Fig. 1.
(Color online) Proposed battery-free wireless temperature sensing chipset.
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Journal of Semiconductors
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2025
> Accepted Manuscript
| Citation: |
Jiayi Wang, Haoyang Li, Weixiao Wang, Tianying Fang, Jiaqing Li, Yuxuan Luo, Bo Zhao. A battery-free wireless temperature sensing chipset implemented by 55 nm and 65 nm CMOS process[J]. Journal of Semiconductors, 2025, In Press. doi: 10.1088/1674-4926/25010028
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J Y Wang, H Y Li, W X Wang, T Y Fang, J Q Li, Y X Luo, and B Zhao, A battery-free wireless temperature sensing chipset implemented by 55 nm and 65 nm CMOS process[J]. J. Semicond., 2025, accepted doi: 10.1088/1674-4926/25010028
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A battery-free wireless temperature sensing chipset implemented by 55 nm and 65 nm CMOS process
DOI: 10.1088/1674-4926/25010028
CSTR: 32376.14.1674-4926.25010028
More Information-
Jiayi Wang (Student Member, IEEE) received the B.S. degree in electronic information engineering from the Chongqing University, Chongqing, China, in 2022. She is currently pursuing the M.Sc. degree in electronic science and technology with the College of Integrated Circuits, Zhejiang University, Hangzhou, China. Her research interests include analog/mixed-signal IC design and wireless power/data transmission circuit design for IoT devices -
Bo Zhao (Senior Member, IEEE) received the Ph.D. degree from the Department of Electronic Engineering, Tsinghua University, Beijing, China, in 2011. From 2013 to 2015, he was a Research Fellow with the National University of Singapore, Singapore. From 2015 to 2018, he was an Assistant Project Scientist with Berkeley Wireless Research Center, Department of Electrical Engineering and Computer Sciences, University of California at Berkeley, Berkeley, CA, USA. Since 2018, he has been a Professor with the Institute of VLSI Design, Zhejiang University, Hangzhou, China. His research interests include IoT radios, wireless power transfer, and wearable/implantable radios - Corresponding author: zhaobo@zju.edu.cn
- Revised Date: 2025-04-08 Available Online: 2025-04-18
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Abstract
In the applications such as food production, the environmental temperature should be measured continuously during the entire process, which requires an ultra-low-power temperature sensor for long-termly monitoring. Conventional temperature sensors trade the measurement accuracy with power consumption. In this work, we present a battery-free wireless temperature sensing chip for long-termly monitoring during food production. A calibrated oscillator-based CMOS temperature sensor is proposed instead of the ADC-based power-hungry circuits in conventional works. In addition, the sensor chip can harvest the power transferred by a remote reader to eliminate the use of battery. Meanwhile, the system conducts wireless bidirectional communication between the sensor chip and reader. In this way, the temperature sensor can realize both a high precision and battery-free operation. The temperature sensing chip is fabricated in 55 nm CMOS process, and the reader chip is implemented in 65 nm CMOS technology. Experimental results show that the temperature measurement error achieves ±1.6 °C from 25 to 50 °C, with battery-free readout by a remote reader. -
References
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