Title :
Correlation method errors in Johnson noise thermometry
Author :
Callegaro, L. ; Pisani, M. ; Ortolano, M. ; D´Elia, V. ; Manta, F.
Author_Institution :
Ist. Naz. di Ricerca Metrol. (INRIM), Torino, Italy
Abstract :
The correlation method is used in Johnson noise thermometry to reject noise added by the amplifiers employed. The rejection is not perfect and a systematic error in the temperature reading appears. A method to estimate such error, based on mixed analytical-numerical simulation of sensor and amplifiers, is outlined and applied to compare two different amplifiers designed for the INRIM Johnson noise thermometer.
Keywords :
correlation methods; measurement errors; thermal noise; thermometers; Johnson noise thermometer; correlation method; systematic error; thermodynamic temperature; Analytical models; Circuit noise; Correlation; Density functional theory; Electromagnetic interference; Noise generators; Noise measurement; Resistors; Temperature sensors; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM), 2010 Conference on
Conference_Location :
Daejeon
Print_ISBN :
978-1-4244-6795-2
DOI :
10.1109/CPEM.2010.5543629
