US Patent 11656789 Asymmetric read sense
Patent 11656789 was granted and assigned to Western Digital on May, 2023 by the United States Patent and Trademark Office.
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US Patent 11656789 Asymmetric read sense
A data storage device includes a memory device including a plurality of wordlines, each including a plurality of cells, and a cell statistics generator (CSG) disposed on the memory device. The CSG includes logic configured to receive a first read sense at a threshold voltage of one or more threshold voltages of each cell of a wordline of the plurality of wordlines, determine that a second read sense is required based on the first read sense, receive the second read sense, determine a deviation parameter and a dispersion parameter for an asymmetric adjustment of the left threshold voltage and the right threshold voltage, and adjust the left threshold voltage and the right threshold voltage based on the deviation parameter and the dispersion parameter. The second read sense includes a plurality of left read senses at a left threshold voltage and a plurality of right senses at a right threshold voltage.
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