Method for improving voltage modulation depth of high T/sub c/ DC SQUID with large inductance

Author

Enpuku, K. ; Doi, H. ; Tokita, G. ; Maruo, T.

Author_Institution

Dept. of Electron., Kyushu Univ., Fukuoka, Japan

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

2762

Lastpage

2765

Abstract

Two methods are proposed in order to improve the voltage modulation depth of high-T/sub c/ DC SQUIDs in the case of large inductances. One is a damping resistance parallel to the inductance, and the other is a new SQUID using three junctions, which we call 3J-SQUID. Numerical simulation shows the usefulness of the present method. Moreover. It is shown that the improvement of the voltage modulation depth results in the improvement of magnetic flux noise in the white noise region. Therefore, the present method will enable the use of large inductances. The usefulness of the present method is also confirmed partly by experimental results.<>

Keywords

SQUIDs; high-temperature superconductors; inductance; magnetic flux; superconducting device noise; thermal noise; white noise; 3J-SQUID; damping resistance; high T/sub c/ DC SQUID; large inductance; magnetic flux noise; numerical simulation; three junctions; voltage modulation depth; white noise region; Circuit noise; Damping; Inductance; Magnetic flux; Magnetic modulators; Numerical simulation; SQUIDs; Thermal degradation; Voltage; White noise;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.403163

Filename

403163