Patent ID: 7911863
Filing Date: 2011-03-22
Classification: G11C

Abstract:
1. A semiconductor device, comprising: a DRAM cell; a sense amplifier to which a power supply pair is input, the power supply pair including a first power supply and a second power supply; a power supply circuit to which a power supply voltage and a ground voltage are input; and a sense amplifier control circuit determining a potential of the power supply pair, wherein the sense amplifier precharges a potential of a bit line pair to a power supply potential or a ground potential before amplifying information stored in the DRAM cell, the DRAM cell being connected to either one of the bit line pair, and the sense amplifier control circuit controls the power supply pair so that a potential difference of the bit line pair becomes larger than a differential potential between the power supply voltage and the ground voltage when the sense amplifier performs an amplification operation.