Twin cell memory-based physically unclonable function
US11329836B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2021 |
| Grant date | May 10, 2022 |
| Priority date | — |
| Expiry date | Mar 12, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2207/002
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A Physically Unclonable Function (PUF) structure includes an array of twin cells divided into two portions: one with first columns and one with second columns. Cells in each first column are connected to a corresponding pair of first bitlines. Cells in each second column are connected to a corresponding pair of second bitlines. A first column decoder is connected to the first bitlines and to a first input of sense amplifier (SA) and a second column decoder is connected to the second bitlines and to a second input of SA. Each read operation to generate a bit is directed to a first cell in a first column and a second cell in a second column and, during the read operation, signals on only one first bitline of the first column containing the first cell and only one second bitline of the second column containing the second cell are compared.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.