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EFFECT OF ADDITIVE NOISE AND BANDPASS FILTER ON THE PERFORMANCE OF A JOSEPHSON JUNCTION NOISE THERMOMETER.

Author(s) : SOULEN R. J. Jr, VECHTEN D. van, SEPPA H.

Type of article: Article

Summary

A JOSEPHSON JUNCTION MAY BE USED TO CONVERT THE VOLTAGE FLUCTUATIONS GENERATED BY JOHNSON (IE, THERMAL) NOISE IN A RESISTOR INTO FREQUENCY FLUCTUATIONS. THE VARIANCE OF THE FREQUENCY FLUCTUATIONS IS THUS A MEASUREMENT OF THE JOHNSON NOISE AND, THEREFORE, OF THE TEMPERATURE. THIS PARTICULAR TYPE OF NOISE THERMOMETER HAS BEEN USED AS PART OF A PROGRAM TO DEFINE A CRYOGENIC TEMPERATURE SCALE. THE DETAILED INFLUENCE OF TWO TYPES OF POST-DETECTION BANDPASS FILTERS (SQUARE AND ONE-POLE BUTTERWORTH) HAVE BEEN STUDIED ON THE MEASURED VARIANCE.

Details

  • Original title: EFFECT OF ADDITIVE NOISE AND BANDPASS FILTER ON THE PERFORMANCE OF A JOSEPHSON JUNCTION NOISE THERMOMETER.
  • Record ID : 1983-0899
  • Languages: English
  • Source: Rev. sci. Instrum. - vol. 53 - n. 9
  • Publication date: 1982
  • Document available for consultation in the library of the IIR headquarters only.

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