CMOS有源混频器噪声的分析与仿真  

Analysis and Simulation of Noise in CMOS Active Mixers

作　　者：李晓磊[1] 郭本青[1] 

机构地区：[1]电子科技大学电子工程学院,成都611731

出　　处：《微电子学》2011年第2期315-318,共4页Microelectronics

基　　金：国家自然科学基金资助项目(NSFC60688101)

摘　　要：基于线性时变理论,对有源CMOS混频器的噪声特性进行系统的分析。引入冲击敏感函数(ISF)来解释混频器噪声的周期性,进而推导其线性时变冲击响应解析式,并获得噪声系数的显式表达式。理论合理地阐明了混频器噪声的周期叠加机理,仿真结果验证了理论推导。Noise characteristics of active CMOS mixers were systematically analyzed based on linear time-varying theory.Impulse sensitivity function（ISF） was introduced to explain the periodicity of mixer and derive its linear time-varying impulse response formula.Also,explicit expressions of the output noise and noise figure were presented.Mechanism of noise transformation in mixers was elaborated,and the derivation was validated by simulation results.

关 键 词：有源混频器 噪声 线性时变系统 冲击敏感函数 

分 类 号：TN773[电子电信—电路与系统]