Systems and methods for measuring temperature
US10175118B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 31, 2016 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | Mar 3, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K7/01
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A payment reader includes an anti-tamper circuit for comparing a voltage measured from a temperature sensing circuit with a voltage from one or more threshold nodes. A voltage of a measurement node of the temperature sensing circuit and of each threshold node may correspond to a temperature. A temperature comparison circuit may determine whether a pre-determined temperature threshold has been breached on a comparison of a voltage of the measurement node of the temperature sensing circuit with voltages corresponding to the one or more temperature thresholds. A tamper attempt may be detected if the voltage measured from the temperature sensing circuit exceeds a high voltage threshold or falls below a low voltage threshold. The temperature comparison circuit may provide an output to anti-tamper circuit indicating a result of the comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.