Design of an Embedded CMOS Temperature Sensor for Passive RFID Tag Chips
AbstractThis 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 mm2 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. View Full-Text
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Deng, F.; He, Y.; Li, B.; Zhang, L.; Wu, X.; Fu, Z.; Zuo, L. Design of an Embedded CMOS Temperature Sensor for Passive RFID Tag Chips. Sensors 2015, 15, 11442-11453.
Deng F, He Y, Li B, Zhang L, Wu X, Fu Z, Zuo L. Design of an Embedded CMOS Temperature Sensor for Passive RFID Tag Chips. Sensors. 2015; 15(5):11442-11453.Chicago/Turabian Style
Deng, Fangming; He, Yigang; Li, Bing; Zhang, Lihua; Wu, Xiang; Fu, Zhihui; Zuo, Lei. 2015. "Design of an Embedded CMOS Temperature Sensor for Passive RFID Tag Chips." Sensors 15, no. 5: 11442-11453.