An automated Josephson based ac-voltage calibration system

Author

Kurten Ihlenfeld, Waldemar G. ; Landim, Regis P.

Author_Institution

Inst. Nac. de Metrol., Qualidade e Tecnol. (INMETRO), Rio de Janeiro, Brazil

fYear

2014

fDate

24-29 Aug. 2014

Firstpage

468

Lastpage

469

Abstract

This paper describes a new calibration system developed at INMETRO to guarantee traceability of low-frequency alternating (ac) voltage calibrations (up to around 1 kHz) to a programmable Josephson ac waveform synthesizer. The automated full synchronous system allows the synchronization of a calibrator or signal synthesizer with a programmable Josephson voltage synthesizer system to be made by employing digital sampling and data processing techniques, aided by adaptive digital control. Digital regulators allow synchronization between signals with nanoradian resolution and thus the correct determination of their spectral content.

Keywords

Josephson effect; adaptive control; calibration; digital control; electric current measurement; programmable circuits; signal sampling; signal synthesis; synchronisation; voltage measurement; AC-voltage calibration system; INMETRO; adaptive digital control; automated full synchronous system; automated programmable Josephson AC waveform synthesizer; data processing technique; digital regulator; digital sampling; low-frequency alternating voltage calibration system; nanoradian resolution; programmable Josephson voltage synthesizer system; signal synthesizer; spectral content determination; Calibration; Regulators; Signal resolution; Standards; Synchronization; Synthesizers; Voltage measurement; Ac voltage; Josephson; digital signal processing; measurement; measurement standards; spectral analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on

Conference_Location

Rio de Janeiro

ISSN

0589-1485

Print_ISBN

978-1-4799-5205-2

Type

conf

DOI

10.1109/CPEM.2014.6898462

Filename

6898462