Patent ID: 11972791
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. The method of claim 7, wherein obtaining the cell counts includes:
applying a read voltage having the reference read voltage level for the first state to a wordline connected to the plurality of memory cells;
counting first on-cells having threshold voltages lower than or equal to the first count voltage level by performing a sensing node latch operation at a previous time point before a reference time point;
counting second on-cells having threshold voltages lower than or equal to the second count voltage level by performing the sensing node latch operation at the reference time point;
counting third on-cells having threshold voltages lower than or equal to the third count voltage level by performing the sensing node latch operation at a subsequent time point after the reference time point;
calculating the first cell count by subtracting a number of the first on-cells from a number of the second on-cells; and
calculating the second cell count by subtracting the number of the second on-cells from a number of the third on-cells.