Temperature sensing apparatus and methods
US6799889B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 7, 2002 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Oct 7, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K7/015
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Circuits and methods for generating a temperature dependent signal are described involving: generating a thermal voltage referenced positive temperature coefficient signal using a pair of transistors operating at different current densities; generating a transistor voltage referenced negative temperature coefficient signal using a transistor voltage of one of said pair of transistors; and subtracting one of said positive and negative temperature coefficient signals from the other of said signals to generate said temperature dependent signal, whereby the temperature dependence of said temperature dependent signal is greater than either of said subtracted signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.