一种低功耗、高线性、双正交可调谐CMOS上变频混频器  

A Low-Power,High-Linearity and Double-Quadrature Tunable CMOS Up-Conversion Mixer

作　　者：曹奉祥[1] 李永明[1] 孙义和[1] 

机构地区：[1]清华大学微电子研究所,北京100084

出　　处：《微电子学与计算机》2007年第5期166-170,174,共6页Microelectronics & Computer

基　　金：国家自然科学基金项目(60236020;60475018);北京市科技计划项目(D0305003040111)

摘　　要：针对便携式无线发射机的应用,给出了一种低功耗、高线性、双正交可调谐上变频混频器,采用双正交结构降低了电路对正交信号产生器失配的灵敏度,通过调节混频器的增益降低了电路对混频器增益失配的灵敏度,从而可以实现较高的镜像信号抑制。给出了该混频器应用于2.4GHz WLAN的电路拓扑,并使用UMC0.18μm CMOS工艺作了仿真,在1.8V工作电压下,该混频器输出1dB压缩点为3.3dBm,功率转换增益为0.2dB,而功耗只有2.6mW。A low-power, high-linearity double-quadrature tunable up-conversion Mixer is present here for portable application of Wireless transmitter. The sensitivity to mismatches in the quadrature generators is reduced by doublequadrature structure and the sensitivity to mismatches of the conversion gain is also reduced by tunable circuit. The circuit is simulated in UMC 0.18μm CMOS process. At a frequency of 2.4GHz for WEAN application with supply voltage as low as 1.8V, its output ldB compression point （OCP） is 3.3dBm and power conversion gain is 0.2dB while only 2.6mW is consumed.

关 键 词：无线发射机 有源混频器 双正交上变频 可调谐 

分 类 号：TN4[电子电信—微电子学与固体电子学]