Analysis and Design of a Low-Cost RFID Tag Analog Front-End  

低成本射频识别标签模拟前端分析与设计(英文)

作　　者：王肖[1] 田佳音[1] 闫娜[1] 闵昊[1] 

机构地区：[1]复旦大学专用集成电路与系统国家重点实验室,上海201203

出　　处：《Journal of Semiconductors》2008年第3期510-515,共6页半导体学报（英文版）

摘　　要：A new,low-cost RFID tag analog front-end compatible with ISO 14443A and ISO 14443B is presented. By substituting conventional multi-circle antenna with single-circle antenna, the package cost of the tag is greatly reduced. Based on this exasperate antenna performance,a new rectifier with high power conversion efficiency and low turn-on voltage is presented. The circuit is implemented in an SMIC 0.18μm EEPROM process. Measurement results show that with a 120kΩ load,the power conversion efficiency reaches as high as 36%. For a sinusoidal wave with magnitude of 0. 5V, the output DC voltage reaches IV,which is high enough for RFID tags. The read distance is as far as 22cm.提出一种新的低成本射频识别标签模拟前端,同时兼容ISO14443A和ISO14443B协议.相比于传统模拟前端,本设计采用面积更小的单线圈天线代替传统大面积多圈天线,使得标签的封装成本大幅度降低.考虑到单线圈天线的性能降低,设计了一个新的具有高效率低启动电压的电荷泵整流电路.整体电路采用SMIC0.18μmEEPROM工艺实现,测试结果显示电荷泵驱动120kΩ等效负载时,整流效率达到36%,输入交流幅度仅0.5V时,输出电压达到电路工作电压1V.标签的阅读距离可以达到22cm.

关 键 词：RFID analog front-end charge pump low power low voltage single-circle antenna 

分 类 号：TP391.44[自动化与计算机技术—计算机应用技术]