Patent ID: 7995388
Filing Date: 2011-08-09
Classification: G11C

Abstract:
1. A method for data storage, comprising: storing data in a target analog memory cell, which is one of a group of analog memory cells that are connected in series with one another, by writing an input storage value into the target memory cell; applying to the target memory cell a first read operation, which reads a first output storage value from the target memory cell while biasing the other memory cells in the group with respective first pass voltages; applying to the target memory cell a second read operation, which reads a second output storage value from the target memory cell while biasing the other memory cells in the group with respective second pass voltages, wherein at least one of the second pass voltages applied to one of the other memory cells in the group is different from a respective first pass voltage applied to the one of the other memory cells; making an assessment of whether the second output storage value has been distorted due to the at least one of the second pass voltages; and reconstructing the data responsively to the assessment and to the first and second output storage values.