Vojko Matko (Author), Miro Milanovič (Author)

Abstract

This article proposes a novel method for the temperature-compensated inductance-to-frequency converter with a single quartz crystal oscillating in the switching oscillating circuit to achieve better temperature stability of the converter. The novelty of this method lies in the switching-mode converter, the use of additionally connected impedances in parallel to the shunt capacitances of the quartz crystal, and two inductances in series to the quartz crystal. This brings a considerable reduction of the temperature influence of AT-cut crystal frequency change in the temperature range between 10 and 40 °C. The oscillator switching method and the switching impedances connected to the quartz crystal do not only compensate for the crystalʼs natural temperature characteristics but also any other influences on the crystal such as ageing as well as from other oscillating circuit elements. In addition, the method also improves frequency sensitivity in inductance measurements. The experimental results show that through high temperature compensation improvement of the quartz crystal characteristics, this switching method theoretically enables a 2 pH resolution. It converts inductance to frequency in the range of 85-100 nH to 2-560 kHz.

Keywords

inductance-to-frequency;switching methods;dynamic temperature compensation of circuit elements;precision metrology;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FERI - Faculty of Electrical Engineering and Computer Science
UDC: 621.31
COBISS: 18183190 Link will open in a new window
ISSN: 1424-8220
Views: 631
Downloads: 298
Average score: 0 (0 votes)
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Other data

Secondary language: Slovenian
Secondary keywords: induktanca;frekvenca;konverterji;dinamična temperaturna kompenzacija elementov vezja;preciznost;metrologija;senzorska stikala;
URN: URN:SI:UM:
Type (COBISS): Scientific work
Pages: str. 19242-19259
Volume: ǂVol. ǂ14
Issue: ǂno. ǂ10
Chronology: 2014
DOI: 10.3390/s141019242
ID: 10844045