A 1.8V CMOS Direct Conversion Receiver for a 900MHz RFID Reader Chip  

一种用于900MHz射频识别(RFID)读写器芯片的1.8V CMOS直接变频接收机(英文)

作　　者：谈熙[1] 刘圆[1] 卢磊[1] 袁路[1] 杨振宇[1] 周嘉业[1] 韩科峰[1] 闵昊[1] 

机构地区：[1]复旦大学专用集成电路及系统国家重点实验室,上海201203

出　　处：《Journal of Semiconductors》2008年第9期1734-1739,共6页半导体学报（英文版）

基　　金：the Science and Technology Commission of Shanghai Municipality(No.057062010);the EU BRIDGE Project(No.033546)~~

摘　　要：A direct conversion receiver with optimized tolerance to local carrier interference is designed and implemented in a 0.18μm 1P6M mixed-signal CMOS process for a 900MHz RFID reader transceiver. A baseband amplifier with series feedback topology is proposed to achieve passive mixer buffering,baseband DC cancellation,and signal amplification simultaneously. The receiver has a measured input ldB compression point of - 4dBm and a sensitivity of - 70dBm when 10dB SNR for digital demodulation is required. The receiver is integrated in a reader transceiver chip and consumes 90mA from a 1.8V supply.设计了针对解决900MHz RFID读写器收发机芯片中本地载波干扰问题而优化的直接变频接收机,并在0.18μm 1P6M混合信号CMOS工艺上实现验证.设计中使用了一种串联反馈结构的基带放大器以达到同时实现无源混频器输出缓冲,直流消除以及信号放大的功能.实际测量显示,该接收机的输入1dB压缩点为-4dBm,当中频信号解调信噪比要求为10dB时,可达到的灵敏度为-70dBm.该接收机与整个收发机集成在同一块芯片中,使用1.8V电源电压,工作时静态电流为90mA.

关 键 词：direct conversion receiver DC cancellation READER RFID 

分 类 号：TN851[电子电信—信息与通信工程]