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    • 1. 发明授权
    • Semiconductor memory
    • 半导体存储器
    • US06496428B2
    • 2002-12-17
    • US09964642
    • 2001-09-28
    • Chikai OhnoHirokazu YamazakiHideaki Suzuki
    • Chikai OhnoHirokazu YamazakiHideaki Suzuki
    • G11C700
    • G11C29/789G11C29/84G11C29/846
    • A redundancy information region having memory cells for retaining relief information indicating the locations of defective memory cells is arranged closer to at least one of a word driver or a plate driver than a memory cell region and a redundancy memory cell region. Since the memory cells of the redundancy information region start operation earlier, a relief/no-relief judgment can be made earlier, allowing reduction in access time. Besides, in memory cell operations, the defective memory cells are deselected in accordance with address information held in a redundancy address region. Redundancy memory cells for relieving the defective memory cells are selected in accordance with the relief information held in a redundancy flag region. Since the redundancy memory cells are selected without using the address information, it is possible to reduce the time that elapses before the redundancy memory cells are selected after the selection of word lines.
    • 具有用于保存指示有缺陷存储单元的位置的释放信息的存储单元的冗余信息区被布置成比存储单元区域和冗余存储单元区域更靠近字驱动器或板驱动器中的至少一个。 由于冗余信息区域的存储单元早期开始操作,因此可以更早地进行缓解/不缓解判断,从而允许访问时间减少。 此外,在存储单元操作中,根据保存在冗余地址区域中的地址信息来取消选择不良存储单元。 根据保存在冗余标志区域中的补救信息来选择用于解除有缺陷的存储器单元的冗余存储单元。 由于在不使用地址信息的情况下选择冗余存储单元,所以可以在选择字线之后减少冗余存储单元之前经过的时间。
    • 2. 发明授权
    • Reset circuit
    • 复位电路
    • US07545186B2
    • 2009-06-09
    • US10998060
    • 2004-11-29
    • Hideaki SuzukiHirokazu Yamazaki
    • Hideaki SuzukiHirokazu Yamazaki
    • H02H3/24
    • H03K17/223H03K3/356008
    • A reset circuit includes a power supply detection circuit, a power-down detection circuit, and an output circuit. The power supply detection circuit outputs a first signal when a first voltage according to a power supply voltage is higher than a first threshold and outputting a second signal when the first voltage is lower than the first threshold during power-on and power-down. The power-down detection circuit outputs a third signal when a second voltage according to the power supply voltage becomes lower than a second threshold after the second signal is outputted during power-down. The output circuit outputs a power-on reset signal which changes from low to high when the first signal is outputted during power-on and outputs a power-down reset signal which changes from low to high when the third signal is outputted during power-down.
    • 复位电路包括电源检测电路,掉电检测电路和输出电路。 当电源电压的第一电压高于第一阈值时,电源检测电路输出第一信号,并且在上电和掉电期间当第一电压低于第一阈值时输出第二信号。 当在掉电期间输出第二信号之后,当根据电源电压的第二电压变得低于第二阈值时,掉电检测电路输出第三信号。 输出电路在上电时输出第一个信号时,输出从低电平变为高电平的上电复位信号,并在断电时输出第三个信号输出时从低电平变为高电平的掉电复位信号 。
    • 3. 发明申请
    • Reset circuit
    • 复位电路
    • US20050275437A1
    • 2005-12-15
    • US10998060
    • 2004-11-29
    • Hideaki SuzukiHirokazu Yamazaki
    • Hideaki SuzukiHirokazu Yamazaki
    • H03K3/356H03K17/22H03L7/00
    • H03K17/223H03K3/356008
    • A reset circuit includes a power supply detection circuit, a power-down detection circuit, and an output circuit. The power supply detection circuit outputs a first signal when a first voltage according to a power supply voltage is higher than a first threshold and outputting a second signal when the first voltage is lower than the first threshold during power-on and power-down. The power-down detection circuit outputs a third signal when a second voltage according to the power supply voltage becomes lower than a second threshold after the second signal is outputted during power-down. The output circuit outputs a power-on reset signal which changes from low to high when the first signal is outputted during power-on and outputs a power-down reset signal which changes from low to high when the third signal is outputted during power-down.
    • 复位电路包括电源检测电路,掉电检测电路和输出电路。 当电源电压的第一电压高于第一阈值时,电源检测电路输出第一信号,并且在上电和掉电期间当第一电压低于第一阈值时输出第二信号。 当在掉电期间输出第二信号之后,当根据电源电压的第二电压变得低于第二阈值时,掉电检测电路输出第三信号。 输出电路在上电时输出第一个信号时,输出从低电平变为高电平的上电复位信号,并在断电时输出第三个信号输出时从低电平变为高电平的掉电复位信号 。