Ferroelectric memory device, method of driving the same, and driver circuit
    10.
    发明授权
    Ferroelectric memory device, method of driving the same, and driver circuit 失效
    铁电存储器件,其驱动方法和驱动电路

    公开(公告)号:US07142445B2

    公开(公告)日:2006-11-28

    申请号:US10932890

    申请日:2004-09-02

    CPC分类号: G11C11/22

    摘要: A ferroelectric memory device preventing an imprint and including a plurality of wordlines, a plurality of bitlines, a plurality of ferroelectric memory cells, a wordline driver which drives the wordlines, and a bitline driver which drives the bitlines. The wordline driver and the bitline driver switch an operation mode of the ferroelectric memory device to a first mode which is one of a data reading mode, a data rewriting mode and a data writing mode, by applying a voltage Vs having a first polarity to at least one ferroelectric memory cell selected from the ferroelectric memory cells. The wordline driver and the bitline driver switch the operation mode to a second mode in which the ferroelectric memory device prevents an imprint by applying a voltage (−Vs/3) having a second polarity which is the reverse of the first polarity to the selected ferroelectric memory cell, after the operation mode has been switched to the first mode at least once, the voltage of the second polarity causing no inversion of data stored in the ferroelectric memory cells.

    摘要翻译: 一种铁电存储器件,其防止压印并包括多个字线,多个位线,多个铁电存储器单元,驱动字线的字线驱动器和驱动位线的位线驱动器。 字线驱动器和位线驱动器通过将具有第一极性的电压Vs施加到第一模式,将铁电存储器件的操作模式切换到作为数据读取模式,数据重写模式和数据写入模式之一的第一模式 选自铁电存储单元的至少一个铁电存储单元。 字线驱动器和位线驱动器将操作模式切换到第二模式,其中铁电存储器件通过将与第一极性相反的具有第二极性的电压(-Vs / 3)施加到所选铁电体来防止压印 存储单元,在操作模式已经被切换到第一模式至少一次之后,第二极性的电压不会导致存储在铁电存储单元中的数据的反转。