A Novel Design Of An NTC Thermistor Linearization Circuit

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A novel design of a circuit used for NTC thermistor linearization is proposed. The novelty of the proposed design consists in a specific combination of two linearization circuits, a serial-parallel resistive voltage divider and a two-stage piecewise linear analog-to-digital converter. At the output of the first linearization circuit the quasi-linear voltage is obtained. To remove the residual voltage nonlinearity, the second linearization circuit, i.e., a two-stage piecewise linear analog-to-digital converter is employed. This circuit is composed of two flash analog-to-digital converters. The first analog-to-digital converter is piecewise linear and it is actually performing the linearization, while the second analog-to-digital converter is linear and it is performing the reduction of the quantization error introduced by the first converter. After the linearization is performed, the maximal absolute value of a difference between the measured and real temperatures is 0.014°C for the temperature range between −25 and 75°C, and 0.001°C for the temperature range between 10 and 40°C.

[1] Fraden, J. (2010). Handbook of Modern Sensors: Physics, Designs, and Applications. New York: Springer Science+Business Media.

[2] Webster, J.G. (1999). The Measurement, Instrumentation and Sensors Handbook. Boca Raton: CRC Press LLC.

[3] Lopez-Martin, A.J., Carlosena, A. (2013). Sensor signal linearization techniques: a comparative analysis. Proc. of IEEE LASCAS 2013. Cusco, Peru, 1–4, http://dx.doi.org/10.1109/LASCAS.2013.6519013

[4] Stankovic, S.B., Kyriacou, P.A. (2011). Comparison of thermistor linearization techniques for accurate temperature measurement in phase change materials. J. Phys. Conf. Ser., 307(1), 1–6.

[5] Sarkar, A.R., Dey, D., Munshi, S. (2013). Linearization of NTC thermistor characteristic using op-amp based inverting amplifier. IEEE Sensors J., 13(12), 4621–4626.

[6] Kumar, A., Singlab, M.L., Kumarb, A., Rajputc, J.K. (2015). POMANI-Mn3O4 based thin film NTC thermistor and its linearization for overheating protection sensor. Mater. Chem. Phys., 156(2015), 150–162.

[7] Bucci, G., Faccio, M., Landi, C. (2000). New ADC with piecewise linear characteristic: case study-implementation of a smart humidity sensor. IEEE Trans. Instrum. Meas., 49(6), 1154–1166.

[8] Lopez-Martin, A.J., Zuza, M., Carlosena, A. (2003). A CMOS A/D converter with piecewise linear characteristic and its application to sensor linearization. Analog. Integr. Circ. S., 36(1–2), 39–46.

[9] Mohan, N.M., Kumar, V.J., Sankaran, P. (2011). Linearizing dual-slope digital converter suitable for a thermistor. IEEE Trans. Instrum. Meas., 60(5), 1515–1521.

[10] Živanović, D., Lukić, J., Denić, D. (2014). A novel linearization method of sin/cos sensor signals used for angular position determination. J. Electr. Eng. Technol, 9(4), 1437–1445.

[11] Steinhart, J.S., Hart, S.R. (1968). Calibration curves for thermistors. Deep-Sea Res, 15(4), 497–503.

[12] NTSD0XV103FE1B0 Temperature Sensor Lead Insulation Type. Datasheet for Murata. https://www.jameco.com/Jameco/Products/ProdDS/1870999.pdf (Jan. 2005).

Metrology and Measurement Systems

The Journal of Committee on Metrology and Scientific Instrumentation of Polish Academy of Sciences

Journal Information

IMPACT FACTOR 2016: 1.598

CiteScore 2016: 1.58

SCImago Journal Rank (SJR) 2016: 0.460
Source Normalized Impact per Paper (SNIP) 2016: 1.228


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