A digital quadrature bridge for impedance measurements

Author

Kurten Ihlenfeld, Waldemar G. ; Vasconcellos, R.T.B.

Author_Institution

Inst. Nac. de Metrol., Qualidade e Tecnol., Rio de Janeiro, Brazil

fYear

2014

fDate

24-29 Aug. 2014

Firstpage

106

Lastpage

107

Abstract

This paper describes a digital alternating current (ac) quadrature bridge for impedance measurements under development at INMETRO. This bridge is primarily intended to allow the comparison of ac resistors with standard capacitors but it could be applied to a myriad of impedance-measurement tasks as the precise determination of dissipation factor of capacitors, of resistor time-constants, as well as an aid in investigations on the nonlinear behavior of passive electronic components. Aimed at attaining measurement uncertainties of around 10 μΩ/Ω at 1 kHz under sinusoidal conditions, it has prospects for further improvements.

Keywords

bridge circuits; capacitors; electric impedance measurement; measurement standards; measurement uncertainty; resistors; INMETRO; capacitor; digital alternating current quadrature bridge; digital quadrature bridge; dissipation factor determination; frequency 1 kHz; impedance measurement; measurement uncertainty; nonlinear passive electronic component behavior; resistor time constant; Bridge circuits; Capacitors; Distortion measurement; Frequency measurement; Resistors; Temperature measurement; Voltage measurement; ac voltage; digital sampling; digital signal processing; dissipation factor; impedance; measurement standards; time-constant;

fLanguage

English

Publisher

ieee

Conference_Titel

Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on

Conference_Location

Rio de Janeiro

ISSN

0589-1485

Print_ISBN

978-1-4799-5205-2

Type

conf

DOI

10.1109/CPEM.2014.6898281

Filename

6898281