Capacitive temperature sensor comprising two capacitors as a voltage divider bridge
US9702766B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 19, 2012 |
| Grant date | Jul 11, 2017 |
| Priority date | — |
| Expiry date | Mar 3, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K7/34
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature sensor including a capacitive circuit including an input terminal for the application of an input voltage, an output terminal for the reading of an output voltage of the circuit, and a reference potential terminal, a voltage circuit for applying a predetermined voltage to the input terminal of the circuit and a circuit for reading the voltage at the output terminal of the capacitive circuit and converting the read voltage into a temperature measurement. According to the invention, the capacitive circuit includes a fir capacitor, connected between the input and output terminals, and having a capacitance decreasing according to temperature; and a second capacitor, connected between the input terminal and the terminal at the reference potential, and having a capacitance increasing along with temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.