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    • 27. 发明授权
    • Semiconductor memory device
    • 半导体存储器件
    • US5917745A
    • 1999-06-29
    • US40365
    • 1998-03-18
    • Yasuhiro Fujii
    • Yasuhiro Fujii
    • G11C11/401G11C7/18G11C11/4097G11C5/06
    • G11C11/4097G11C7/18
    • A semiconductor memory device according to this invention has a hierarchical bit line structure where a plurality of local bit lines are provided in parallel to each global bit line and some of the local bit lines in the column direction are connected to the global bit line. Such memory device further has an open bit line structure where global bit lines are provided on both sides of sense amplifiers, and has bit-line transfer circuits, provided between the global bit lines and the sense amplifiers, for isolating the global bit lines from the sense amplifiers when the sense amplifiers are activated. The use of the hierarchical bit line structure in combination with the open bit line structure enhances the layout efficiency of memory cells, and the provision of the bit-line transfer circuits overcomes a problem of erroneous data reading which would otherwise be caused by bit line noise inherent to the open bit line structure.
    • 根据本发明的半导体存储器件具有分层位线结构,其中与每个全局位线并联提供多个局部位线,并且列方向上的一些局部位线连接到全局位线。 这种存储器件还具有开放位线结构,其中全局位线设置在读出放大器的两侧,并且具有设置在全局位线和读出放大器之间的位线传输电路,用于将全局位线与 读出放大器激活时的读出放大器。 结合开放位线结构使用分层位线结构增强了存储器单元的布局效率,并且提供位线传输电路克服了否则将由位线噪声引起的错误数据读取的问题 开放位线结构固有的。