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    • 2. 发明专利
    • SEMICONDUCTOR STORAGE DEVICE
    • JPS60185290A
    • 1985-09-20
    • JP3037585
    • 1985-02-20
    • HITACHI LTDHITACHI MICROCUMPUTER ENG
    • MATSUMOTO KEIZOUKANEKO KENJIOKABE TAKAHIRO
    • G11C11/414G11C11/34
    • PURPOSE:To stabilize writing and to expand a writing range by making word line current at a selecting time and writing current proportional to the current amplification factor of information writing/reading TR in a semiconductor storage device using an I L element. CONSTITUTION:A memory Cell forming an FF consisting of the I L element including writing/reading N type TRs N8, N9 are connected to peripheral circuits consisting of N type TRs N1, N2, N3 and N5 respectively and to be used for cell current IW at a selecting time, word line current IW at a selecting time and writing current IW. The current amplification factor of the TRs N1, N2, N4, N5 is proportional to the current amplification factor hFE of the TRs N8, N9 and the current IW , IW , IW is proportional to the amplification factor hFE. Therefore, the current IW is made proportional to the IW and the writing operation range is increased. Since the current IW is also proportional to the IW , the word line W is prevented from the reduction of potential. Since the condition of IW>1/2hFEXIW is satisfied even if the amplification factor hFE is dispersed, stable writing is executed.