Patent ID: 8458563
Filing Date: 2013-06-04
Classification: G06F,G11C

Abstract:
1. A method of reading a plurality of memory cells, comprising: (a) assigning each cell to a respective one of a plurality of cell populations; (b) measuring a respective value of an operational parameter of each cell; (c) providing a value of at least one first respective cell distribution model parameter of each population; (d) assigning each cell a respective a priori metric, based at least in part on the respective at least one cell distribution model parameter value of the cell's respective population; (e) decoding the a priori metrics, thereby providing, for each cell, a respective a posteriori metric; and (f) based at least in part on the a posteriori metrics, and without repeating the measuring of the respective values of the operational parameters: estimating a value of at least one second respective cell distribution model parameter of each population.