| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor storage device which can hold data when a power supply is cut off, and reduce power consumption. SOLUTION: This storage device is provided with a transistor T2 and a capacitor C1 which consists of a storage electrode 22 and a plate electrode 21. The storage electrode 22 is connected with a source or a drain electrode 23 of the transistor T2 . A plate voltage generating circuit 1 generates a potential to be applied to the plate electrode 21. The impedance between the circuit 1 and the plate electrode 21 is high when the power supply voltage is cut off by a switch element T1 , as compared with the time when the power supply voltage is given. Before the power supply voltage is cut off, and the output voltage of the plate voltage generating circuit 1 starts to decrease, the impedance becomes high. After the power supply is switched on and the output voltage of the plate voltage generating circuit 1 is stabilized, the impedance becomes low. |
