DocumentCode
3462372
Title
Uncertainties in the measurement of ac voltage using a programmable Josephson voltage standard and a phase sensitive null detector
Author
Georgakopoulos, D.
Author_Institution
Nat. Meas. Inst., Lindfield, NSW, Australia
fYear
2010
fDate
13-18 June 2010
Firstpage
187
Lastpage
188
Abstract
This paper investigates the required characteristics and the systematic errors of a lock-in amplifier (LIA) when it is used as a null detector for the measurement of AC voltage by comparison with a stepwise approximated sinewave (SASW) generated using a programmable Josephson voltage standard. It is shown that the uncertainties introduced by the LIA in the measurement are related to the number of samples per period of the SASW and can be reduced to levels below 0.5 μV/V.
Keywords
measurement standards; measurement uncertainty; phase detectors; voltage measurement; AC voltage measurement uncertainty; a stepwise approximated sinewave; lock-in amplifier; null detector; phase sensitive null detector; programmable Josephson voltage standard; systematic errors; AC generators; Detectors; Electromagnetic measurements; Measurement standards; Measurement uncertainty; Phase detection; Phase measurement; Power harmonic filters; Total harmonic distortion; Voltage measurement;
fLanguage
English
Publisher
ieee
Conference_Titel
Precision Electromagnetic Measurements (CPEM), 2010 Conference on
Conference_Location
Daejeon
Print_ISBN
978-1-4244-6795-2
Type
conf
DOI
10.1109/CPEM.2010.5543436
Filename
5543436
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