference Vdef between voltages Va1 and Va0 is as large as possible, and a transistor MP has a threshold voltage Vth which is about ½·(Va0+Va1). Thus, the ON/OFF operation margin of the transistor MP can be significantly large. As a result, a reading process can be performed at a high speed without using an amplifying circuit such as a sense amplifier. Also, the logical operation circuit and the logical operation device can be highly integrated with ease since no sense amplifier is used.
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