Circuitry and techniques for resistor-based temperature sensing
US9182295B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2012 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Feb 6, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K2219/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A temperature to digital converter circuitry to generate output data which is representative of one or more temperature dependent characteristics of a temperature sensitive device (for example, MEMS thermistor having a resistance that correlates to its temperature), the temperature to digital circuitry comprising a switched capacitor network to generate a effective reference resistance in response to a switching signal, a signal generator to generate the switching signal, wherein the switching signal has a switching frequency which is controlled, at least in part, via control data, comparator circuitry to generate error data using the effective reference resistance and the resistance of the temperature sensitive device, and converter circuitry to generate the output data which is representative of one or more temperature dependent characteristics of the temperature sensitive device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.