A 2.4GHz 65nm CMOS Mixer-First Receiver Using 4-Stage Cascaded Inverter-Based Envelope-Biased LNAs Achieving 66dB In-Band Interference Tolerance and -83dBm Sensitivity

📋 论文概要

提出了一种采用4级级联反相器包络偏置LNA的2.4GHz混频器优先接收机，通过非线性抑制技术放大弱信号并抑制强带内干扰，解决了ISM频段密集共存环境下的带内干扰问题。

💡 主要创新点

• 采用4级级联反相器实现包络偏置LNA，无需额外偏置电路，降低功耗和面积。
• 混频器优先架构结合非线性抑制，实现了对强带内干扰的耐受性，无需前端BAW/SAW滤波器。

🏷 关键词

📄 原文摘要

Intensive interest in internet-of-things devices has crowded the ISM bands (e.g., 2.4GHz). A robust receiver for each wireless link in such a coexistence environment is required not only to have high rejection of out-of-band interference but also to tolerate strong in-band interference, which cannot be filtered out by the front-end BAW/SAW devices. Recently, nonlinear suppressors [1,2] have been demonstrated to amplify a weak desired signal while suppressing strong interferers. In contrast to conventional frequency-dependent techniques, which consume high power to implement high-Q filtering [3-6], the nonlinear suppressor is frequency independent and only needs the envelope information of the interferer to adjust the nonlinear transfer function for interference suppression, reducing power consumption. On the other hand, unlike traditional linear receivers, in particular mixer-first receivers, which require high power to lower LO phase noise

👥 作者与机构

Dawei Ye1, Rongjin Xu1, C.-J. Richard Shi1,2

Fudan University, Shanghai, China; 2University of Washington, Seattle, WA