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    • 8. 发明申请
    • Semiconductor memory device
    • 半导体存储器件
    • US20060087876A1
    • 2006-04-27
    • US11253626
    • 2005-10-20
    • Beak-hyung ChoSang-beom KangHyung-rok Oh
    • Beak-hyung ChoSang-beom KangHyung-rok Oh
    • G11C11/00
    • G11C13/0004G11C13/0038G11C13/0069
    • A semiconductor memory device includes: phase-change memory cells whose states change to a set resistance state or a reset resistance state in response to an applied current pulse; a set pulse driving circuit outputting a set current pulse having first through n-th stages in response to a first control signal and a set control signal, wherein current amounts of the first through n-th stages are sequentially reduced and are all greater than a reference current amount; a reset pulse driving circuit outputting a reset current pulse in response to a second control signal; a pull-down device activating the set pulse driving circuit and the reset pulse driving circuit in response to a third control signal; and a write driver control circuit outputting the first through third control signals in response to write data, a set pulse width control signal, and a reset pulse width control signal.
    • 半导体存储器件包括:响应于所施加的电流脉冲,其状态改变为设定电阻状态或复位电阻状态的相变存储器单元; 设置脉冲驱动电路,响应于第一控制信号和设定控制信号输出具有第一到第n级的设定电流脉冲,其中第一至第n级的电流量顺序地减小并且都大于a 参考电流量; 复位脉冲驱动电路,响应于第二控制信号输出复位电流脉冲; 响应于第三控制信号激活所述设定脉冲驱动电路和所述复位脉冲驱动电路的下拉装置; 以及响应写入数据,设定的脉冲宽度控制信号和复位脉冲宽度控制信号而输出第一至第三控制信号的写入驱动器控制电路。