0.1°C accuracy ICO temperature sensor with segmentation algorithm | Zendy

Li Jing | Zendy; Zhou Pengfei | Zendy; Hu Yuanbin | Zendy; Wang Zhaochi | Zendy; Wei Yi | Zendy; Li Chengze | Zendy; Wu Kejun | Zendy; Ning Ning | Zendy

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0.1°C accuracy ICO temperature sensor with segmentation algorithm

Author(s) -

Li Jing,

Zhou Pengfei,

Hu Yuanbin,

Wang Zhaochi,

Wei Yi,

Li Chengze,

Wu Kejun,

Ning Ning

Publication year - 2018

Publication title -

electronics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.375

H-Index - 146

ISSN - 1350-911X

DOI - 10.1049/el.2018.0528

Subject(s) - linearity , temperature measurement , power consumption , power (physics) , segmentation , cmos , change detection , computer science , electronic engineering , algorithm , materials science , engineering , artificial intelligence , physics , quantum mechanics

A real‐time temperature detection circuit with 0.1°C accuracy is presented. The temperature sensor is composed by a current controlled oscillator (ICO). Its oscillating frequency is proportional to the temperature but independent with the power supply. The frequency change will be digitised by a counter and thus realise the temperature detection. The detection accuracy is limited by the linearity of ICO. In order to improve temperature detection accuracy, a temperature segmentation algorithm is proposed. The temperature sensor is implemented with 0.18 μm CMOS technology and the core area is 0.023 mm 2 . The power consumption of the proposed sensor is 0.3 mW with 1.8 V supply. Experimental results show that this sensor can detect the temperature from −40 to 125°C with 0.1°C accuracy and the detection error is within ±0.8°C.

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