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0.1°C accuracy ICO temperature sensor with segmentation algorithm

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

Electronics letters, 2018-05, Vol.54 (11), p.686-687 [Periódico revisado por pares]

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Título:
0.1°C accuracy ICO temperature sensor with segmentation algorithm
Autor: Li, Jing ; Zhou, Pengfei ; Hu, Yuanbin ; Wang, Zhaochi ; Wei, Yi ; Li, Chengze ; Wu, Kejun ; Ning, Ning
Assuntos: Instrumentation and measurement
É parte de: Electronics letters, 2018-05-31, Vol.54 (11), p.686-687
Descrição: 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 mm2. 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.
Editor: The Institution of Engineering and Technology
Idioma: Inglês

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