A 3.6mW Differential Common-Gate CMOS LNA with Positive-Negative Feedback

📋 论文概要

该论文提出了一种采用正负反馈技术的差分共栅CMOS低噪声放大器（LNA），解决了传统共栅LNA在增益、噪声系数与输入阻抗匹配之间的折中问题。通过正负反馈结构，在3.6mW低功耗下实现了优越的带宽、线性度、稳定性和对PVT变化的鲁棒性。

💡 主要创新点

• 提出正负反馈技术，在不增加功耗的情况下改善共栅LNA的增益和噪声性能，同时保持50Ω输入匹配。
• 采用差分共栅结构，结合正负反馈，增强了电路的带宽、线性度和稳定性。

🏷 关键词

📄 原文摘要

features superior bandwidth, linearity, stability, and robustness to PVT variations compared to a common-source (CS) topology [1]. In spite of these advantages, the dependence of gain and NF on the restricted transconductance (gm) renders this topology unsuitable for various wireless applications. The input impedance of a CG LNA is simplified as 1/gm, and the noise factor is inversely proportional to gm [2]. In order to achieve high gain and low NF, gm should be increased, which deteriorates the 50Ω input impedance matching for a conventional CG LNA. A capacitor-cross-coupled (CCC) negative feedback configuration has been addressed for gm boosting [3]. The architecture, utilizing an inverting gain A, boosts gm to (1+A)gm with an input impedance of 1/(1+A)gm. However, as A is

👥 作者与机构

Sanghyun Woo1, Woonyun Kim1, Chang-Ho Lee2, Kyutae Lim1, Joy Laskar1

Georgia Institute of Technology, Atlanta, GA Samsung RFIC Design Center, Atlanta, GA 1 2 A common-gate (CG) LNA has been widely investigated because it