Frequency performance of 12906.4 ohm and 6453.2 ohm reference resistors for ac quantum Hall experiments

Project Description

Four-terminal-pair termostated travelling resistance standards with nominal values of 12906.4 ohm and 6453.2 ohm will be fabricated at the CMI. At all participating laboratories, measurements of frequency characteristics of these standards will be performed for a frequency range from dc to at least 5 kHz.


1) determination of the frequency dependence of the resistance value and

2) determination of the time constant of the standard,

these measurements will preferably be made by 1:1 comparison against resistors with calculable frequency performance.

Further Information

The project was agreed at the EUROMET experts meeting on the quantum Hall effect, Lisbon May 27, 1997.

Electricity and Magnetism (EM)
Jaroslav Bohacek
Phone: +42 02 2435 2220
Fax: +42 02 311 9929
Further Partners
Czech Technical University