High performance low power CMOS temperature sensor

Article type: Research Article

Authors: Peng, Hua

Affiliations: School of Electronics and Internet of Things, Chongqing College of Electronic Engineering, Chongqing 401331, China | E-mail: penghua_315@163.com

Correspondence: [*] Corresponding author: School of Electronics and Internet of Things, Chongqing College of Electronic Engineering, Chongqing 401331, China. E-mail: penghua_315@163.com.

Abstract: A temperature sensor based on the combination of a temperature variable oscillator and a linear controlled oscillator is proposed, which can realize temperature detection through the characteristic of frequency changing with temperature. The changing frequency is generated by the two oscillators, and by adjusting the frequency linear change, the linearity of the sensor is also increased. Through the frequency digitizer, the digital signal can be output. Compensation through a process compensator improves the accuracy of the sensor after a single point correction. After conducting tests on 15 experimental samples, the accuracy was achieved within ± 1.2∘C across the temperature range of 0 to 125∘C, demonstrating a highly favorable level of precision.

Keywords: Temperature sensor, energy conversion rate, low power consumption

DOI: 10.3233/JCM-237012

Journal: Journal of Computational Methods in Sciences and Engineering, vol. 23, no. 6, pp. 3447-3460, 2023