MEMORY DEVICE AND OPERATION METHOD THEREOF
    3.
    发明公开

    公开(公告)号:US20240339145A1

    公开(公告)日:2024-10-10

    申请号:US18422770

    申请日:2024-01-25

    CPC classification number: G11C11/40615 G11C11/40622 G11C11/4078

    Abstract: The present disclosure relates to operation methods of a memory device including multiple rows each including multiple memory cells. One example method includes receiving an active command for a first row from a memory controller, reading a first count from a per-row hammer tracking (PRHT) region of the first row, updating the first count to generate a first updated count, comparing the first updated count with one of first and second thresholds to generate a comparison result, wherein when the first row is adjacent to the given row, the first updated count is compared with the first threshold and when the first row is not adjacent to the given row, the first updated count is compared with the second threshold, outputting a target row address based on the comparison result, and performing a row hammer mitigation operation on a row corresponding to the target row address.

    Memory device performing refresh operation based on a random value and method of operating the same

    公开(公告)号:US11615829B1

    公开(公告)日:2023-03-28

    申请号:US17244261

    申请日:2021-04-29

    Abstract: A memory device includes a memory cell array, a random bit generator, a comparator and a refresh controller. The memory cell array includes a plurality of memory cells coupled to a plurality of word-lines. The random bit generator generates a random binary code having a predetermined number of bits. The comparator compares the random binary code and a reference binary code to output a matching signal based on a result of the comparison. The refresh controller refreshes target memory cells from among the plurality of memory cells based on addresses accessed by a memory controller during a sampling period randomly determined based on the matching signal and a refresh command from the memory controller.

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