Title :
Low-Frequency Characterization in Thermal Converters Using AC-Programmable Josephson Voltage Standard System
Author :
Amagai, Yasutaka ; Maruyama, Mihoko ; Fujiki, Hiroyuki
Author_Institution :
Nat. Inst. of Adv. Ind. Sci. & Technol., Nat. Metrol. Inst. of Japan, Tsukuba, Japan
Abstract :
We have measured the low-frequency characteristics of thermal voltage converters down to 1 Hz using a differential sampling measurement system based on ac-programmable Josephson voltage standard (AC-PJVS) system. The measured ac-dc transfer difference of a planar multijunction thermal converter using our system is evaluated to be <; 1 μV/V above 10 Hz and <; 35 μV/V at 1 Hz with lower uncertainties compared to the conventional method. The estimated overall uncertainty measured by using our system is 3.1 μV/V (k = 1) at the frequency of 10 Hz and root-mean-square voltage of 3 V. Our measurement results above 10 Hz are in good agreement with the results obtained by the conventional method within a standard deviation of the mean. Our differential sampling measurement system using AC-PJVS is a useful tool for low-frequency ac voltage metrology.
Keywords :
Josephson effect; convertors; measurement standards; measurement systems; measurement uncertainty; sampling methods; voltage measurement; AC programmable Josephson voltage standard system; AC-DC transfer difference measurement; AC-PJVS; differential sampling measurement system; frequency 1 Hz; frequency 10 Hz; frequency characteristics measurement; measurement uncertainty; planar multijunction thermal converter; root mean square voltage; standard deviation; thermal voltage converter; voltage 3 V; Apertures; Frequency measurement; Measurement uncertainty; Standards; Temperature measurement; Uncertainty; Voltage measurement; AC–DC difference; Josephson devices; Josephson effect; electrical variable measurement; thermal converters;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2013.2245182
