Physical unclonable function cell and array
US8525549B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2012 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Feb 23, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K5/1534
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A function cell comprising a first field effect transistor (FET) device, a second FET device, a first node connected to a gate terminal of the first FET device and a gate terminal of the second FET device, wherein the first node is operative to receive a voltage signal from an alternating current (AC) voltage source, an amplifier portion connected to the first FET device and the second FET device, the amplifier portion operative to receive a signal from the first FET device and the second FET device, a phase comparator portion having a first input terminal connected to an output terminal of the amplifier and a second input terminal operative to receive the voltage signal from the AC voltage source, the phase comparator portion operative to output a voltage indicative of a bit of a binary value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.