Active Feedback Receiver with Integrated Tunable RF

📋 论文概要

该论文提出了一种基于主动反馈的接收机架构，集成了可调谐RF通道选择功能，通过无源混频器的阻抗变换实现高Q信道选择，同时采用失真抵消技术。解决了宽带和认知无线电应用中的线性度和灵活性需求，实现了48dB阻带抑制和大于+12dBm的宽带IIP3。

💡 主要创新点

• 创新点1：提出主动反馈接收机结构，利用无源混频器的阻抗变换特性实现集成可调高Q RF通道选择。
• 创新点2：采用失真抵消技术，在保持高线性度的同时实现宽带干扰抑制。
• 创新点3：在65nm CMOS工艺中实现了极小的芯片面积（<0.06mm²），兼顾性能与紧凑度。

🏷 关键词

📄 原文摘要

Stopband Rejection and >+12dBm Wideband IIP3, Occupying <0.06mm2 in 65nm CMOS Shadi Youssef, Ronan van der Zee, Bram Nauta University of Twente, Enschede, The Netherlands The impedance transformation property of passive mixers enables integrated high-Q channel selection at RF with a programmable center frequency through a clock [1,2]. As such, this technique is suitable for addressing both linearity and flexibility requirements in wideband and cognitive radio applications. However, given the typically low resistance level at the RF side of the receiver chain, the RC product necessary for filtering results in large capacitors, and, consequently, large die area that does not scale with technology. In addition, filter rejection at the RF side is limited by the resistance of the switches of the passive mixer. Thus, large switches are typically needed for moderate rejection values (5Ω switches for 16dB rejection [2]), which translates to higher power consumption

👥 作者与机构

Channel Selectivity, Distortion Cancelling, 48dB