Simple and Low-Cost Readout Circuit for Differential Resistive Sensors

Ratchanoo Katman; Apinai Rerkratn; Anucha Kaewpoonsuk

doi:10.15866/iree.v13i5.14995

Simple and Low-Cost Readout Circuit for Differential Resistive Sensors

Ratchanoo Katman⁽¹⁾, Apinai Rerkratn⁽²⁾, Anucha Kaewpoonsuk^(3*)

^(*) Corresponding author

Authors' affiliations

DOI: https://doi.org/10.15866/iree.v13i5.14995

Abstract

In this paper, a simple and low-cost readout circuit for differential resistive sensors is presented. The realization method is based on the relaxation oscillation technique, which utilizes the operational amplifiers (op-amps) with a single supply voltage. The oscillating output Duty-Cycle is proportional to the difference of two sensing resistances. In comparison with the traditional voltage divider circuit or the Wheatstone bridge circuit or the previously reported readout circuit based on CCIIs, the proposed circuit can be interfaced with microcontroller without using an analog-to-digital converter. Theoretical predictions are supported by the PSPICE simulation results and the experimental data. In applying a slide potentiometer with changes of slider positions of ±15 mm, it is found that the maximum error of the proposed circuit is approximately -2.90% of full-scale
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Keywords

Readout Circuit; Interface Circuit; Resistive Sensors; CCII

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References

R. Pallas-Areny, J. G. Webster, Sensors and Signal Conditioning (John Wiley & Sons, USA, 2001).

S. J. Azhari, H. Kaabi, AZKA Cell the Current-Mode Alternative of Bridge, IEEE Trans. Circuits Syst. I, Fundam. Theory Appl., vol. 47, n. 9, September 2000, pp.1277-1284.
http://dx.doi.org/10.1109/81.883322

M. Leinonen, J. Juuti, H. Jantunen, Interface Circuit for Resistive Sensors Utilizing Digital Potentiometers, Sensors and Actuators A: Physical, vol.138, n.1, July 2007, pp.97-104.
http://dx.doi.org/10.1016/j.sna.2007.04.017

Y. H. Ghallab, W. Badawy, A New Topology for Current-Mode Wheatstone Bridge, IEEE Trans. Circuits Syst. II, vol. 53, n. 1, January 2006, pp.18-22.
http://dx.doi.org/10.1109/tcsii.2005.854589

S. Gift, B. Maundy, A New Configurations of the Measurement of Small Resistance Changes, IEEE Trans. Circuits Syst. II, vol. 53, n. 3, March 2006, pp.178-182.
http://dx.doi.org/10.1109/tcsii.2005.857539

P. Julsereewong, A. Julsereewong, T. Najaroen, Operational conveyor-based interface circuit for differential resistive sensors, The SICE annual Conf., September 13-18, 2011, Tokyo, Japan.
http://dx.doi.org/10.1109/ecticon.2011.5947781

A. Julsereewong, P. Julsereewong, T. Rungkhum, H. Sasaki, H. Isoguchi, Resistive Sensor Interface Circuits Using Operational Conveyor and Operational Amplifier, ICIC Express Letters, vol. 6, n. 3, March 2012, pp.651-656.

A. Julsereewong, P. Julsereewong, T. Rungkhum, H. Sasaki, Interface circuit using operational conveyor for differential resistive sensors, The 10th ECTI-CON, May 15-17, 2013, Krabi, Thailand.
http://dx.doi.org/10.1109/ecticon.2013.6559501

A. De Marcellis, C. Reig, M.-D. Cubells, A novel current-based approach for very low variation detection of resistive sensors in wheatstone bridge configuration, The 2014 IEEE Sensors, December 15, 2014, Valencia, Spain.
http://dx.doi.org/10.1109/icsens.2014.6985452

Junsing, T., Julsereewong, A., Alternative of Bridge-Based Circuits for Differential Resistive Sensors, (2017) International Review of Electrical Engineering (IREE), 12 (2), pp. 159-165.
http://dx.doi.org/10.15866/iree.v12i2.11357

G. Ferri. A. De Marcellis, C. Di Carlo, V. Stornelli, A. Flammini, A. Depari, D. Marioli, E. Sisinni, A CCII-Based Low-Voltage Low-Power Read-Out Circuit for DC-Excited Resistive Gas Sensors, IEEE Sensors J., vol. 9, n. 12, December 2009, pp.2035-2041.
http://dx.doi.org/10.1109/jsen.2009.2033197

Z. Kokolanski, C. Gavrovski, V. Dimcev, M. Makraduli, Simple Interface for Resistive Sensors Based on Pulse Width Modulation, IEEE Trans. Instrum. Meas., vol. 62, n. 11, November 2013, pp. 2983-2992.
http://dx.doi.org/10.1109/tim.2013.2266025

V. Sreenath, K. Semeerali, B. George, A Resistive Sensor Readout Circuit With Intrinsic Insensitivity to Circuit Parameters and Its Evaluation, IEEE Trans. Instrum. Meas., vol. 66, n. 7, July 2017, pp.1719-1727.
http://dx.doi.org/10.1109/tim.2017.2673001

V. Ferrari, A. Ghisla, Zs. Kovács Vajna, D. Marioli, A. Taroni, ASIC Front-end Interface with Frequency and Duty Cycle Output for Resistive-Bridge Sensors, Sensors and Actuators A: Physical, vol. 138, n. 1, July 2007, pp.112-119.
http://dx.doi.org/10.1016/j.sna.2007.04.060

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