The quantum vector digital voltmeter of INMETRO

8th Brazilian Congress on Metrology

Ihlenfeld, Waldemar G. Kuerten^1 ; Landim, Regis P.^1

National Institute of Metrology, Quality and Technology - INMETRO, Av. Nossa Senhora das Gramas no. 50, Xérem, Duque de Caxias

RJ

25250-020, Brazil^1

关键词: AC sources;    Analog to digital converters;    Digital regulation;    Frequency synchronization;    Fully automated;    Josephson voltage;    Phase alignment;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/733/1/012079/pdf
DOI  :  10.1088/1742-6596/733/1/012079

来源: IOP

【 摘 要 】

The paper describes the quantum vector digital voltmeter developed at INMETRO, which is based on a programmable Josephson voltage synthesizer. The system employs digital regulation for phase-alignment and frequency synchronization of signals, is fully automated and allows calibration of ac sources and analog-to-digital converters with uncertainties bearing some parts of 10-07up to frequencies of around 500 Hz.