Shifting reference values to account for voltage sag
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United States of America Patent
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Jul 5, 2011
Grant Date -
Jan 28, 2010
app pub date -
Sep 30, 2009
filing date -
May 15, 2006
priority date (Note) -
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Abstract
A system and method, including software implemented techniques, can be used to adjust for sag in stored data values. Charge is applied to multiple memory cells, and each memory cell is charged to a target voltage corresponding to a data value. The memory cells include a reference cell that is charged to a predetermined voltage. A voltage level in the reference cell is detected, and voltage levels from a group of memory cells are also detected. An adjustment is performed based upon the difference between the detected voltage level in the reference cell and the predetermined voltage.
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