Title :
A compact 14-bit cryogenic current comparator
Author :
Gotz, Martin ; Pesel, Eckart ; Drung, Dietmar
Author_Institution :
Phys.-Tech. Bundesanstalt (PTB), Braunschweig, Germany
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;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4799-5205-2
DOI :
10.1109/CPEM.2014.6898570
