Flash memory devices having multi-bit memory cells therein with improved read reliability
    15.
    发明授权
    Flash memory devices having multi-bit memory cells therein with improved read reliability 有权
    其中具有多位存储单元的闪存器件具有改进的可读性

    公开(公告)号:US09224489B2

    公开(公告)日:2015-12-29

    申请号:US13920630

    申请日:2013-06-18

    CPC classification number: G11C16/26 G11C11/5642 G11C16/0483 G11C16/3418

    Abstract: Integrated circuit memory devices include an array of nonvolatile N-bit memory cells, where N is an integer greater than one. Control circuitry is also provided to reliably read data from the N-bit memory cells. This control circuitry, which is electrically coupled to the array, is configured to determine, among other things, a value of at least one bit of data stored in a selected N-bit memory cell in the array. This is done by decoding at least one hard data value and a plurality of soft data values (e.g., 6 data values) read from the selected N-bit memory cell using a corresponding plurality of unequal read voltages applied to the selected N-bit memory cell during a read operation.

    Abstract translation: 集成电路存储器件包括非易失性N位存储器单元的阵列,其中N是大于1的整数。 还提供控制电路以可靠地从N位存储器单元读取数据。 电耦合到阵列的该控制电路被配置为确定存储在阵列中的所选N位存储器单元中的至少一位数据的值。 这是通过使用施加到所选择的N位存储器的对应的多个不等的读取电压来解码从所选择的N位存储器单元读取的至少一个硬数据值和多个软数据值(例如,6个数据值)来完成的 在读操作期间。

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