Title :
Direct determination of capacitance standards using a quadrature bridge and a pair of quantised Hall resistors
Author :
Inglis, A.D. ; Wood, B.M. ; Cote, M. ; Young, R.B. ; Early, M.D.
Author_Institution :
Inst. for Nat. Meas. Stand., Nat. Res. Council of Canada, Ottawa, Ont., Canada
Abstract :
We describe measurements made using a quadrature bridge to simultaneously compare two quantum Hall resistors (QHRs) with two 10 nF capacitors at 1233 Hz. This direct approach eliminates uncertainties due to thermal and structural instabilities and to AC/DC differences of the wire resistors normally used with an AC ratio bridge as an intermediary stage.
Keywords :
Hall effect devices; bridge circuits; capacitance measurement; capacitors; measurement standards; measurement uncertainty; quantum Hall effect; resistors; thermal stability; 10 nF; 1233 Hz; AC ratio bridge intermediary stage; QHR; capacitance standards; capacitors; quadrature bridge; quantised Hall resistor pair; quantum Hall resistors; structural instability uncertainties; thermal instability uncertainties; wire resistor AC/DC differences; Bridge circuits; Capacitance; Capacitors; Councils; Frequency; Laboratories; Magnetic field measurement; Measurement standards; Resistors; Wire;
Conference_Titel :
Precision Electromagnetic Measurements, 2002. Conference Digest 2002 Conference on
Conference_Location :
Ottawa, Ontario, Canada
Print_ISBN :
0-7803-7242-5
DOI :
10.1109/CPEM.2002.1034812
