Paper Title:
Linear Conditioning of an NTC Thermistor Using Nonlinear Operational Amplifier Circuits
| Periodical | Advanced Materials Research (Volume 367) |
|---|---|
| Main Theme | Advances in Materials and Systems Technologies III |
| Edited by | A.O. Akii Ibhadode |
| Pages | 125-132 |
| DOI | 10.4028/www.scientific.net/AMR.367.125 |
| Citation | John T. Agee et al., 2011, Advanced Materials Research, 367, 125 |
| Online since | October, 2011 |
| Authors | John T. Agee, Shedden Masupe, Themba G. Modise |
| Keywords | Current Mirror, Logarithmic Amplifier, MULTISIM, Signal Conditioning Circuit, Thermistor, Voltage-to-Current Converter |
| Price | US$ 28,- |
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Abstract
Exponential nonlinearities in the thermistor limit the accuracy of the device for temperature measurement. This paper presents the design and implementation of a novel conditioning circuit for enhancing the accuracy of the sensor. Simulations of the conditioning circuit using MULTISIM were compared with the laboratory implementation. Results show that the proposed circuit could sufficiently linearise the thermistor characteristics and improve device sensitivity, throughout the range of sensor operation.
