Title :
A precise evaluation of NbN-based 1-V programmable Josephson voltage standard arrays
Author :
Urano, Chiharu ; Murayama, Yasushi ; Iwasa, Akio ; Shoji, Akira ; Yamamori, Hirotake ; Ishizaki, M.
Author_Institution :
Nat. Inst. of Adv. Ind. Sci. & Technol., Japan
fDate :
4/1/2005 12:00:00 AM
Abstract :
A NbN-based programmable Josephson voltage standard arrays (PJVAs) have been investigated. We show that these arrays can be utilized for programmable operation up to ±1 V. The results of direct comparisons between the PJVA and a conventional superconductor-insulator-superconductor Josephson array agree at voltages between 0.1 V and 1 V within an uncertainty of better than 1 nV. An indirect comparison via a Zener voltage reference also shows agreement within a 1σ type A uncertainty of 13 nV.
Keywords :
measurement standards; niobium compounds; programmable circuits; superconductor-insulator-superconductor devices; titanium compounds; voltage measurement; 1 V; NbN-TiN; Zener voltage reference; indirect comparison; programmable Josephson voltage standard arrays; superconducting-normal-superconducting junction; superconductor-insulator-superconductor Josephson array; voltage measurement; Calibration; Filters; Frequency; Josephson junctions; Measurement standards; Superconducting device noise; Superconducting devices; Superconducting transition temperature; Testing; Voltage; Josephson array; programmable voltage standard; superconducting–normal–superconducting junction; voltage measurement; voltage standard;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2005.843530
