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    • 2. 发明授权
    • Semiconductor memory device equipped with step-down power voltage supply
system for sense amplifier circuit arrays
    • 半导体存储器件配备有用于读出放大器电路阵列的降压电源电压系统
    • US5272677A
    • 1993-12-21
    • US958795
    • 1992-10-09
    • Ryuji Yamamura
    • Ryuji Yamamura
    • G11C11/419G11C11/401G11C11/407G11C11/409G11C11/4091G11C11/413G11C7/00
    • G11C11/4091
    • A dynamic random access memory device includes a plurality of memory cell plates each having memory cells and a sense amplifier circuit array selectively coupled with the memory cells, and the sense amplifier circuit array selectively enters a standby mode and amplifying mode depending upon first and second driving signals supplied thereto, wherein the first and second driving signals are regulated to an intermediate voltage level between a step-down power voltage level and a ground voltage level in the standby mode with a main step-down power voltage signal supplied from a main step-down circuit; however, the first and second driving signals are changed to the step-down voltage level and the ground voltage level with an auxiliary step-down power voltage signal produced from an external power voltage signal at an auxiliary step-down circuit exclusively associated therewith so that undesirable voltage fluctuation hardly takes place on a main step-down power voltage line.
    • 动态随机存取存储器件包括多个存储单元板,每个存储单元板具有存储单元和与存储单元选择性耦合的读出放大器电路阵列,并且读出放大器电路阵列根据第一和第二驱动选择性地进入待机模式和放大模式 提供给其的信号,其中第一和第二驱动信号通过从主步进电源提供的主降压电源电压信号在待机模式下被调节到降压功率电压电平和接地电压电平之间的中间电压电平, 下电路 然而,第一和第二驱动信号由辅助降压电路产生的辅助降压功率电压信号改变为降压电压和接地电压电平,该辅助降压电压信号在与其完全相关的辅助降压电路处产生,使得 在主降压电源线上几乎不发生不期望的电压波动。
    • 6. 发明授权
    • Method and apparatus for correcting code errors
    • 纠正代码错误的方法和装置
    • US5831999A
    • 1998-11-03
    • US814573
    • 1997-03-10
    • Ryuji Yamamura
    • Ryuji Yamamura
    • G11B20/18H03M13/00H03M13/15H04L1/00H03M13/22
    • H03M13/151G11B20/1813
    • Disclosed is method of correcting code errors included in digital data that are structured in unit of frames, using first and second series of parity data. The method includes computing a first group of syndromes for the digital data using the first series of parity data. Then, a number of code errors included in the digital data is primarily decided based on the first group of syndromes, and the number of code errors included in the digital data is monitored in a frame by frame manner. In addition, the method includes primarily correcting at least one code error using the first group of syndromes and affixing an error flag to the digital data based on a result of monitoring the number of code errors. Then, a second group of syndromes for the digital data is generated using the second series of parity data. The method further includes secondarily deciding a number of code errors included in the digital data based on the second group of syndromes and the error flag, and further secondarily correcting at least one code error using the second group of syndromes.
    • 公开了使用第一和第二系列奇偶校验数据校正以帧为单位构成的数字数据中包含的码错误的方法。 该方法包括使用第一系列奇偶校验数据来计算用于数字数据的第一组综合征。 然后,主要基于第一组校正子来确定数字数据中包含的多个代码错误,并且逐帧地监视包含在数字数据中的代码错误的数量。 此外,该方法包括基于监视代码错误数量的结果,主要使用第一组综合征校正至少一个代码错误,并将错误标志附加到数字数据。 然后,使用第二系列奇偶校验数据生成用于数字数据的第二组综合征。 该方法还包括基于第二组综合征和错误标志来二次确定包括在数字数据中的代码错误的数量,并且进一步使用第二组校正子来校正至少一个代码错误。