Dual-mode self-validating resistance/Johnson noise thermometer system

Patent · Thu Dec 31 23:00:00 EST 1992

OSTI ID:868864

Shepard, Robert L ^[1]; Blalock, Theron V ^[2]; Roberts, Michael J ^[2]

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1. Oak Ridge, TN
2. Knoxville, TN

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.

• Research Organization: LOCKHEED MARTIN ENRGY SYST INC
• DOE Contract Number: AC05-84OR21400
• Assignee: Martin Marietta Energy Systems, Inc. (Oak Ridge, TN)
• Patent Number(s): US 5228780
• OSTI ID: 868864
• Country of Publication: United States
• Language: English

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