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    • 2. 发明授权
    • Bypass circuit for word line cell discharge current
    • 用于字线电池放电电流的旁路电路
    • US4488263A
    • 1984-12-11
    • US363198
    • 1982-03-29
    • William H. HerndonJonathan J. Stinehelfer
    • William H. HerndonJonathan J. Stinehelfer
    • G11C11/414G11C11/415G11C11/40
    • G11C11/415
    • A current bypass for a microelectric memory, such as a static RAM, diverts word line discharge current such that the current does not flow through the memory cells of a selected word line or along an upper word line conductor. In a first embodiment, the bypass comprises a resistor R1 (R2) and a diode D10 (D20) in series and coupled between an upper word line conductor 50 and word line discharge current source V.sub.CC, and a lower word line conductor 51 and word line discharge current sink 42. In another embodiment of the invention, a transistor Q10 (Q20) is used in lieu of the diode. By bypassing current from the upper word line conductor and word line memory cells, metal migration is eliminated and narrower metal lines may be used to form the word lines. By eliminating a flow of steady state discharge current through the memory cells, memory cell current saturation is eliminated.
    • 用于诸如静态RAM的微电存储器的电流旁路转移字线放电电流,使得电流不流过选定字线或沿着上字线导体的存储器单元。 在第一实施例中,旁路包括串联的电阻器R1(R2)和二极管D10(D20),并耦合在上字线导体50和字线放电电流源VCC之间,并且下字线导体51和字线 放电电流阱42.在本发明的另一个实施例中,使用晶体管Q10(Q20)代替二极管。 通过绕过上部字线导体和字线存储器单元的电流,消除了金属迁移,并且可以使用较窄的金属线来形成字线。 通过消除通过存储单元的稳态放电电流的流动,消除了存储单元电流饱和。