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US 8,264,886 B2Granted
Delayed activation of selected wordlines in memory
AssigneeMicron Technology, Inc.
InventorsXiaojun Yu, Jin-man Han
Life of this patent
Estimating the term…
Abstract
Apparatus, systems, and methods may operate to receive an external read command at a control circuit coupled to a memory array. Individual wordline activation may be delayed according to a delay period determined by a read level voltage magnitude associated with a plurality of memory cells included in the array.
Claims13
An apparatus, comprising:
- a plurality of memory cells to couple to a word line responsive to an external read command;
- and
- a delay circuit including a counter, the delay circuit operable to activate the wordline with a delay period determined according to a read level voltage magnitude associated with the plurality of memory cells, and operable to determine a delay period count.
An apparatus, comprising:
- a plurality of memory cells to couple to a word line responsive to an external read command;
- and
- a delay circuit including a table, the delay circuit operable to activate the wordline with a delay period determined according to a read level voltage magnitude associated with the plurality of memory cells, and operable to determine a delay period count based upon values stored in the table.
A method of sensing in a memory device, comprising:
- driving a control gate of an unselected memory cell to a first voltage level;
- and
- driving the control gate of a selected memory cell to a second voltage level after a delay period, wherein driving the control gate of a selected memory cell to a second voltage level after a delay period comprises selecting the delay period based upon counting up to one of three values after a read operation begins.
A method of sensing in a memory device, comprising:
- driving a control gate of an unselected memory cell to a first voltage level;
- and
- driving the control gate of a selected memory cell to a second voltage level after a delay period, wherein driving the control gate of a selected memory cell to a second voltage level after a delay period comprises selecting the delay period based upon a table having entries referenced to the second voltage level.
Dependencies are inferred from the claim text.