Device of physically unclonable function with transistors, and manufacturing method
US11405223B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 6, 2020 |
| Grant date | Aug 2, 2022 |
| Priority date | — |
| Expiry date | Sep 25, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C16/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In accordance with an embodiment, a physically unclonable function device includes a set of transistor pairs, transistors of the set of transistor pairs having a randomly distributed effective threshold voltage belonging to a common random distribution; a differential read circuit configured to measure a threshold difference between the effective threshold voltages of transistors of transistor pairs of the set of transistor pairs, and to identify a transistor pair in which the measured threshold difference is smaller than a margin value as being an unreliable transistor pair; and a write circuit configured to shift the effective threshold voltage of a transistor of the unreliable transistor pair to be inside the common random distribution.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.