Tracking cells for a memory system

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United States of America Patent

PATENT NO 7237074
APP PUB NO 20040255090A1
SERIAL NO

10461244

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Abstract

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Tracking cells are used in a memory system to improve the read process. The tracking cells can provide an indication of the quality of the data and can be used as part of a data recovery operation if there is an error. The tracking cells provide a means to adjust the read parameters to optimum levels in order to reflect the current conditions of the memory system. Additionally, some memory systems that use multi-state memory cells will apply rotation data schemes to minimize wear. The rotation scheme can be encoded in the tracking cells based on the states of multiple tracking cells, which is decoded upon reading.

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Patent Owner(s)

Patent OwnerAddress
SANDISK TECHNOLOGIES LLC6900 DALLAS PARKWAY SUITE 325 PLANO TX 75024

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gongwer, Geoffrey S Los Altos, CA 41 2169
Gross, Stephen J Cupertino, CA 16 1716
Guterman, Daniel C Fremont, CA 166 13852
Khalid, Shahzad Union City, CA 22 1373

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