A compact 14-bit cryogenic current comparator

Author

Gotz, Martin ; Pesel, Eckart ; Drung, Dietmar

Author_Institution

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

fYear

2014

fDate

24-29 Aug. 2014

Firstpage

684

Lastpage

685

Abstract

A cryogenic current comparator with an overall of 17,252 turns and windings including numbers of turns ranging from 2⁰ to 2¹³ has been realized. This system offers the possibility of resistance calibration at increased magnetic flux levels and allows for a direct calibration of 1 Ω to 100 MΩ normal resistors against the quantum Hall effect. Besides that, the very low-current measurements at PTB will benefit from the availability of this additional setup. Such applications include the use of this comparator as a current amplifier as well as for calibration of highly-stable transimpedance amplifiers.

Keywords

calibration; cryogenic electronics; current comparators; electric current measurement; electric resistance measurement; operational amplifiers; resistors; windings; PTB; compact cryogenic current comparator; current amplifier; highly-stable transimpedance amplifier; magnetic flux level; quantum Hall effect; resistance 1 ohm to 100 Mohm; resistance calibration; resistor; very low-current measurement; winding; word length 14 bit; Calibration; Cryogenics; Current measurement; Noise; Probes; SQUIDs; Windings; Bridge circuits; calibration; electrical resistance measurement; precision measurements; superconducting devices;

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.2014.6898570

Filename

6898570