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    • 9. 发明申请
    • SELF REFERENCING SENSE AMPLIFIER FOR SPIN TORQUE MRAM
    • 自适应感应放大器用于旋转扭矩MRAM
    • WO2013169593A2
    • 2013-11-14
    • PCT/US2013/039466
    • 2013-05-03
    • SUBRAMANIAN, ChitraALAM, Syed M.EVERSPIN TECHNOLOGIES, INC.
    • SUBRAMANIAN, ChitraALAM, Syed M.
    • G11C11/16
    • G11C11/1673
    • Circuitry and a method provide self-referenced sensing of a resistive memory cell by using its characteristic of resistance variation with applied voltage in one state versus a relatively constant resistance regardless of the applied voltage in its opposite state. Based on an initial bias state with equalized resistances, a current comparison at a second bias state between a mock bit line and a bit line is used to determine the state of the memory cell, since a significant difference in current implies that the memory cell state has a significant voltage coefficient of resistance. An offset current applied to the mock bit line optionally may be used to provide symmetry and greater sensing margin.
    • 电路和方法通过使用其在一个状态下的施加电压与相对恒定电阻的电阻变化的特性来提供电阻性存储单元的自参考感测,而不管其相反状态下的施加电压如何。 基于具有均衡电阻的初始偏置状态,使用模拟位线和位线之间的第二偏置状态下的电流比较来确定存储器单元的状态,因为电流的显着差异意味着存储单元状态 具有显着的电阻系数。 施加到模拟位线的偏移电流可选地可以用于提供对称性和更大的感测余量。