用于UHF RFID的高线性度LNA的设计  

Design of High Linearity LNA for UHF RFID Applications

作　　者：谢学刚[1] 冯晓星[1] 王新安[1] 

机构地区：[1]北京大学深圳研究生院集成微系统重点实验室,深圳518055

出　　处：《微电子学》2010年第5期718-722,共5页Microelectronics

摘　　要：设计了一种用于UHF RFID读写器芯片的无电感低噪声放大器。该电路具有单端输入、差分输出的功能,噪声电压在差分输出端相位相同、幅度相等,噪声相互抵消;同时,使非线性项系数为0,提高了线性度。采用TSMC 0.18μm CMOS RF工艺流片,测得在915MHz下噪声系数小于3.2 dB,1dB压缩点为-7dBm,IIP3为3 dBm,S11为-12.8 dB,面积为0.036mm2,功耗小于10mW。An inductorless low noise amplifier（LNA）for UHF RFID was designed,in which the function of a balun was realized.Noise was cancelled by making noise voltages have the same phase and amplitude at differential output nodes,and linearity was improved by removing the third-order distortion.Implemented in TSMC＇s 0.18 μm CMOS RF technology,the LNA was measured to have an NF less than 3.2 dB,a P1dB of-7 dBm,an IIP3 of 3 dBm,and an S11of-12.8 dB.The chip occupies an area of 0.036 mm2 and consumes less than 10 mW of power.

关 键 词：低噪声放大器 RFID 读写器 噪声抵消 

分 类 号：TN722.3[电子电信—电路与系统]