一种新型900 MHz下混频器的设计  

Design of a Novel 900 MHz Down-Mixer

作　　者：汪飞[1] 王春华[1] 何海珍[1] 

机构地区：[1]湖南大学计算机与通信学院,长沙410082

出　　处：《微电子学》2010年第4期511-514,519,共5页Microelectronics

基　　金：国家自然科学基金资助项目(60776021);湖南省长沙市科技计划重点项目(K0902012-11)

摘　　要：设计了一种用于超高频射频识别(UHF RFID)读写器的新型低功耗、低噪声、高线性度900 MHz下混频器。在输入端采用2阶交调注入结构,以提高线性度;在输出端采用动态电流注入结构,获得了很好的噪声特性,且具有很高的增益。采用Chartered 0.18 μm标准CMOS模型对电路进行仿真,电路的供电电压为1.2 V。仿真结果表明,设计的900 MHz下混频器增益为11dB,IIP3为-3.5 dBm,噪声为11 dB。A novel 900 MHz down-mixer with low power,low noise and high linearity was designed for UHF RFID reader.In this circuit,a 2nd-order inter-modulation injection structure was employed for input stage to improve linearity,and dynamic current injection structure was used for output stage to eliminate noise and achieve high gain.The circuit was simulated based on Chartered 0.18 μm standard CMOS process at 1.2 V supply voltage.Simulation results showed that the proposed mixer had a gain of 11 dB,an IIP3 of-3.5 dB and an NF of 11 dB.

关 键 词：超高频 射频识别 混频器 

分 类 号：TN773[电子电信—电路与系统]