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    • 5. 发明授权
    • Method for operating a ferroelectric of electret memory device, and a device of this kind
    • 操作驻极体存储装置的铁电体的方法以及这种装置
    • US06937500B2
    • 2005-08-30
    • US10659428
    • 2003-09-11
    • Hans Gude GudesenPer-Erik NordalGeirr I. LeistadPer BrömsPer SandströmMats Johansson
    • Hans Gude GudesenPer-Erik NordalGeirr I. LeistadPer BrömsPer SandströmMats Johansson
    • G11C11/22
    • G11C11/22
    • A matrix-addressable ferroelectric or electret memory device and a method of operating are explained. The method includes applying a first plurality of voltage difference across a first and a second set of electrodes in the memory when data are read, and applying a second plurality of voltage differences when data are refreshed or rewritten. The first and second plurality of voltage differences correspond to sets of potential levels comprising time sequences of voltage pulses. At least one parameter indicative of a change in a memory cell response is used for determining at least one correction factor for the voltage pulses, whereby the pulse parameter is adjusted accordingly. The memory device comprises means for determining the at least one parameter, a calibration memory connected with means for determining the correction factor, and control circuits for adjusting pulse parameters as applied to read and write operations in the memory device.
    • 说明矩阵寻址铁电或驻极体存储器件及其操作方法。 该方法包括当读取数据时在存储器中的第一和第二组电极上施加第一多个电压差,以及当刷新或重写数据时施加第二多个电压差。 第一和第二多个电压差对应于包括电压脉冲的时间序列的电位电平集合。 指示存储器单元响应的变化的至少一个参数用于确定电压脉冲的至少一个校正因子,从而相应地调整脉冲参数。 存储器件包括用于确定至少一个参数的装置,与用于确定校正因子的装置连接的校准存储器以及用于调整应用于存储器件中的读和写操作的脉冲参数的控制电路。