Detecting random telegraph noise defects in memory
AssigneeQUALCOMM Incorporated
InventorsSneha REVANKAR, Karthikeyan SUBRAMANIAN
Life of this patent
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Abstract
A method of detecting random telegraph noise defects in a memory includes initializing a first bit cell of the memory to a first value and reading the first value from the first bit cell. The method also includes writing a second value to the first bit cell and performing back to back read operations on a second bit cell adj acent to the first bit cell, after writing the second value. The method further includes attempting to read the second value from the first bit cell and determining whether the first bit cell is defective based on whether the second value was read from the first bit cell.
Claims21
A method of detecting random telegraph noise defects in a memory, comprising:
- initializing a first bit cell of the memory to a first value;
- reading the first value from the first bit cell;
- writing a second value to the first bit cell;
- performing back to back read operations on a second bit cell adjacent to the first bit cell, after writing the second value;
- attempting to read the second value from the first bit cell;
- and
- determining whether the first bit cell is defective based on whether the second value was read from the first bit cell.
An apparatus for detecting random telegraph noise defects in a memory, the apparatus comprising:
- the memory;
- and
- at least one processor coupled to the memory, the at least one processor configured:
- to initialize a first bit cell of the memory to a first value;
- to read the first value from the first bit cell;
- to write a second value to the first bit cell;
- to perform back to back read operations on a second bit cell adjacent to the first bit cell, after writing the second value;
- to attempt to read the second value from the first bit cell;
- and
- to determine whether the first bit cell is defective based on whether the second value was read from the first bit cell.
A non-transitory computer-readable medium having program code recorded thereon for detecting random telegraph noise defects in a memory, the program code executed by a processor and comprising:
- program code to initialize a first bit cell of the memory to a first value;
- program code to read the first value from the first bit cell;
- program code to write a second value to the first bit cell;
- program code to perform back to back read operations on a second bit cell adjacent to the first bit cell, after writing the second value;
- program code to attempt to read the second value from the first bit cell;
- and
- program code to determine whether the first bit cell is defective based on whether the second value was read from the first bit cell.
Dependencies are inferred from the claim text.