一种宽带有源前馈噪声消除CMOS低噪声放大器  

A Broadband Active-Feedforward Noise-Cancelling Low-Noise Amplifier

作　　者：樊润伍 郭本青 FAN Runwu;GUO Bengqing(College of Communication Engineering,Chengdu University of Information Technology,Chengdu 610225,China)

机构地区：[1]成都信息工程大学通信工程学院,四川成都610225

出　　处：《成都信息工程大学学报》2025年第2期132-136,共5页Journal of Chengdu University of Information Technology

基　　金：国家自然科学基金资助项目(61871073)。

摘　　要：提出一种单端结构的宽带低噪声放大器。基于传统的共栅和共源噪声消除结构,引入有源前馈电路提升共栅级输入跨导,并降低直流电流,从而负载电阻可以适当增加以降低其噪声输出,保证电路整体更低的噪声指数;同时,提出改进的n/pMOS互补结构方案,有效提高线性度并降低了功耗。为把电路设计成宽带,在输入级和输出级均采用π型匹配网络。使用Cadence Spectre-RF基于TSMC 65 nm CMOS工艺进行仿真。结果显示:在1~12 GHz带宽内,增益为14~17 dB,噪声系数为2.45~3.45 dB;在5 GHz时,IIP3和IIP2的线性度分别为-2.4 dBm和23 dBm;电路仅消耗7.8 mW,芯片面积0.21 mm2。A single-ended broadband low-noise amplifier is proposed.Based on a traditional common-gate and commonsource noise cancellation structure,an active feed-forward stage is used to reduce the DC of the common-gate branch and boost input transconductance.Accordingly,a larger resistive load is allowed to inhibit its noise output and maintain the overall low NF of LNA.Meanwhile,an improved complementary n/pMOS structure is applied to enhance linearity and halve power consumption.For broadband design targets,π-type matching networks are used in both the input stage and the output stage.Cadence Specter-RF is used for simulation based on the TSMC 65 nm CMOS process.The results show a gain of 14-17 dB and a noise figure of 2.45-3.45 dB within a bandwidth of 1-12 GHz.The linearity of IIP3 and IIP2 are-2.4 and 23 dBm at 5 GHz.The circuit consumes only 7.8 mW,the chip area is 0.21 mm2.

关 键 词：宽带 互补配置 低噪声放大器 线性度 噪声消除 

分 类 号：TN722.3[电子电信—电路与系统]