A highly linear CMOS temperature sensor

In this work, we proposed a linear CMOS temperature-to-current converter as a temperature sensor, which especially benefit on enhancing the accuracy of thermal monitoring. The proposed design achieves highly linear relationship between temperature and current by annulling the most critical nonlinear...

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Bibliographic Details
Published inThe 8th Electrical Engineering/ Electronics, Computer, Telecommunications and Information Technology (ECTI) Association of Thailand - Conference 2011 pp. 74 - 77
Main Authors Chun Wei Lin, Sheng Feng Lin
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2011
Subjects
Equations
Fabrication
mobility degradation
Monitoring
Temperature measurement
temperature sensor
Temperature sensors
temperature-to-current converter
Thermal analysis
Thermal degradation
thermal monitoring
threshold voltage drift
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Summary:In this work, we proposed a linear CMOS temperature-to-current converter as a temperature sensor, which especially benefit on enhancing the accuracy of thermal monitoring. The proposed design achieves highly linear relationship between temperature and current by annulling the most critical nonlinear square terms of it. Through utilizing a compensation scheme among two current sources driven in saturation region with different bias voltages, the nonlinear effect originated from the temperature dependence of both mobility degradation and threshold voltage drift is cancelled. The experiment results demonstrate competitive performance. The maximum temperature error and average power consumption of temperature sensor are merely ±0.022°C and 137.6μW respectively while the die area is about 27.1μm*18.3μm under the implementation of TSMC 0.35μm CMOS process with 3.3V power supply.
ISBN:1457704250
9781457704253
DOI:10.1109/ECTICON.2011.5947774