Title :
Fundamental determination of the loss factor of 1 /spl mu/f capacitors at 1 kHz
Author :
Ramm, G. ; Moser, H.
Author_Institution :
Phys. Tech. Bundesanstalt, Braunschweig, Germany
Abstract :
This paper presents a new measuring method which allows the loss factor of 1 /spl mu/F capacitors to be derived from the calculable time constant of a 200 /spl Omega/ AC resistor of bifilar structure. The method combines elements of the traditional bridge technique (Thomson balancing and Wagner earthing) with the digital synthesis of signals and their sampling using the discrete Fourier transform. The method allows the loss factor to be determined with an estimated standard uncertainty of measurement (k=1) of 2/spl times/10/sup -6/.
Keywords :
Bridge circuits; Capacitance measurement; Capacitors; Dielectric loss measurement; Discrete Fourier transforms; Measurement standards; Signal sampling; 1 kHz; 1 muF; AC resistor; Thomson balancing; Wagner earthing; bifilar structure; bridge technique; calculable time constant; digital synthesis of signals; discrete Fourier transform; impedance ratio; loss factor determination; lossy capacitors; signal sampling; standard capacitors; standard uncertainty; voltage follower; Bridges; Capacitors; Discrete Fourier transforms; Grounding; Loss measurement; Measurement standards; Resistors; Sampling methods; Signal synthesis; Time measurement;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2000 Conference on
Conference_Location :
Sydney, NSW, Australia
Print_ISBN :
0-7803-5744-2
DOI :
10.1109/CPEM.2000.850913
