LOGICAL OPERATION CIRCUIT AND LOGICAL OPERATION METHOD

摘要

A logical operation circuit and logical operation method for performing logical operation of data by using a ferroelectric capacitor. A logical operation circuit (1) comprises a ferroelectric capacitor (CF) and a transistor (MP). The ferroelectric capacitor (CF) holds a polarized state P1 (y=1) or P2 (y=0) corresponding to first data y to be operated. In operation, a first terminal (3) of the ferroelectric capacitor (CF) is precharged to a power supply potential Vdd, and a second terminal (5) is given a potential corresponding to second data x to be operated, namely, a grounding potential GND (x=1) or the power supply potential Vdd (x=0) through a bit line (BL). By adequately setting the threshold voltage Vth of the transistor (MP), the transistor (MP) is (on, on, on, off) for the combinations (0-0, 0-1, 1-0, 1-1) of x and y, respectively.