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    • 2. 发明授权
    • Semiconductor memory device and trimming method thereof
    • 半导体存储器件及其修整方法
    • US08018757B2
    • 2011-09-13
    • US12539883
    • 2009-08-12
    • Atsushi KawasumiYukihiro Urakawa
    • Atsushi KawasumiYukihiro Urakawa
    • G11C11/00
    • G11C7/02G11C5/147G11C11/41G11C11/413G11C11/417G11C29/02G11C29/021G11C29/026G11C29/028G11C29/50G11C2207/2254
    • The first power supply terminal is connected to source electrodes of the first and third transistors. The second power supply terminal is connected to source electrodes of the second and fourth transistors. When offset information of the memory cell is to be read, a voltage applied to the first power supply terminal and a voltage applied to the second power supply terminal are made equal. Then the voltage applied to the first power supply terminal is returned to the first potential, and the voltage applied to the second power supply terminal is returned to the second potential. When stress is generated in the first to fourth transistor included in the first or second inverter, the potential difference between the first power supply terminal and the second power supply terminal is made larger than a difference between the first potential and the second potential.
    • 第一电源端子连接到第一和第三晶体管的源电极。 第二电源端子连接到第二和第四晶体管的源电极。 当要读取存储器单元的偏移信息时,施加到第一电源端子的电压和施加到第二电源端子的电压相等。 然后,施加到第一电源端子的电压返回到第一电位,并且施加到第二电源端子的电压返回到第二电位。 当在包括在第一或第二逆变器中的第一至第四晶体管中产生应力时,使得第一电源端子和第二电源端子之间的电位差大于第一电位和第二电位之间的差。
    • 10. 发明授权
    • Semiconductor memory device having refresh circuits
    • 具有刷新电路的半导体存储器件
    • US5517454A
    • 1996-05-14
    • US355762
    • 1994-12-14
    • Katsuhiko SatoKiyofumi OchiiYukihiro Urakawa
    • Katsuhiko SatoKiyofumi OchiiYukihiro Urakawa
    • G11C11/405G11C11/403G11C11/406G11C11/409G11C7/00
    • G11C11/406
    • A semiconductor memory device including dynamic memory cells for which refresh operation is required, wherein one fundamental cycle consists of a normal operation for carrying out writing or reading into or from the memory cells and a refresh operation. This semiconductor memory device comprising: a refresh signal generating circuit supplied with a clock signal to generate a refresh signal indicating start of refresh; a count signal generating circuit supplied with the clock signal to generate a count signal required for selection of a memory cell to be refreshed, a refresh counter circuit supplied with the refresh signal and the count signal to select a word line and a bit line to which a memory cell to be refreshed is connected; and a precharge circuit supplied with the refresh signal to carry out precharge of the bit line for refresh.
    • 一种包括需要刷新操作的动态存储器单元的半导体存储器件,其中一个基本周期包括用于执行对存储器单元的写入或读取的正常操作和刷新操作。 该半导体存储器件包括:刷新信号发生电路,被提供有时钟信号以产生指示刷新开始的刷新信号; 提供有时钟信号的计数信号发生电路,以产生选择要刷新的存储单元所需的计数信号,提供有刷新信号的刷新计数器电路和计数信号以选择字线和位线 连接要更新的存储单元; 以及提供有刷新信号的预充电电路,以执行用于刷新的位线的预充电。