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New quartz oscillator switching method for nano-Henry range inductance measurements.

Matko V, Jezernik K - Sensors (Basel) (2012)

Bottom Line: The real novelty of this method, however, lies in a considerable reduction of the temperature influence of AT-cut crystal frequency change in the temperature range between 0 °C and 50 °C through a switching method which compensates for the crystal's natural temperature characteristics.This allows for the compensation of any influences on the crystal such as the compensation of the non-linear temperature characteristics and the ageing of both the crystal and other oscillating circuit elements, as well as the reduction of the output frequency measurement errors with the help of an additional reference frequency.The experimental results show that the switching method greatly improves the measurement of small inductance changes in the range between μH and nH, allowing as a result high-precision measurements (~0.35 fH) in this range.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Electrical Engineering and Computer Science, University of Maribor, Maribor, Slovenia. karel.jezernik@uni-mb.si

ABSTRACT
This article introduces a new method for nano-Henry inductance measurements at the frequency of 4.999 MHz with a single quartz crystal oscillating in the switching oscillating circuit. The real novelty of this method, however, lies in a considerable reduction of the temperature influence of AT-cut crystal frequency change in the temperature range between 0 °C and 50 °C through a switching method which compensates for the crystal's natural temperature characteristics. This allows for the compensation of any influences on the crystal such as the compensation of the non-linear temperature characteristics and the ageing of both the crystal and other oscillating circuit elements, as well as the reduction of the output frequency measurement errors with the help of an additional reference frequency. The experimental results show that the switching method greatly improves the measurement of small inductance changes in the range between μH and nH, allowing as a result high-precision measurements (~0.35 fH) in this range.

No MeSH data available.


Quartz crystal sensitivity for different k for Lm1 and different CL.
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f3-sensors-12-03105: Quartz crystal sensitivity for different k for Lm1 and different CL.

Mentions: Figures 3 illustrates stepwise capacitance value changes CL = 3.3 nF, 10 nF and 100 nF at constant compensation factors k for inductances Lm1 and Lm2 = 123.75 μH. One can see that the capacitance CL can also be used to set the sensitivity (inclination).


New quartz oscillator switching method for nano-Henry range inductance measurements.

Matko V, Jezernik K - Sensors (Basel) (2012)

Quartz crystal sensitivity for different k for Lm1 and different CL.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3376594&req=5

f3-sensors-12-03105: Quartz crystal sensitivity for different k for Lm1 and different CL.
Mentions: Figures 3 illustrates stepwise capacitance value changes CL = 3.3 nF, 10 nF and 100 nF at constant compensation factors k for inductances Lm1 and Lm2 = 123.75 μH. One can see that the capacitance CL can also be used to set the sensitivity (inclination).

Bottom Line: The real novelty of this method, however, lies in a considerable reduction of the temperature influence of AT-cut crystal frequency change in the temperature range between 0 °C and 50 °C through a switching method which compensates for the crystal's natural temperature characteristics.This allows for the compensation of any influences on the crystal such as the compensation of the non-linear temperature characteristics and the ageing of both the crystal and other oscillating circuit elements, as well as the reduction of the output frequency measurement errors with the help of an additional reference frequency.The experimental results show that the switching method greatly improves the measurement of small inductance changes in the range between μH and nH, allowing as a result high-precision measurements (~0.35 fH) in this range.

View Article: PubMed Central - PubMed

Affiliation: Faculty of Electrical Engineering and Computer Science, University of Maribor, Maribor, Slovenia. karel.jezernik@uni-mb.si

ABSTRACT
This article introduces a new method for nano-Henry inductance measurements at the frequency of 4.999 MHz with a single quartz crystal oscillating in the switching oscillating circuit. The real novelty of this method, however, lies in a considerable reduction of the temperature influence of AT-cut crystal frequency change in the temperature range between 0 °C and 50 °C through a switching method which compensates for the crystal's natural temperature characteristics. This allows for the compensation of any influences on the crystal such as the compensation of the non-linear temperature characteristics and the ageing of both the crystal and other oscillating circuit elements, as well as the reduction of the output frequency measurement errors with the help of an additional reference frequency. The experimental results show that the switching method greatly improves the measurement of small inductance changes in the range between μH and nH, allowing as a result high-precision measurements (~0.35 fH) in this range.

No MeSH data available.