| 摘要 |
A semiconductor memory device includes a precharge unit to precharge a reference bit line and a selection bit line with the same potential, the selection bit line being connected to a target nonvolatile storage element from which data is to be read, a charge extraction unit to extract charges from the reference bit line and the selection bit line with the same current characteristic, a recharge unit which recharges the reference bit line with a current that is smaller than the charges extracted by the charge extraction unit, and a plurality of differential amplifiers which compare a potential of the reference bit line and a potential of the selection bit line with a reference potential. The semiconductor memory device further includes an output circuit which outputs data from the target nonvolatile storage element connected to the selection bit line, based on outputs of the differential amplifiers.
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