Method and system of finding a read voltage for a flash memory
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United States of America Patent
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Dec 6, 2011
Grant Date -
Feb 24, 2011
app pub date -
Aug 18, 2009
filing date -
Aug 18, 2009
priority date (Note) -
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Abstract
A method and system of finding a read voltage for a flash memory is disclosed. Data are read from array cells of the flash memory with a default read voltage, and a recorded state bit number that is recorded during programming is also read. Determine an optimal read voltage if the readout data do not pass the error correction control (ECC). Data are then re-read from the array cells of the flash memory with the determined optimal read voltage.
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