AC resistance bridge based on the cryogenic current comparator

Author

Seppä, Heikki ; Satrapinski, Alexandre

Author_Institution

VTT Automation Meas. Technol., Espo, Finland

Volume

46

Issue

2

fYear

1997

fDate

4/1/1997 12:00:00 AM

Firstpage

463

Lastpage

466

Abstract

This paper describes a low-frequency ac resistance bridge based on a Cryogenic Current Comparator (CCC). The bridge is a main tool for resistance traceability of 10 kΩ, 100 Ω, and 1 Ω to the quantum Hall resistance (QHR). The bridge is typically operated with a PC generating a sinusoidal ac signal ranging from (0.1 to 2) Hz. Using a vector analyzer as a signal source the bridge is used to 1 kHz. Both sinusoidal and pseudo random signals have been used to compare the frequency dependence of standard resistors against the QHR. At present the bridge can be used to perform accurate calibrations to 10 Hz, at higher frequencies the self-resonance of the CCC increases the uncertainty

Keywords

SQUIDs; bridge instruments; calibration; cryogenics; current comparators; electric resistance measurement; measurement errors; quantum Hall effect; resistors; 0.1 Hz to 1 kHz; 1 ohm to 10 kohm; AC resistance bridge; SQUIDs; calibrations; cryogenic current comparator; pseudo random signals; quantum Hall resistance; resistance traceability; self-resonance; standard resistors; uncertainty; vector analyzer; Bridges; Cryogenics; Detectors; Electrical resistance measurement; Frequency dependence; Frequency measurement; Low-frequency noise; Resistors; SQUIDs; Signal generators;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.571886

Filename

571886