Title :
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
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;
Conference_Titel :
Precision Electromagnetic Measurements (CPEM 2014), 2014 Conference on
Conference_Location :
Rio de Janeiro
Print_ISBN :
978-1-4799-5205-2
DOI :
10.1109/CPEM.2014.6898281
