An Analog Front-End Using Feedback Compensation Technique for Thermistor Linearization

被引：0

作者：

Mathew, Thomaskutty ^{[1
]}

Sharma, Manvendra ^{[1
]}

Sontakke, British Ashok ^{[2
]}

Anoop, C. S. ^{[1
]}

机构：

[1] Indian Inst Space Sci & Technol, Dept Avion, Thiruvananthapuram, Kerala, India

[2] Semicond Lab SCL, MEMS Fabricat Div, Sahibzada Ajit Singh Nag, India

来源：

2022 IEEE 19TH INDIA COUNCIL INTERNATIONAL CONFERENCE, INDICON | 2022年

关键词：

Circuit Design; Feedback Compensation; Front-End Circuits; Linearization; Non-Linear Sensors; Signal conditioning; Thermistors;

D O I：

10.1109/INDICON56171.2022.10040033

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Thermistors are widely employed for temperature sensing in a number of industrial scenarios. The transfer characteristics of thermistor follows a nonlinear curve. This paper proffers a simple analog front-end circuit that can linearize thermistor characteristics. The front-end operates based on a dual-mode feedback compensation principle. The design and optimization of the front-end is discussed in the paper. The frontend, equipped with the optimized values for passive components, can render a non-linearity as low as 0.35% for a wide temperature range. The effect of drift and tolerance of optimization variables are analysed. Further, the efficacy of the front-end has been established using simulation and experimental studies with thermistor characteristics. Experimental results of the developed thermistor front-end gives a non-linearity of 0.57% over a temperature span of 120 degrees C.

引用

页数：6

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