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    • 2. 发明授权
    • Semiconductor memory device
    • 半导体存储器件
    • US07626883B2
    • 2009-12-01
    • US12149549
    • 2008-05-05
    • Hiroki ShimanoKazutami Arimoto
    • Hiroki ShimanoKazutami Arimoto
    • G11C5/14
    • G11C5/14G11C5/063G11C5/148G11C11/406G11C11/4074G11C2211/4067
    • During a stand-by state in which power supply is cut off, a high-voltage power supply control circuit isolates a global negative voltage line transmitting a negative voltage and a local negative voltage line provided corresponding to each respective sub array block from each other and isolates a global ground line and a local ground line transmitting a ground voltage from each other. These local ground line and local negative voltage line are charged to a high voltage level through a high voltage line before cut-off from the corresponding power supply. A leakage current path from a word line to the negative voltage line or the ground line is cut off, so that the word line in a non-selected state can reliably be maintained at a non-selection voltage. Thus, in a low power consumption stand-by mode, data stored in a memory cell can be held in a stable manner.
    • 在电源被切断的待机状态下,高电压电源控制电路将发送负电压的全局负电压线与对应于每个各个子阵列块的局部负电压线相互隔离, 隔离全球接地线和传输地电压的局部接地线。 这些本地接地线和局部负电压线在从相应电源切断之前通过高压线充电到高电压电平。 从字线到负电压线或接地线的漏电流路径被切断,使得未选择状态的字线可以可靠地保持在非选择电压。 因此,在低功耗待机模式中,可以以稳定的方式保存存储在存储单元中的数据。