高增益高线性度CMOS偶次谐波混频器设计  

Design of a CMOS Even Harmonic Mixer with High Gain and High Linearity

作　　者：程知群[1] 高俊君[1] 朱雪芳[1] 徐胜军[1] 

机构地区：[1]杭州电子科技大学射频电路与系统教育部重点实验室,杭州310018

出　　处：《电子器件》2010年第3期286-289,共4页Chinese Journal of Electron Devices

基　　金：国家自然科学基金资助项目(60776052)

摘　　要：设计了一种能应用于GPS接收机的偶次谐波混频器,在RF输入端采用了电流复用电路提高混频器的转换增益和线性度,在LO输入端采用了倍频技术。同时,该拓扑结构还具有低功耗的优点。仿真结果表明:在1.8V电源电压下,RF频率1.575GHz,LO频率0.7895 GHz,LO功率为-5 dBm时,该混频器的转换增益为20.848 dB,三阶交调截至点为-2.297 dBm。表现出了高增益、高线性度的性能。An even harmonic mixer applied to GPS receiver is designed.The proposed mixer employs a current reuse circuit in the RF input stage to improve its linearity and conversion gain,and uses the double frequency technique in the LO input stage,respectively.In addition,the proposed topology also has the advantages of low power consumption.The simulated results reveal that the proposed mixer has a conversion gain of 20.848 dB,third-order input intercept point（IIP3） of-2.297 dBm,under the supply voltage of 1.8 V,RF input frequency of 1.575GHz,LO input frequency of 0.789 5 GHz and LO power of-5 dBm.It shows high conversion gain and high linearity.

关 键 词：电流复用技术 倍频技术 偶次谐波混频器 CMOS 

分 类 号：TN4[电子电信—微电子学与固体电子学]