论文信息 - A novel ultra low power temperature sensor for UHF RFID tag chip

A novel ultra low power temperature sensor for UHF RFID tag chip

A novel ultra low power temperature sensor for UHF RFID tag chip is presented. The sensor consists of a constant pulse generator, a temperature related oscillator, a counter and a bias. Conversion of temperature to digital output is fulfilled by counting the number of the clocks of the temperature related oscillator in a constant pulse period. The sensor uses time domain comparing, where high power consumption bandgap voltage references and traditional ADCs arc not needed. The sensor is realized in a standard 0.18 mum CMOS process, and the area is only 0.2 mm2. The accuracy of the temperature sensor is plusmn1degC after calibration. The power consumption of the sensor is only 0.9 muW.

[1] Hoi-Jun Yoo,et al. A 8-µW, 0.3-mm2 RF-powered transponder with temperature sensor for wireless environmental monitoring , 2005, ISCAS.

[2] David A. Johns,et al. Analog Integrated Circuit Design , 1996 .

[3] Hoi-Jun Yoo,et al. A 5.1-/spl mu/W UHF RFID tag chip integrated with sensors for wireless environmental monitoring , 2005, Proceedings of the 31st European Solid-State Circuits Conference, 2005. ESSCIRC 2005..

[4] Apinunt Thanachayanont,et al. Self-powered wireless temperature sensors exploit RFID technology , 2006, IEEE Pervasive Computing.

[5] Alan B. Grebene,et al. Analog Integrated Circuit Design , 1978 .