Dual-mode self-validating resistance/Johnson noise thermometer system
US5228780A · kind A · utility
89Cited by
9References
14Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 30, 1992 |
| Grant date | Jul 20, 1993 |
| Priority date | — |
| Expiry date | Oct 30, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K7/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A dual-mode Johnson noise and DC resistance thermometer capable of use in control systems where prompt indications of temperature changes and long term accuracy are needed. A resistance-inductance-capacitance (RLC) tuned circuit produces a continuous voltage signal for Johnson noise temperature measurement. The RLC circuit provides a mean-squared noise voltage that depends only on the capacitance used and the temperature of the sensor. The sensor has four leads for simultaneous coupling to a noise signal processor and to a DC resistance signal processor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.