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    • 9. 发明授权
    • Semiconductor random access memory device having shared sense amplifiers
serving as a cache memory
    • 具有用作高速缓冲存储器的共享读出放大器的半导体随机存取存储器件
    • US5301162A
    • 1994-04-05
    • US35238
    • 1993-03-23
    • Tamio Shimizu
    • Tamio Shimizu
    • G11C11/409G06F12/08G11C7/06G11C8/12G11C11/401G11C15/04
    • G11C8/12G06F12/0893G11C7/06
    • A random access memory device has memory cell blocks, row address decoders respectively associated with the memory cell blocks, sense amplifier circuit arrays each shared between two of the memory cell blocks, and a column selecting unit for transferring a data bit from one of the sense amplifier circuit arrays to an output data buffer circuit, a flag generating unit for producing flag signals indicative of memory cell blocks supplying the data bits presently stored in the sense amplifier circuit arrays, and an address discriminating unit operative to examine block and row addresses supplied from the outside thereof to see whether or not an accessed data bit has been already stored in the sense amplifier circuit arrays, thereby allowing the shared sense amplifier circuit arrays to serve as a cache memory.
    • 随机存取存储器件具有存储单元块,分别与存储单元块相关联的行地址解码器,在两个存储单元块之间共享的读出放大器电路阵列和用于从该感测中的一个传送数据位的列选择单元 放大器电路阵列到输出数据缓冲器电路,标志产生单元,用于产生指示提供当前存储在读出放大器电路阵列中的数据位的存储单元块的标志信号;以及地址鉴别单元,用于检查从 在外部,以查看访问数据位是否已经存储在读出放大器电路阵列中,从而允许共享读出放大器电路阵列用作高速缓冲存储器。