Linear Conditioning of an NTC Thermistor Using Nonlinear Operational Amplifier Circuits

John T. Agee; Shedden Masupe; Themba G. Modise

doi:10.4028/www.scientific.net/AMR.367.125

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 367Linear Conditioning of an NTC Thermistor Using...

Linear Conditioning of an NTC Thermistor Using Nonlinear Operational Amplifier Circuits

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.

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Periodical:

Advanced Materials Research (Volume 367)

Pages:

125-132

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.367.125

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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

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