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

  • US 5,228,780 A
  • Filed: 10/30/1992
  • Issued: 07/20/1993
  • Est. Priority Date: 10/30/1992
  • Status: Expired due to Fees
First Claim
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1. A temperature measuring system comprising:

  • a sensor having a resistor;

    first signal processor means, having a current source constantly coupled to the sensor, for continuously producing a first temperature signal based on the DC resistance of the sensor resistor; and

    second signal processor means, coupled to the sensor, for continuously producing a second temperature signal based exclusively on the a.c. Johnson noise generated by the sensor resistor, said sensor simultaneously and independently measuring DC resistance and AC Johnson noise voltage.

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