CMOS compatible dew point sensor device and method of determining a dew point
US11525793B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 2021 |
| Grant date | Dec 13, 2022 |
| Priority date | — |
| Expiry date | May 18, 2041 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N25/68
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In an embodiment a method includes determining, for each capacitor element of a plurality of capacitor elements of a capacitor, an increase of a capacitance of a capacitor element caused by a decrease of a temperature of the capacitor and deriving a dew point from a temperature at which the increases of the capacitances or values corresponding to the increases of the capacitances exceed a predefined limit by generating a set of binary digits, each of the binary digits corresponding to one of the capacitor elements and indicating whether the capacitance of the capacitor element is within a predefined range, comparing sets of binary digits generated at different temperatures and determining a number of capacitor elements for which the corresponding binary digits of the sets are different and repeating the comparison for a sequence of sets generated at decreasing temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.