Vojko Matko (Author)

Abstract

Generally, AT-cut quartz crystals have a limited scope of use when it comes to high-precision measurement of very small impedance changes due to their nonlinear frequency-temperature characteristics in the range between 0 °C and 50 °C. The new method improving quartz oscillator frequency-temperature characteristic compensation is switching between two impedance loads. By modifying the oscillator circuit with two logic switches and two impedance loads, the oscillator can switch oscillation between two resonance frequencies. The difference in resonance frequencies compensates the frequency-temperature characteristics influence as well as the influence of of fset and quartz crystal ageing. The experimental results show that the new approach using the switching method highly improves second-to-second frequency stability from +/-0.125 Hz to +/-0.00001 Hz and minute-to-minute frequency stability from 0.1 Hz to 0.0001 Hz, which makes the high-precision measurement of aF and fH changes possible.

Keywords

quartz crystal;switching oscillating method;temperature characteristic compensation;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FERI - Faculty of Electrical Engineering and Computer Science
UDC: 681.5
COBISS: 14953750 Link will open in a new window
ISSN: 1424-8220
Views: 884
Downloads: 317
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Slovenian
Secondary keywords: kvarčni kristali;oscilacijska metoda;temperaturna kompenzacija;
URN: URN:SI:UM:
Type (COBISS): Scientific work
Pages: str. 4474-4482
Volume: ǂVol. ǂ5
Issue: ǂiss. ǂ11
Chronology: 2011
DOI: 10.3390/s110504474
ID: 10844049