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

fYear

2002

fDate

16-21 June 2002

Firstpage

242

Lastpage

243

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements, 2002. Conference Digest 2002 Conference on

Conference_Location

Ottawa, Ontario, Canada

Print_ISBN

0-7803-7242-5

Type

conf

DOI

10.1109/CPEM.2002.1034812

Filename

1034812