System and method for adjusting read voltage thresholds in memories
AssigneeDensbits Technologies Ltd.
InventorsHanan Weingarten, Erez Sabbag, Michael Katz
Life of this patent
Estimating the term…
Abstract
A system and method for adjusting read threshold voltage values, for example, in a read circuit internal to a memory device. The quality of an associated read result may be estimated for each read threshold voltage value used to read memory cells. Only read results estimated to have sufficient quality may be allowed to pass to storage. The read threshold voltage value may be adjusted for subsequent read operations, for example, if the associated read result is estimated to have insufficient quality. The read threshold voltage value may be iteratively adjusted, for example, until a read result is estimated to have sufficient quality.
Claims42
A method for adjusting read threshold voltage values, comprising:
- estimating, by a processor of a read circuit of a memory device that comprises memory cells, a quality of a read result;
- allowing only read results estimated to have sufficient quality to pass from sense amplifiers of the read circuit to be stored in latches of the memory device and then to be provided to an external controller coupled to the memory device;
- and adjusting a read threshold voltage value for subsequent read operations if the read result is estimated to have insufficient quality.
A system for adjusting read threshold voltage values, comprising:
- a memory device comprising memory cells;
- and an read circuit internal to the memory device, wherein for each read threshold voltage value used to read memory cells, a processor of the read circuit estimates a quality of a read result, allows only read results estimated to have sufficient quality to pass from sense amplifiers of the read circuit to be stored in latches of the memory device and then to be provided to an external controller coupled to the memory device, and adjusts the read threshold voltage value for subsequent read operations if the associated read result is estimated to have insufficient quality.
Dependencies are inferred from the claim text.