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US 12,608,137 B2Granted
Redundancy for an array of non-volatile memory cells using tag registers
AssigneeSilicon Storage Technology, Inc.
InventorsHieu Van Tran, Thuan Vu, Kha Nguyen, Stephen Trinh, Stanley Hong, Hien Pham
Life of this patent
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Abstract
Numerous examples are disclosed of systems and methods to implement redundancy. In one example, a system comprises an array of non-volatile memory cells; a redundant array of non-volatile memory cells; and an input block coupled to respective rows in the array and respective rows in the redundant array and comprising row tag registers and redundant row tag registers.
Claims4
A system comprising:
- an array of non-volatile memory cells arranged into rows and columns;
- a redundant array of non-volatile memory cells arranged into rows and columns;
- and
- an input block coupled to respective rows in the array and respective rows in the redundant array and comprising for each of the respective rows in the array:
- a row register configured to store and output a digital value;
- a row tag register configured to store a value and output an enable signal in response to the value;
- a digital-to-analog converter configured to receive the digital value from the row register and to apply an analog signal to a row of the array if the enable signal from the row tag register is a first value and to not apply an analog signal to the row of the array if the enable signal from the row tag register is a second value;
- wherein the input block comprises for each of the rows in the redundant array:
- a redundant row register configured to store and output a digital value;
- a redundant row tag register configured to store a value and output an enable signal in response to the value;
- and
- a redundant digital-to-analog converter configured to receive the digital value from the redundant row register and to apply an analog signal to a row of the redundant array if the enable signal from the redundant row tag register is a third value and to not apply an analog signal to the row of the redundant array if the enable signal from the row tag register is a fourth value.
9 more elements
Dependencies are inferred from the claim text.