SQUID Current Sensor With Differential Output

Author

Drung, D. ; Storm, Jan-Hendrik ; Beyer, Justus

Author_Institution

Phys.-Tech. Bundesanstalt (PTB), Berlin, Germany

Volume

23

Issue

3

fYear

2013

fDate

Jun-13

Firstpage

1100204

Lastpage

1100204

Abstract

We have developed a superconducting quantum interference device with differential output (diffSQUID). The device concept aims at improving the operability of SQUID current sensors in the presence of large common-mode signals. The diffSQUID is based on a series connection of two identical SQUID sensors. The biasing and input signal coupling provides for the differential output signal. The diffSQUID is read out by a fully differential amplifier. A compact, low-power, and low-noise differential amplifier has been developed for this purpose. This amplifier is partially powered via the diffSQUID´s combined bias and output signal leads and can be operated at temperatures between 77 and 300 K.

Keywords

SQUIDs; differential amplifiers; electric sensing devices; common-mode signal; diffSQUID current sensor; differential amplifier; differential output; input signal coupling; superconducting quantum interference device; temperature 77 K to 300 K; Electromagnetic interference; Noise; Resistors; SQUIDs; Temperature measurement; Transistors; Differential output; electromagnetic interference (EMI); low-power amplifier; superconducting quantum interference device (SQUID);

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2012.2227638

Filename

6353173