Circuit precautions for stable operation of Josephson junction array voltage standard

Author

Yoshida, H. ; Sakamoto, Y. ; Endo, T.

Author_Institution

Electrotech. Lab., Ibaraki, Japan

fYear

1990

fDate

11-14 June 1990

Firstpage

104

Lastpage

105

Abstract

Steps taken during the course of developing a Josephson junction array voltage standard to achieve a measurement uncertainty of better than 2*10/sup -8/ are described. They consist of improving the frequency stability of the Gunn oscillator by proper design of the phase-locked loop, choosing a digital voltmeter (DVM) with high resolution, low drift, and low noise emission for use as a null detector, and designing line filters to reduce noises introduced into the Josephson junction array.<>

Keywords

Gunn oscillators; Josephson effect; digital voltmeters; frequency stability; measurement standards; phase-locked loops; superconducting junction devices; voltage measurement; Gunn oscillator; Josephson junction array voltage standard; digital voltmeter; frequency stability; line filters; noise reduction; null detector; phase-locked loop; Circuits; Frequency; Josephson junctions; Measurement standards; Measurement uncertainty; Noise reduction; Phase noise; Phased arrays; Standards development; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements, 1990. CPEM '90 Digest., Conference on

Conference_Location

Ottawa, Ontario, Canada

Type

conf

DOI

10.1109/CPEM.1990.109944

Filename

109944

Link To Document

https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2561300