集成温度传感器的无源UHF RFID标签设计与验证  

Design and Verification of Passive UHF RFID Tag with Integrated Temperature Sensor

作　　者：战金雷 谢生[1] 管坤[1] 毛陆虹[1] 张世林[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072

出　　处：《传感技术学报》2013年第12期1710-1714,共5页Chinese Journal of Sensors and Actuators

基　　金：国家自然科学基金项目(61072010;61372011)

摘　　要：针对超高频EPC C1 Gen-2协议，设计了一款集成温度传感器的无源RFID标签。系统整体构架包括射频模拟前端、数字逻辑控制电路、温度传感电路和EEPROM存储器4部分。通过复用模拟前端电路产生的电流作为温度转换模块的偏置电流，采用时域数字量化法设计出极低功耗的温度传感电路。基于SMIC0．18μm2P4MCMOST艺库的仿真结果表明，所设计温度传感器的功耗仅为100nw。集成温度传感器的RFID标签电路仿真及FPGA验证结果表明，所设计传感标签芯片的测温范围在-20℃-80℃，有效分辨率为0．4℃。A passive RFID tag with an integrated ultra-low-power temperature sensor is designed for the EPC C1 Gen-2 protocol in the UHF frequency band. The sensor tag consists of an analog/RF front-end, a logic control circuit, a temperature sensor circuit, and EEPROM memory in standard CMOS process. Based on the method of digi- talizing and sampling in time-domain, the on-chip temperature sensor is implemented by multiplexing the bias current and clock signal of the analog front-end, and the pulse length associated with temperature is sampled in time-domain and digitalized for thermal sensing. The pre-layout simulation results based on SMIC 0.18μm 2P4M CMOS process indicate that the average power dissipation of temperature sensor is only 100 nW,and the sensor tag has a resolution of 0.4℃ in the range from -20 ℃ to 80 ℃. All the results of either post-simulation or FPGA verifi- cation exhibit that the passive UHF RFID tag has excellent temperature sensor function.

关 键 词：射频识别 传感标签 CMOS 工艺 低功耗 温度传感器 

分 类 号：TP212.9[自动化与计算机技术—检测技术与自动化装置]