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US 8,943,386 B1Granted
Generating soft read values which optimize dynamic range
AssigneeSK hynix memory solutions inc.
InventorsFrederick K. H. Lee, Jason Bellorado, Marcus Marrow
Life of this patent
Estimating the term…
Abstract
Bin identification information for a cell is generated. An estimation function is received where the estimation function trends toward a maximum soft read value at a first end and trends toward a minimum soft read value at a second end. A soft read value is determined for the cell based at least in part on the bin identification information and the estimation function.
Claims21
A system, comprising:
- a bin mapper configured to generate bin identification information for a cell;
- and
- a soft information generator configured to:
- receive the bin identification information;
- receive an estimation function, wherein the estimation function trends toward a maximum soft read value at a first end and trends toward a minimum soft read value at a second end;
- and
- determine a soft read value for the cell based at least in part on the bin identification information and the estimation function, wherein the soft information generator is configured to use a same estimation function independent of a number of program erase cycles (PEC).
4 more elements
A system, comprising:
- a bin mapper configured to generate bin identification information for a cell, wherein the bin identification information includes a left bin edge and a right bin edge;
- and
- a soft information generator configured to:
- receive the bin identification information;
- receive an estimation function, wherein the estimation function trends toward a maximum soft read value at a first end and trends toward a minimum soft read value at a second end;
- and
- determine a soft read value for the cell based at least in part on the bin identification information and the estimation function, wherein:
- the left bin edge and the right bin edge are offsets with respect to an optimal read threshold estimate;
- and
- the bin mapper is further configured to:
- set the left bin edge to be a difference between a first read threshold and the optimal read threshold estimate;
- and
- set the right bin edge to be a difference between a second read threshold and the optimal read threshold estimate.
10 more elements
A system, comprising:
- a bin mapper configured to generate bin identification information for a cell;
- and
- a soft information generator configured to:
- receive the bin identification information;
- receive an estimation function, wherein the estimation function trends toward a maximum soft read value at a first end and trends toward a minimum soft read value at a second end;
- and
- determine a soft read value for the cell based at least in part on the bin identification information and the estimation function, wherein the soft information generator is configured to use a same estimation function independent of retention time associated with stored data.
4 more elements
A method, comprising:
- generating bin identification information for a cell;
- receiving an estimation function, wherein the estimation function trends toward a maximum soft read value at a first end and trends toward a minimum soft read value at a second end;
- and
- using a soft information generator to determine a soft read value for the cell based at least in part on the bin identification information and the estimation function, wherein using the soft information generator includes using a same estimation function independent of a number of program erase cycles (PEC).
1 more element
A method, comprising:
- generating bin identification information for a cell;
- receiving an estimation function, wherein the estimation function trends toward a maximum soft read value at a first end and trends toward a minimum soft read value at a second end;
- and
- using a soft information generator to determine a soft read value for the cell based at least in part on the bin identification information and the estimation function, wherein using the soft information generator includes using a same estimation function independent of retention time associated with stored data.
1 more element
A method, comprising:
- generating bin identification information for a cell, wherein the bin identification information includes a left bin edge and a right bin edge;
- receiving an estimation function, wherein the estimation function trends toward a maximum soft read value at a first end and trends toward a minimum soft read value at a second end;
- and
- using a soft information generator to determine a soft read value for the cell based at least in part on the bin identification information and the estimation function, wherein:
- the left bin edge and the right bin edge are offsets with respect to an optimal read threshold estimate;
- and
- the method further includes:
- setting the left bin edge to be a difference between a first read threshold and the optimal read threshold estimate;
- and
- setting the right bin edge to be a difference between a second read threshold and the optimal read threshold estimate.
7 more elements
A computer program product, the computer program product being embodied in a non-transitory computer readable storage medium and comprising computer instructions for:
- generating bin identification information for a cell;
- receiving an estimation function, wherein the estimation function trends toward a maximum soft read value at a first end and trends toward a minimum soft read value at a second end;
- and
- determining a soft read value for the cell based at least in part on the bin identification information and the estimation function, wherein determining the soft read value includes using a same estimation function independent of a number of program erase cycles (PEC).
1 more element
A computer program product, the computer program product being embodied in a non-transitory computer readable storage medium and comprising computer instructions for:
- generating bin identification information for a cell, wherein the bin identification information includes a left bin edge and a right bin edge;
- receiving an estimation function, wherein the estimation function trends toward a maximum soft read value at a first end and trends toward a minimum soft read value at a second end;
- and
- determining a soft read value for the cell based at least in part on the bin identification information and the estimation function, wherein:
- the left bin edge and the right bin edge are offsets with respect to an optimal read threshold estimate;
- and
- the computer program product further includes computer instructions for:
- setting the left bin edge to be a difference between a first read threshold and the optimal read threshold estimate;
- and
- setting the right bin edge to be a difference between a second read threshold and the optimal read threshold estimate.
7 more elements
A computer program product, the computer program product being embodied in a non-transitory computer readable storage medium and comprising computer instructions for:
- generating bin identification information for a cell;
- receiving an estimation function, wherein the estimation function trends toward a maximum soft read value at a first end and trends toward a minimum soft read value at a second end;
- and
- determining a soft read value for the cell based at least in part on the bin identification information and the estimation function, wherein determining the soft read value includes using a same estimation function independent of retention time associated with stored data.
1 more element
Dependencies are inferred from the claim text.