Low noise amplifier architecture based on noise cancellation

被引：0
|
作者：
Yao R. [1 ]
Xu Z. [1 ]
机构：
[1] School of Electronic and Information Engineering, South China University of Technology, Guangzhou
来源：
Huazhong Keji Daxue Xuebao (Ziran Kexue Ban)/Journal of Huazhong University of Science and Technology (Natural Science Edition) | 2020年 / 48卷 / 09期
关键词：
Cross-coupling; Gain-boosting; Low noise amplifier; Noise cancellation; Wideband;
D O I：
10.13245/j.hust.200914
中图分类号：
学科分类号：
摘要：
A broadband low noise amplifier (LNA) architecture based on noise cancellation and substrate cross-coupling technique was presented.Based on the noise cancellation structure combined with common gate (CG) and shunt feedback, substrate bias and substrate cross-coupling technique was adopted in this LNA architecture to increase the equivalent transconductance of the input stage, the cancellation rate in the noise cancellation path was improved, and the noise figure of the circuit was reduced.Based on the noise cancellation principle, the passive gain-boosting method was adopted on the substrate of the input transistor to increase the input stage transconductance＇s degree of freedom, and the mutual restriction between the input matching and noise figure of the original structure was improved.Based on kirchhoff current formula of nodes in LNA architecture, the gain, input matching and noise figure of the new architecture were analyzed.Compared with the existing noise cancellation structure, the LNA architecture reduced the noise figure by 13.3% by using the substrate cross-coupling technique. © 2020, Editorial Board of Journal of Huazhong University of Science and Technology. All right reserved.
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页码：82 / 88
页数：6
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