SEMICONDUCTOR MEMORY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a semiconductor memory device in which the enlargement of area due to the arrangement of sub-amplifies can be reduced and power consumption for the sub-amplifiers can be reduced.

SOLUTION: In the semiconductor memory device having a bank provided with the prescribed storage capacity, a sub-amplifier region is arranged at a center position at which the bank is divided into two. The sub-amplifier region provided with a plurality of sub-amplifiers connected to sense amplifier sets arranged at divided two memory regions through LIO and a sub-amplifier control circuit controlling these sub-amplifiers. When a word line is selected by the sub-amplifier control circuit, power consumption caused by activation of sub-amplifiers is reduced by performing control operation activating only one side out of sub-amplifiers positioned at both sides of the word line.

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