传感技术学报2012，Vol.25Issue(4)：462-467,6.DOI:10.3969/j.issn.1004-1699.2012.04.009
集成于无源UHF RFID标签的高分辨率CMOS温度传感器
A High-Resolution CMOS Temperature Sensor Integrated in Passive UHF RFID Tag
摘要
Abstract
This article presents a high-resolution CMOS temperature sensor architecture integrated in passive UHF RFID tag. The architecture uses the method of digitalizing and sampling in time-domain. APTAT ( Proportional to absolute temperature) current source and the oscillator inside the tag compose a FT AT oscillator, which generates a pulse whose period is related with absolute temperature. This pulse will be the clock signal of a counter. Within the range of -50 °C ~ 50°C, the period of the pulse is from 1.841 us to 0.426 us. Also, the design uses a digital circuit to deal with the preamble command in order to get a pulse whose period is 200 (is and is absolutely not affected by absolute temperature. This pulse will be the enable signal of the same counter. By means of sampling and counting, we get digital signal with temperature information. The design uses 0. 18 um UMC CMOS process,the supply voltage is 1. 8 V,the DC power dissipation is 789nW,and the post-simulation effective resolution is 0. 332 LSB/°C.关键词
无源RFID/温度传感器/高分辨率/CMOS工艺Key words
passive UHF RFID/temperature sensor/high-resolution/CMOS process分类
信息技术与安全科学引用本文复制引用
王倩,毛陆虹,张欢,张世林,谢生..集成于无源UHF RFID标签的高分辨率CMOS温度传感器[J].传感技术学报,2012,25(4):462-467,6.基金项目
国家自然科学基金项目(61072010) （61072010）
国家高技术研究发展计划项目(2008AA04A102) （2008AA04A102）
