Semiconductor memory device with improved read characteristics for data
having multi values
    43.
    发明授权
    Semiconductor memory device with improved read characteristics for data having multi values 失效
    具有改善的具有多值数据的读取特性的半导体存储器件

    公开(公告)号:US5982662A

    公开(公告)日:1999-11-09

    申请号:US920366

    申请日:1997-08-29

    摘要: A semiconductor memory device is described that has an improved read characteristics. The semiconductor memory device includes a plurality of memory cells, a reference cell, a comparator located between the memory cells and the reference cell, and a discriminator coupled to the comparator. The comparator compares the actual signal equivalent to a value of a current flowing in each of the memory cells and reference signals equivalent to a value of a current flowing in the reference cell with each other to output a comparison result signal in each of data reading operation modes. The discriminator discriminates a value of data stored in each of the memory cells based on the comparison result signal. The discriminator includes a circuit shared for discrimination of a data value in each of the data reading operation modes.

    摘要翻译: 描述了具有改进的读取特性的半导体存储器件。 半导体存储器件包括多个存储器单元,参考单元,位于存储器单元和参考单元之间的比较器,以及耦合到比较器的鉴相器。 比较器将在每个存储单元中流动的电流的值等效的参考信号与参考单元中流动的电流的值相当的实际信号进行比较,以在每个数据读取操作中输出比较结果信号 模式。 鉴别器基于比较结果信号来识别存储在每个存储器单元中的数据的值。 鉴别器包括在每个数据读取操作模式中用于区分数据值的共享电路。