Title :
Josephson voltage standard as a current reference and practical method for stabilization of high current
Author :
Kim, Kyu-Tae ; Kim, Mun-Seog ; Kim, Myungsoo ; Niemeyer, Jürgen
Author_Institution :
Korea Res. Inst. of Stand. & Sci., Daejeon, South Korea
fDate :
4/1/2005 12:00:00 AM
Abstract :
A stable reference source with a high current capability is useful for many metrological applications. Unlike the conventional Josephson voltage standard, one can couple the programmable Josephson voltage standard (PJVS) to a current source below milliamp range to stabilize the current. For higher current ranges, we tested a feedback method which allowed us to stabilize the 0.1-A output current of a commercial current source to within a standard deviation of 2 × 10-8 A/A.
Keywords :
circuit feedback; circuit stability; constant current sources; measurement standards; reference circuits; superconducting junction devices; voltage measurement; current reference source; current source; current stabilization; feedback method; high current capability; metrological applications; programmable Josephson voltage standard; reversible thermal electromotive force; stable reference source; Circuits; Force feedback; Josephson junctions; Measurement standards; Microwave antenna arrays; Resistors; Stability; Testing; Thermal force; Voltage; Current reference source; current stabilization; programmable Josephson voltage standard (PJVS); reversible thermal electromotive force (EMF); voltage standard;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2005.843562
