Correction for parasitic voltages in resistance thermometry
US6158887A · kind A · utility
16Cited by
7References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 26, 1999 |
| Grant date | Dec 12, 2000 |
| Priority date | — |
| Expiry date | Feb 26, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus employing a method for measuring the temperature of a sensor (Rx) having a resistance which varies in accordance with the temperature of the sensor, using a switching sequence to apply a parasitic voltage correction signal to the input of an amplifier in the measurement circuit whereby the sensor generates an offset response signal which is amplified and adjusted to substantially minimize the amplified offset response signal. The temperature of the sensor is calculated from the amplified response signal in accordance with a predetermined algorithm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.