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Volume 11
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10.3390/mi11020124
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Article

A CMOS-Thyristor Based Temperature Sensor with +0.37 °C/−0.32 °C Inaccuracy

by
Jing Li
*,
Yuyu Lin
,
Siyuan Ye
,
Kejun Wu
,
Ning Ning
and
Qi Yu
University of Electronic Science and Technology of China, Chengdu 610054, China
*
Author to whom correspondence should be addressed.
Micromachines 2020, 11(2), 124; https://doi.org/10.3390/mi11020124
Submission received: 12 December 2019 / Revised: 14 January 2020 / Accepted: 21 January 2020 / Published: 22 January 2020
(This article belongs to the Special Issue Temperature Sensors—Fundamentals, Detectors, Arrays and Applications)
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Abstract

This paper describes a voltage controlled oscillator (VCO) based temperature sensor. The VCOs are composed of complementary metal–oxide–semiconductor (CMOS) thyristor with the advantage of low power consumption. The period of the VCO is temperature dependent and is function of the transistors’ threshold voltage and bias current. To obtain linear temperature characteristics, this paper constructed the period ratio between two different-type VCOs. The period ratio is independent of the temperature characteristics from current source, which makes the bias current generator simplified. The temperature sensor was designed in 130 nm CMOS process and it occupies an active area of 0.06 mm2. Based on the post-layout simulation results, after a first-order fit, the sensor achieves an inaccuracy of +0.37/−0.32 °C from 0 °C to 80 °C, while the average power consumption of the sensor at room temperature is 156 nW.
Keywords: temperature sensor; CMOS thyristor; VCO temperature sensor; CMOS thyristor; VCO

Share and Cite

MDPI and ACS Style

Li, J.; Lin, Y.; Ye, S.; Wu, K.; Ning, N.; Yu, Q. A CMOS-Thyristor Based Temperature Sensor with +0.37 °C/−0.32 °C Inaccuracy. Micromachines 2020, 11, 124. https://doi.org/10.3390/mi11020124

AMA Style

Li J, Lin Y, Ye S, Wu K, Ning N, Yu Q. A CMOS-Thyristor Based Temperature Sensor with +0.37 °C/−0.32 °C Inaccuracy. Micromachines. 2020; 11(2):124. https://doi.org/10.3390/mi11020124

Chicago/Turabian Style

Li, Jing, Yuyu Lin, Siyuan Ye, Kejun Wu, Ning Ning, and Qi Yu. 2020. "A CMOS-Thyristor Based Temperature Sensor with +0.37 °C/−0.32 °C Inaccuracy" Micromachines 11, no. 2: 124. https://doi.org/10.3390/mi11020124

APA Style

Li, J., Lin, Y., Ye, S., Wu, K., Ning, N., & Yu, Q. (2020). A CMOS-Thyristor Based Temperature Sensor with +0.37 °C/−0.32 °C Inaccuracy. Micromachines, 11(2), 124. https://doi.org/10.3390/mi11020124

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