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

Volume

54

Issue

2

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

641

Lastpage

644

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;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2005.843562

Filename

1408253