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The paper describes a new electronic conditioning circuit based on the current-processing technique for accurate and reliable humidity measurement, without post-processing requirements. Pseudobrookite nanocrystalline (Fe2TiO5) thick film was used as capacitive humidity transducer in the proposed design. The interface integrated circuit was realized in TSMC 0.18 μm CMOS technology, but commercial devices were used for practical realization. The sensing principle of the sensor was obtained by converting the information on environment humidity into a frequency variable square-wave electric current signal. The proposed solution features high linearity, insensitivity to temperature, as well as low power consumption. The sensor has a linear function with relative humidity in the range of Relative Humidity (RH) 30-90 %, error below 1.5 %, and sensitivity 8.3 x 1014 Hz/F evaluated over the full range of changes. A fast recovery without the need of any refreshing methods was observed with a change in RH. The total power dissipation of readout circuitry was 1 mW.
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The paper describes a new electronic conditioning circuit based on the current-processing technique for accurate and reliable humidity measurement, without post-processing requirements. Pseudobrookite nanocrystalline (Fe2TiO5) thick film was used as capacitive humidity transducer in the proposed design. The interface integrated circuit was realized in TSMC 0.18 μm CMOS technology, but commercial devices were used for practical realization. The sensing principle of the sensor was obtained by converting the information on environment humidity into a frequency variable square-wave electric current signal. The proposed solution features high linearity, insensitivity to temperature, as well as low power consumption. The sensor has a linear function with relative humidity in the range of Relative Humidity (RH) 30-90 %, error below 1.5 %, and sensitivity 8.3 x 1014 Hz/F evaluated over the full range of changes. A fast recovery without the need of any refreshing methods was observed with a change in RH. The total power dissipation of readout circuitry was 1 mW.

New Electronic Interface Circuits for Humidity Measurement Based on the Current Processing Technique

Department of Electronics, Faculty of Technical Sciences Čačak

Measurement Science Review

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The paper describes a new electronic conditioning circuit based on the current-processing technique for accurate and reliable humidity measurement, without...

New Electronic Interface Circuits for Humidity Measurement Based on the Current Processing Technique

Publié en ligne: 30 mars 2021

Pages: 1 - 10

Reçu: 30 sept. 2020

Accepté: 26 févr. 2021

DOI: https://doi.org/10.2478/msr-2021-0001

Mots clés
Humidity sensor, capacity sensor interface, current-processing technique, DXCCTA, experimental verification

© 2021 Predrag B. Petrović et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

New Electronic Interface Circuits for Humidity Measurement Based on the Current Processing Technique

Publié en ligne: 30 mars 2021

Pages: 1 - 10

Reçu: 30 sept. 2020

Accepté: 26 févr. 2021

DOI: https://doi.org/10.2478/msr-2021-0001

Mots clésHumidity sensor, capacity sensor interface, current-processing technique, DXCCTA, experimental verification

© 2021 Predrag B. Petrović et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
Humidity sensor, capacity sensor interface, current-processing technique, DXCCTA, experimental verification