SEMICONDUCTOR MEMORY DEVICE

摘要

PROBLEM TO BE SOLVED: To improve the refresh characteristic without increase of a sense current and without any delay of sense operation. SOLUTION: For the sense amplifier circuit group 5, a decoupling capacitor 10 is coupled with a sense power supply line 3 and this sense power supply line 3 is coupled selectively with the power supply node GND depending on the operation mode of the sense amplifier. During the sense operation, a bit line potential is defined with redistribution of charges between the decoupling capacitor 10 and bit line load capacitor.