A Log Amplifier Based Linearization Scheme for Thermocouples

A Log Amplifier Based Linearization Scheme for Thermocouples

This paper presents a new analog linearization circuit for thermocouple temperature sensors. The proposed circuit employs the linearizing action inherent in logarithmic operation, as well as the ratiometric property of op-amp based logarithmic amplifier compensated against variation in ambient tempe...

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Bibliographic Details
Main Authors: Nikhil MONDAL, A. ABUDHAHIR, Sourav Kanti JANA, Sugata MUNSHI, D. P. BHATTACHARYA
Format: Article
Language:English
Published: IFSA Publishing, S.L. 2009-01-01
Series:Sensors & Transducers
Subjects:
Thermocouple
Temperature-sensor
Linearization
Log-Amplifier
Online Access:http://www.sensorsportal.com/HTML/DIGEST/january_09/P_366.pdf
Description
Summary:This paper presents a new analog linearization circuit for thermocouple temperature sensors. The proposed circuit employs the linearizing action inherent in logarithmic operation, as well as the ratiometric property of op-amp based logarithmic amplifier compensated against variation in ambient temperature. Numerical and PSPICE simulation studies have been carried out using the standard data for T, J and G type thermocouples. Encouraging results have been obtained.
ISSN:2306-8515
1726-5479

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