An Automated Josephson-Based AC-Voltage Calibration System

Author

Kurten Ihlenfeld, Waldemar G. ; Pinheiro Landim, Regis

Author_Institution

Inst. Nac. de Metrol., Duque de Caxias, Brazil

Volume

64

Issue

6

fYear

2015

fDate

Jun-15

Firstpage

1779

Lastpage

1784

Abstract

This paper describes a new calibration system developed at INMETRO to guarantee traceability of low-frequency alternating current (ac) voltage calibrations (<;1 kHz) to a programmable Josephson ac waveform synthesizer. The automated full-synchronous system allows the synchronization of a commercial calibrator or signal synthesizer with a programmable Josephson voltage synthesizer system to be made by employing digital sampling and signal processing techniques, aided by adaptive digital control. It allows accurate determination of the spectral content of ac signals with minimum human intervention. System operation, measurement techniques, and data analysis are detailed.

Keywords

adaptive control; calibration; digital control; frequency synthesizers; measurement standards; signal sampling; superconducting junction devices; synchronisation; voltage measurement; waveform generators; INMETRO; adaptive digital control; automated full synchronous system; calibration system; digital sampling; low-frequency alternating current voltage calibration; programmable Josephson ac waveform synthesizer; programmable Josephson voltage synthesizer system; signal processing technique; signal synthesizer; spectral content determination; synchronization; Calibration; Gain measurement; Noise; Regulators; Standards; Synchronization; Voltage measurement; AC voltage; Josephson; digital signal processing; measurement standards; power; spectral analysis; spectral analysis.;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/TIM.2014.2383092

Filename

7005513