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Eur. Phys. J. Appl. Phys. 44, 205-209 (2008)
DOI: 10.1051/epjap:2008133
Analog set-up for non linear dielectric measurements up to 100 kHz
J.-M. Leblond1, R. Douali2, C. Legrand2, P. Ropa2 and R. Dabrowski31 Institut Universitaire de Technologie, 19 rue L. David, BP 689, 62228 Calais Cedex, France
2 LEMCEL, 50 rue F. Buisson, BP 717, 62228 Calais Cedex, France
3 Military University of Technology, Kaliskiego 2, 00-908 Warszawa, Poland
Received: 5 September 2007 / Accepted: 30 May 2008 / Published online: 17 July 2008
Abstract
In this paper, we present a new analog set-up for non linear dielectric measurements. The device is based on the auto-balanced bridge principle used in impedance analyzers. Its main advantage is to operate at high frequencies in comparison with a classical current amplifier. This extension consists in extracting the harmonics of a non sinusoidal current crossing the material. The set-up is used to perform non linear dielectric measurements on a ferroelectric liquid crystal and shows better performances than a previously published digital set-up.
84.30.-r - Electronic circuits.
84.37.+q - Measurements in electric variables.
07.50.-e - Electrical and electronic instruments and components.
© EDP Sciences 2008
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