This paper presents a 0.8 ​V supply voltage low noise amplifier (LNA) with high linearity for low power wireless applications. To reduce both second- and third-order intermodulation components (IM2 and IM3), the proposed structure creates equal common-mode (CM) currents with the opposite sign by cascading two differential pairs with a cross-connected output and improves linearity. Using resistive feedback together with noise and distortion canceling technique mutually cancel noise and nonlinearity of both main and auxiliary amplifiers. Combining transformer-based gm-boosting and current reuse techniques makes the presented LNA a superior candidate for low power radios. Detailed analysis and simulations are provided to show the effectiveness of the proposed LNA structure. Simulation results using 65 ​nm CMOS process reveal that the linearized low power LNA achieves over 25 ​dB voltage gain, 2.7 ​dB NF, +10.1 dBm IIP3, and average IIP2 of more than +57 dBm while consuming 870 ​μW.

本文提出了一种适用于低功率无线应用的具有高线性度的0.8V电源电压低噪声放大器（LNA）。为了减少二阶和三阶互调分量（IM2和IM3），所提出的结构通过将两个差分对与交叉连接的输出级联来创建具有相反符号的相等共模（CM）电流，并改善了线性度。将电阻反馈与噪声和失真消除技术一起使用，可以相互消除主放大器和辅助放大器的噪声和非线性。将基于变压器的gm增强技术与电流重用技术相结合，使所提出的LNA成为低功率无线电的最佳候选者。提供详细的分析和仿真以显示所提出的LNA结构的有效性。