Physical unclonable functions related to inverter trip points
US10630493B2 · kind B2 · utility
1Cited by
4References
11Claims
0Family size
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Key dates
| Filing date | Nov 29, 2017 |
| Grant date | Apr 21, 2020 |
| Priority date | — |
| Expiry date | Jul 13, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/127
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A physical unclonable function (PUF) array includes a plurality of PUF transistor cells each of which includes at least one inverter. An input and an output of the at least one inverter are shorted to a first reference node. There is adjustment circuitry for adjusting a reference voltage of the first reference node, and measurement circuitry for measuring a trip point of the at least one inverter. If the trip point is close to the reference voltage then bits of the at least one inverter are defined as unstable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.