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Alternative of Bridge-Based Circuits for Differential Resistive Sensors


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DOI: https://doi.org/10.15866/iree.v12i2.11357

Abstract


This paper presents an alternative approach to implement a signal conditioning circuit for measuring resistance relative changes of differential resistive sensors. The proposed analog circuit uses two operational conveyors and one operational amplifier (opamp) as active building blocks to produce an output voltage as a function of the relative change of the sensor. In comparison with the classic voltage-mode Wheatstone bridge (VMWB) configuration, the sensor relative change can be estimated by the proposed circuit without using any sensor reference resistor. Surpassing a current-mode Wheatstone bridge (CMWB) using second-generation current conveyors (CCIIs), the proposed configuration provides higher accuracy. Compared to existing mixed-mode configurations realized in integrated circuit form, the proposed circuit offers simpler construction. PSPICE simulation and experimental results are given to verify the effectiveness of the proposed circuit. Test results obtained by utilizing the implemented prototype for a commercial linear position sensor are also included.
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Keywords


Analog Circuit; Bridge-based Circuit; Differential Resistive Sensor; Potentiometer; Signal Conditioning

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References


C. D. Johnson, Process Control Instrumentation Technology (Prentice-Hall, USA, 1997).

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, September 2000, pp.1277-1284.
http://dx.doi.org/10.1109/81.883322

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

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.
http://dx.doi.org/10.1109/ecticon.2013.6559501

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

S. J. Gift, Hybrid Current Conveyor-Operational Amplifier Circuit, Int. J. of Electron., vol.88 n.12, December 2001, pp.1225-1235.
http://dx.doi.org/10.1080/00207210110092726

J. Frasen, Handbook of Modern Sensors. Physics Designs and Applications (Springer-Verlag, USA, 2004).
http://dx.doi.org/10.5860/choice.31-2130

B. G. Liptak, Instrument Engineers’ Handbook. Process Measurement and Analysis (Butterworth-Heinemann, USA, 1995).
http://dx.doi.org/10.1201/9781420064025

J. D. Turner, L. Austin, Sensors for Automotive Telematics, Meas. Sci. & Technol., vol.11 n.2, February 2000, pp. R58-R79.
http://dx.doi.org/10.1088/0957-0233/11/2/202

S. Gift, B. Maundy, New Configurations for 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


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