Semiconductor memory device and method for operating the same
AssigneeSK hynix Inc.
InventorHeon Jin CHOO
Life of this patent
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Abstract
A semiconductor memory device includes a memory cell array, a peripheral circuit, and a control logic. The memory cell array includes a plurality of memory blocks. The peripheral circuit performs a read operation on a selected memory block among the plurality of memory blocks. The control logic controls the read operation of the peripheral circuit. The selected memory block is coupled to a plurality of bit lines, and the plurality of bit lines are grouped into a plurality of bit line groups. The peripheral circuit performs data sensing by applying different reference currents to the plurality of bit line groups, respectively.
Claims10
A method for operating a semiconductor memory device, the method comprising:
- receiving a read command;
- performing a sensing operation on a plurality of memory cells, using a set of reference currents;
- determining whether a read operation has succeeded, as a result of the sensing operation;
- and
- changing the set of reference currents, based on the determined result.
A method for operating a semiconductor memory device, the method comprising:
- receiving a read command;
- performing a sensing operation on memory cells of a selected page, using a first reference current and a second reference current different from the first reference current;
- determining a third read voltage, based on a first sensing result using the first reference current and a second sensing result using the second reference current;
- and
- performing the sensing operation on the memory cells, based on the third read voltage.
Dependencies are inferred from the claim text.