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    • 7. 发明授权
    • Semiconductor memory device
    • 半导体存储器件
    • US5436870A
    • 1995-07-25
    • US283177
    • 1994-08-03
    • Katsuyuki SatoMiki MatsumotoSadayuki OhkumaMasahiro OgataMasahiro Yoshida
    • Katsuyuki SatoMiki MatsumotoSadayuki OhkumaMasahiro OgataMasahiro Yoshida
    • G11C29/00G11C7/10G11C7/18G11C8/10G11C11/401G11C29/04G11C11/40G11C13/00
    • G11C7/18G11C7/1075G11C8/10
    • A multiport memory is provided which permits both random access and serial access. In order to reduce parasitic capacitance and improve operating speed, the serial input/output lines are each divided into two parts at their middle points. Sense amplifiers for the serial input/output lines are provided at upper and lower ends of the serial access memory elements to respectively amplify signals from the divided lines. Additional features are provided for improving both the serial and random operation. For example, during the serial read mode, the column selector for random access is simultaneously operated, and read data passing through the random access column selector is used as head data for the serial output operation to be delivered through the serial output circuit. Also, a serial selector can be controlled by a select signal formed by a Gray Code counter to improve operating speed. Further features included a redundancy system for relief of defective bits, the use of common bit lines to improve integration density and an improved refreshing arrangement to reduce power consumption during the refresh mode.
    • 提供多端口存储器,允许随机访问和串行访问。 为了减少寄生电容并提高工作速度,串行输入/输出线在其中间点分为两部分。 用于串行输入/输出线的读出放大器设置在串行存取存储器元件的上端和下端,以分别放大来自分割线的信号。 提供了另外的功能来改进串行和随机操作。 例如,在串行读取模式期间,用于随机存取的列选择器被同时操作,并且通过随机存取列选择器的读数据被用作通过串行输出电路传送的串行输出操作的头数据。 此外,串行选择器可以由格雷码计数器形成的选择信号控制,以提高操作速度。 其他特征包括用于缓解缺陷位的冗余系统,使用公共位线来提高集成密度以及改进的刷新布置以减少刷新模式期间的功耗。
    • 8. 发明授权
    • Semiconductor memory device
    • 半导体存储器件
    • US5115413A
    • 1992-05-19
    • US496258
    • 1990-03-20
    • Katsuyuki SatoMiki MatsumotoSadayuki OhkumaMasahiro OgataMasahiro Yoshida
    • Katsuyuki SatoMiki MatsumotoSadayuki OhkumaMasahiro OgataMasahiro Yoshida
    • G11C29/00G11C7/10G11C7/18G11C8/10G11C11/401G11C29/04
    • G11C7/18G11C7/1075G11C8/10
    • A multiport memory is provided which permits both random access and serial access. In order to reduce parasitic capacitance and improve operating speed, the serial input/output lines are each divided into two parts at their middle points. Sense amplifiers for the serial input/output lines are provided at upper and lower ends of the serial access memory elements to respectively amplify signals from the divided lines. Additional features are provided for improving both the serial and random operation. For example, during the serial read mode, the column selector for random access is simultaneously operated, and read data passing through the random access column selector is used as head data for the serial output operation to be delivered through the serial output circuit. Also, a serial selector can be controlled by a select signal formed by a Gray Code counter to improve operating speed. Further features include a redundancy system for relief of defective bits, the use of common bit lines to improve integration density and an improved refreshing arrangement to reduce power consumption during the refresh mode.
    • 提供多端口存储器,允许随机访问和串行访问。 为了减少寄生电容并提高工作速度,串行输入/输出线在其中间点分为两部分。 用于串行输入/输出线的读出放大器设置在串行存取存储器元件的上端和下端,以分别放大来自分割线的信号。 提供了另外的功能来改进串行和随机操作。 例如,在串行读取模式期间,用于随机存取的列选择器被同时操作,并且通过随机存取列选择器的读数据被用作通过串行输出电路传送的串行输出操作的头数据。 此外,串行选择器可以由格雷码计数器形成的选择信号控制,以提高操作速度。 其他特征包括用于缓解缺陷位的冗余系统,使用公共位线来提高集成密度,以及改进的刷新布置以减少刷新模式期间的功耗。