Read retry for non-volatile memories

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United States of America Patent

PATENT NO 9548128
APP PUB NO 20160093396A1
SERIAL NO

14961865

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Abstract

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An apparatus for reading a non-volatile memory includes a tracking module operable to calculate means and variances of voltage level distributions in a non-volatile memory and to calculate at least one reference voltage to be used when reading the non-volatile memory based on the means and variances, a likelihood generator operable to calculate at least one other reference voltage to be used when reading the non-volatile memory, wherein the at least one other reference voltage is based at least in part on a predetermined likelihood value constellation, and to map read patterns from the non-volatile memory to likelihood values, and a read controller operable to read the non-volatile memory using the at least one reference voltage and the at least one other reference voltage to yield the read patterns.

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Patent Owner(s)

  • SEAGATE TECHNOLOGY LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Alhussien, AbdelHakim S San Jose, US 69 843
Haratsch, Erich F San Jose, US 166 2892
Sankaranarayanan, Sundararajan Freemont, US 51 680
Wu, YingQuan Palo Alto, US 72 886

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