Dual-mode self-validating resistance/Johnson noise thermometer system
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United States of America Patent
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Jul 20, 1993
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N/A
app pub date -
Oct 30, 1992
filing date -
Oct 30, 1992
priority date (Note) -
Expired
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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.
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