PUF-based magnetometer with safety protection circuit
US12326489B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2023 |
| Grant date | Jun 10, 2025 |
| Priority date | — |
| Expiry date | Feb 16, 2044 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10D84/83
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A PUF-based magnetometer with a safety protection circuit is provided. The PUF-based magnetometer includes a TMR magnetometer main structure, a control circuit, a column encoder circuit, a row encoder circuit, a multiplexer and a dynamic comparator. The TMR magnetometer main structure includes n*n TMR sensors, and the TMR magnetometer main structure can also form a PUF circuit together with a control circuit, a column encoder circuit, a row encoder circuit, a multiplexer and a dynamic comparator to realize a function of a TMR magnetometer. The PUF circuit generates PUF response signals based on random deviations of a TMR sensor fabrication process. The PUF response signals generated by the PUF circuit make it more difficult for attackers to locate specific positions of the TPR sensors, and even make it hard to know the existence of the deviations of the TMR sensors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.