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Design of an Embedded CMOS Temperature Sensor for Passive RFID Tag Chips

This paper presents an ultra-low embedded power temperature sensor for passive RFID tags. The temperature sensor converts the temperature variation to a PTAT current, which is then transformed into a temperature-controlled frequency. A phase locked loop (PLL)-based sensor interface is employed to di...

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Detalles Bibliográficos
Autores principales: Deng, Fangming, He, Yigang, Li, Bing, Zhang, Lihua, Wu, Xiang, Fu, Zhihui, Zuo, Lei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4481890/
https://www.ncbi.nlm.nih.gov/pubmed/25993518
http://dx.doi.org/10.3390/s150511442
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author Deng, Fangming
He, Yigang
Li, Bing
Zhang, Lihua
Wu, Xiang
Fu, Zhihui
Zuo, Lei
author_facet Deng, Fangming
He, Yigang
Li, Bing
Zhang, Lihua
Wu, Xiang
Fu, Zhihui
Zuo, Lei
author_sort Deng, Fangming
collection PubMed
description This paper presents an ultra-low embedded power temperature sensor for passive RFID tags. The temperature sensor converts the temperature variation to a PTAT current, which is then transformed into a temperature-controlled frequency. A phase locked loop (PLL)-based sensor interface is employed to directly convert this temperature-controlled frequency into a corresponding digital output without an external reference clock. The fabricated sensor occupies an area of 0.021 mm(2) using the TSMC 0.18 1P6M mixed-signal CMOS process. Measurement results of the embedded sensor within the tag system shows a 92 nW power dissipation under 1.0 V supply voltage at room temperature, with a sensing resolution of 0.15 °C/LSB and a sensing accuracy of −0.7/0.6 °C from −30 °C to 70 °C after 1-point calibration at 30 °C.
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spelling pubmed-44818902015-06-29 Design of an Embedded CMOS Temperature Sensor for Passive RFID Tag Chips Deng, Fangming He, Yigang Li, Bing Zhang, Lihua Wu, Xiang Fu, Zhihui Zuo, Lei Sensors (Basel) Article This paper presents an ultra-low embedded power temperature sensor for passive RFID tags. The temperature sensor converts the temperature variation to a PTAT current, which is then transformed into a temperature-controlled frequency. A phase locked loop (PLL)-based sensor interface is employed to directly convert this temperature-controlled frequency into a corresponding digital output without an external reference clock. The fabricated sensor occupies an area of 0.021 mm(2) using the TSMC 0.18 1P6M mixed-signal CMOS process. Measurement results of the embedded sensor within the tag system shows a 92 nW power dissipation under 1.0 V supply voltage at room temperature, with a sensing resolution of 0.15 °C/LSB and a sensing accuracy of −0.7/0.6 °C from −30 °C to 70 °C after 1-point calibration at 30 °C. MDPI 2015-05-18 /pmc/articles/PMC4481890/ /pubmed/25993518 http://dx.doi.org/10.3390/s150511442 Text en © 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Deng, Fangming
He, Yigang
Li, Bing
Zhang, Lihua
Wu, Xiang
Fu, Zhihui
Zuo, Lei
Design of an Embedded CMOS Temperature Sensor for Passive RFID Tag Chips
title Design of an Embedded CMOS Temperature Sensor for Passive RFID Tag Chips
title_full Design of an Embedded CMOS Temperature Sensor for Passive RFID Tag Chips
title_fullStr Design of an Embedded CMOS Temperature Sensor for Passive RFID Tag Chips
title_full_unstemmed Design of an Embedded CMOS Temperature Sensor for Passive RFID Tag Chips
title_short Design of an Embedded CMOS Temperature Sensor for Passive RFID Tag Chips
title_sort design of an embedded cmos temperature sensor for passive rfid tag chips
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4481890/
https://www.ncbi.nlm.nih.gov/pubmed/25993518
http://dx.doi.org/10.3390/s150511442
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