一种改进的高线性CMOS混频器的分析与设计  

Analysis and Design of an Improved High Linearity CMOS Mixer

作　　者：张雷鸣[1] 张金灿[1] 刘博[1] 

机构地区：[1]河南科技大学电气工程学院,河南洛阳471023

出　　处：《微电子学》2016年第2期219-223,共5页Microelectronics

基　　金：国家自然科学基金资助项目(611101167);2014年河南省教育厅基础与前沿技术研究资助项目(14B510004);河南省高等学校重点科研项目(15A510001)

摘　　要：在多标准系统应用中,由于线性度和噪声的要求,使得混频器的设计难度很大。采用2次谐波注入结构的3阶失真抵消技术,设计了一种改善跨导级线性度的高线性CMOS混频器。在混频器开关级处引入LC滤波电路,抵消了开关级晶体管的2阶和3阶互调失真,进而优化了开关级的线性度。采用TSMC 0.13μm CMOS工艺进行设计与仿真,并完成了版图设计与流片。较之传统的吉尔伯特混频器,该电路的输入3阶交调点IIP3增加了11.2dBm,达到9.2dBm的高线性度,对噪声系数、增益以及功耗造成的影响较小。The requirements of linearity and noise in multi-standard applications make the design of mixers so challenging and difficult.A new highly linear CMOS mixer was proposed which utilized the third-order distortion cancellation mechanisms by using the second harmonic injection technique.This mixer could offset the second-and the third-order intermodulation distortions with an LCfilter in the switching stage,and could optimize the linearity of the switching stage.The simulations and tape-out were made with the TSMC 0.13μm CMOS model technology.Results demonstrated that the IIP3 of the proposed mixer had an increase of 11.2dBm in comparison with the conventional Gilbert-type mixer,and the linearity achieved 9.2dBm.The change of NF and gain were indistinct.

关 键 词：CMOS混频器 3阶失真抵消技术 高线性 

分 类 号：TN432[电子电信—微电子学与固体电子学] TN773