Title :
Fundamental comparison measurement between sinusoidal and stepwise-approximated sine wave generated by programmable Josephson voltage standard at NIM
Author :
Huang Lu ; Wang Zengmin ; Yang Yan ; Gao Yuan ; Lu Zuliang
Author_Institution :
Nat. Inst. of Metrol., Beijing, China
Abstract :
This paper described one differential measurement method by using a lock-in amplifier as null detector, which can directly compare one high-purity sinusoidal [HPS] produced by a commercial precision calibrator with one stepwise-approximated sine wave [SASW] generated by programmable Josephson voltage standard [PJVS] in fundamental root-mean-square [FRMS] values at NIM. The preliminary results show that the FRMS values of the HPV between the calibrated ones in term of the PJVS and the measured ones from a commercial automated ac measurement reference instrument agree within less than 1.5 μV/V at the frequency below 200 Hz.
Keywords :
Josephson effect; amplifiers; calibration; electric current measurement; measurement standards; sensors; voltage measurement; FRMS value; HPS; NIM; PJVS; SASW; automated AC measurement; fundamental root-mean-square value; high-purity sinusoidal; lock-in amplifier; null detector; one differential measurement method; precision calibrator; programmable Josephson voltage standard; reference instrument; sinusoidal sine wave measurement; stepwise-approximated sine wave measurement; Amplifiers; Detectors; Frequency measurement; Harmonic analysis; Josephson junctions; Standards; Voltage measurement; Fundamental root-mean-square value; Lock-in amplifier; Programmable Josephson voltage standard; Quantization error; Stepwise-approximated sine wave;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4799-5205-2
DOI :
10.1109/CPEM.2014.6898490
