Patent ID: 8792281
Filing Date: 2014-07-29
Classification: G11C

Abstract:
1. A method, comprising: dividing a group of analog memory cells into multiple subsets; sensing the memory cells in the group simultaneously by performing a single sense operation, while applying to the subsets of the memory cells respective different sets of read thresholds, so as to produce respective readout results; and estimating an optimal set of the read thresholds by processing the multiple readout results obtained from the respective subsets using the different sets of the read thresholds; wherein estimating the optimal set of the read thresholds comprises assessing respective quality levels of the different sets of read thresholds based on the corresponding readout results, and deriving the optimal set of read thresholds from the quality levels wherein the multiple subsets of the memory cells store respective separate Error Correction Code (ECC) code words, and wherein assessing the quality levels comprises assessing respective metrics relating to the respective ECC code words.