Title :
AC QHE-based calibration of resistance standards
Author :
Bohacek, J. ; Svoboda, P. ; Vasek, P.
Author_Institution :
Fac. of Electr. Eng., Czech Tech. Univ., Prague, Czech Republic
Abstract :
A coaxial transformer bridge for QHE-based calibration of resistance standards has been developed. An 8-decade two-stage inductive voltage divider forms ratio arms of the bridge and triple-series connection of the reference QHE sample to the bridge is employed. Frequency characteristics of LEP heterostructures have been measured by comparing them against resistors with calculable frequency dependences. Two quadrifilar, Gibbings´s type resistors with nominal values of 12906 /spl Omega/ and 6453 /spl Omega/ have been used in this measurement.
Keywords :
calibration; electric resistance measurement; measurement standards; quantum Hall effect; 12906 ohm; 6453 ohm; AC QHE; LEP heterostructure; calibration; coaxial transformer bridge; frequency characteristics; inductive voltage divider; quadrifilar Gibbings type resistor; resistance standard; triple-series connection; Bridge circuits; Calibration; Coaxial cables; Frequency; Helium; Length measurement; Measurement standards; Resistors; Superconducting magnets; Temperature;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1996 Conference on
Conference_Location :
Braunschweig, Germany
Print_ISBN :
0-7803-3376-4
DOI :
10.1109/CPEM.1996.546666
