Reduced Nonlinearities in the NIST Johnson Noise Thermometry System

Jifeng Qu; S.P. Benz; A. Pollardo; H. Rogalla

doi:10.1109/CPEM.2010.5543421

Reduced Nonlinearities in the NIST Johnson Noise Thermometry System

Jifeng Qu
, S.P. Benz
, A. Pollardo
, H. Rogalla

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

1 Citation (Scopus)

Abstract

Improved electronics and synthesized noise waveforms for the NIST quantum-voltage-standard-calibrated Johnson noise thermometer (JNT) have lead to reduced uncertainty in the temperature measurement. Recent measurements show that some of the distortion in the present electronics arises in the differential stage of both the preamplifier and the analog-digital converter (ADC). Distortion from the preamplifier can be reduced by compensating the DC offset of the signal at the inputs to the differential stage. A four-channel system with a new ADC is under construction to achieve the goal of re-determining the Boltzmann constant at a relative uncertainty of 6×10-6.

Original language	English
Title of host publication	Proceedings of the 27th Conference on Precision Electromagnetic Measurements (CPEM 2010) Digest
Place of Publication	Piscataway, NJ
Publisher	IEEE
Pages	74-75
ISBN (Electronic)	978-1-4244-6797-6, 978-1-4244-6796-9 (CD)
ISBN (Print)	978-1-4244-6795-2
DOIs	https://doi.org/10.1109/CPEM.2010.5543421
Publication status	Published - 13 Jun 2010
Externally published	Yes
Event	Conference on Precision Electromagnetic Measurements, CPEM 2010 - Daejeon, Korea, Republic of Duration: 13 Jun 2010 → 18 Jun 2010 Conference number: 27

Conference

Conference	Conference on Precision Electromagnetic Measurements, CPEM 2010
Abbreviated title	CPEM
Country/Territory	Korea, Republic of
City	Daejeon
Period	13/06/10 → 18/06/10

Keywords

n/a OA procedure

Access to Document

10.1109/CPEM.2010.5543421

1 Citations
1 Article

Reduced non-linearities and improved temperature measurements for the NIST Johnson noise thermometer
Qu, J., Benz, S. P., Rogalla, H. & White, D. R., 2009, In: Metrologia. 46, 5, p. 512-524 13 p.
Research output: Contribution to journal › Article › Academic › peer-review
27 Link opens in a new tab Citations (Scopus)

Cite this

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title = "Reduced Nonlinearities in the NIST Johnson Noise Thermometry System",

abstract = "Improved electronics and synthesized noise waveforms for the NIST quantum-voltage-standard-calibrated Johnson noise thermometer (JNT) have lead to reduced uncertainty in the temperature measurement. Recent measurements show that some of the distortion in the present electronics arises in the differential stage of both the preamplifier and the analog-digital converter (ADC). Distortion from the preamplifier can be reduced by compensating the DC offset of the signal at the inputs to the differential stage. A four-channel system with a new ADC is under construction to achieve the goal of re-determining the Boltzmann constant at a relative uncertainty of 6{\texttimes}10-6.",

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booktitle = "Proceedings of the 27th Conference on Precision Electromagnetic Measurements (CPEM 2010) Digest",

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Qu, J, Benz, SP, Pollardo, A & Rogalla, H 2010, Reduced Nonlinearities in the NIST Johnson Noise Thermometry System. in Proceedings of the 27th Conference on Precision Electromagnetic Measurements (CPEM 2010) Digest. IEEE, Piscataway, NJ, pp. 74-75, Conference on Precision Electromagnetic Measurements, CPEM 2010, Daejeon, Korea, Republic of, 13/06/10. https://doi.org/10.1109/CPEM.2010.5543421

TY - GEN

T1 - Reduced Nonlinearities in the NIST Johnson Noise Thermometry System

AU - Qu, Jifeng

AU - Benz, S.P.

AU - Pollardo, A.

AU - Rogalla, H.

N1 - Conference code: 27

PY - 2010/6/13

Y1 - 2010/6/13

N2 - Improved electronics and synthesized noise waveforms for the NIST quantum-voltage-standard-calibrated Johnson noise thermometer (JNT) have lead to reduced uncertainty in the temperature measurement. Recent measurements show that some of the distortion in the present electronics arises in the differential stage of both the preamplifier and the analog-digital converter (ADC). Distortion from the preamplifier can be reduced by compensating the DC offset of the signal at the inputs to the differential stage. A four-channel system with a new ADC is under construction to achieve the goal of re-determining the Boltzmann constant at a relative uncertainty of 6×10-6.

AB - Improved electronics and synthesized noise waveforms for the NIST quantum-voltage-standard-calibrated Johnson noise thermometer (JNT) have lead to reduced uncertainty in the temperature measurement. Recent measurements show that some of the distortion in the present electronics arises in the differential stage of both the preamplifier and the analog-digital converter (ADC). Distortion from the preamplifier can be reduced by compensating the DC offset of the signal at the inputs to the differential stage. A four-channel system with a new ADC is under construction to achieve the goal of re-determining the Boltzmann constant at a relative uncertainty of 6×10-6.

KW - n/a OA procedure

U2 - 10.1109/CPEM.2010.5543421

DO - 10.1109/CPEM.2010.5543421

M3 - Conference contribution

SN - 978-1-4244-6795-2

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EP - 75

BT - Proceedings of the 27th Conference on Precision Electromagnetic Measurements (CPEM 2010) Digest

PB - IEEE

CY - Piscataway, NJ

T2 - Conference on Precision Electromagnetic Measurements, CPEM 2010

Y2 - 13 June 2010 through 18 June 2010

ER -

Reduced Nonlinearities in the NIST Johnson Noise Thermometry System

Abstract

Conference

Keywords

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Research output

Reduced non-linearities and improved temperature measurements for the NIST Johnson noise thermometer

Cite this