Semiconductor memory device and method of controlling the same
AssigneeFujitsu Limited
InventorAtsumasa Sako
Life of this patent
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Abstract
A semiconductor memory device includes a memory cell array in which a plurality of memory cells for storing data are arranged, a sense amplifier for amplifying the data in the memory cell, a first power source, and a second power source lower than the first power source. In a first step, the sense amplifier receives power supply from the first power source to amplify the data in the memory cell. In a second step, the sense amplifier does not receive power supply either from the first power source or from the second power source. In a third step, the sense amplifier receives power supply from the second power source to amplify the data in the memory cell.
Claims17
A semiconductor memory device, comprising:
- a memory cell array in which a plurality of memory cells for storing data are arranged;
- a sense amplifier for amplifying the data in said memory cell;
- a first power source;
- a second power source lower than said first power source;
- and
- a control circuit for performing control in such a manner that said sense amplifier receives power supply from said first power source to amplify the data in said memory cell in a first step, does not receive power supply either from said first power source or from said second power source in a second step, and receives power supply from said second power source to amplify the data in said memory cell in a third step.
A method of controlling a semiconductor memory device comprising a memory cell array in which a plurality of memory cells for storing data are arranged, a sense amplifier for amplifying the data in said memory cell, a first power source, and a second power source lower than said first power source, comprising:
- a first step in which said sense amplifier receives power supply from said first power source to amplify the data in said memory cell;
- a second step in which said sense amplifier does not receive power supply either from said first power source or from said second power source;
- and
- a third step in which said sense amplifier receives power supply from said second power source to amplify the data in said memory cell.
Dependencies are inferred from the claim text.