Calibration of temperature sensing circuitry in an electronic device
US8182139B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2008 |
| Grant date | May 22, 2012 |
| Priority date | — |
| Expiry date | Nov 15, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K15/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Temperature sensing circuitry is used for thermal management of an electronic device. The temperature sensing circuitry includes at least one thermistor placed at or near a component of the electronic device. The temperature sensing circuitry also includes a high-precision resistor for calibration purposes. The resistance of the resistor is equivalent to the resistance of the thermistor at a reference temperature. A calibration reading is obtained using a set current that is being passed through the resistor. An error present in the temperature sensing circuitry is determined based on the calibration reading and a design value. A temperature measurement associated with the component is then made using the thermistor, while the set current is being passed through the thermistor. The error is corrected in the temperature measurement of the component. Other embodiments are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.