Constant sensing current for reading resistive memory
US9502088B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 2014 |
| Grant date | Nov 22, 2016 |
| Priority date | — |
| Expiry date | Sep 27, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2013/0054
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods relate to providing a constant sensing current for reading a resistive memory element. A load voltage generator provides a load voltage based on a current mirror configured to supply a constant current that is invariant with process-voltage-temperature variations. A data voltage is generated based on the generated load voltage, by passing a sensing current mirrored from the constant current, through the resistive memory element. A reference voltage is generated, also based on the generated load voltage and by passing reference current mirrored from the constant current, through reference cells. A logical value stored in the resistive memory element is determined based on a comparison of the data voltage and the reference voltage, where the determination is free from effects of process-voltage-temperature variations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.