| 摘要 |
PURPOSE: The phase change memory device uses a plurality of sense amplification enable signals, it divides into the fixed single step and the operation of the amplifier circuit operates. CONSTITUTION: The signal generator(100) is created the first and the second sense amplification enable signal having the respective set activation range length. It supplies the fixed operating current to the phase transformation memory cell corresponding to the word line selection signal and the selection cell resistance sensor(120) senses the resistance value.
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