Soft readout from analog memory cells in the presence of read threshold errors

Apparatus, comprising:

• an interface, which is configured to communicate with a memory that includes analog memory cells;
• and
• storage circuitry, which is configured to store data in a group of the memory cells by writing respective analog values into the memory cells in the group, to read the analog values from the memory cells in the group one or more times using one or more respective read thresholds so as to produce readout results, to compute, based on the readout results, reliability measures for the read analog values, to estimate, based on the reliability measures, an offset of the one or more read thresholds from an optimal read threshold position, to modify the reliability measures so as to compensate for the estimated offset, and to decode the data stored in the analog memory cells in the group using the corrected reliability measures.

Apparatus, comprising:

• a memory comprising analog memory cells;
• and
• storage circuitry, which is configured to store data in a group of the memory cells by writing respective analog values into the memory cells in the group, to read the analog values from the memory cells in the group one or more times using one or more respective read thresholds so as to produce readout results, to compute, based on the readout results, reliability measures for the read analog values, to estimate, based on the reliability measures, an offset of the one or more read thresholds from an optimal read threshold position, to modify the reliability measures so as to compensate for the estimated offset, and to decode the data stored in the analog memory cells in the group using the corrected reliability measures.