A 1.6mW 300mV-Supply 2.4GHz Receiver with -94dBm Sensitivity for Energy-Harvesting Applications

📋 论文概要

该论文设计了一款用于能量收集应用的2.4GHz接收器，采用300mV超低电压供电，功耗仅1.6mW，灵敏度达到-94dBm。通过使用自偏置反相器级联的电流复用IF放大器，克服了极低压头空间限制，实现了高增益与低功耗的平衡。

💡 主要创新点

• 采用两个单端自偏置反相器替代传统OTA作为IF放大器，在严重头空间限制下仍能有效工作。
• 提出电流复用拓扑，同时利用nFET和pFET放大，在相同偏置电流下使跨导和增益加倍。
• 两级全差分增益结构提供共模抑制并有效衰减输入参考失调电压，反相器链实现轨到轨输出。

🏷 关键词

📄 原文摘要

9.3 shows the schematic of the IF-chain. Due to the severe headroom limitation, we used two single-ended self-biased inverters instead of OTAs as IF amplifiers. Compared to a conventional common-source stage, this currentreuse topology that amplifies using both the nFET and pFET doubles the transconductance and gain for the same bias current. Two stages of fully-differential gain provide common-mode rejection and attenuate the input-referred offset voltage of the IF chain to negligible levels. A chain of inverters completes the limiting amplifier and provides a rail-to-rail output. 1 Low power, short-range ISM band transceivers have become extremely important in enabling new applications and have become highly successful commercially. New energy harvesting methodologies will open further applications but demand lower power and supply voltages than currently available chipsets can

👥 作者与机构

Fan Zhang1, Keping Wang1, Jabeom Koo1, Yasunori Miyahara2, Brian Otis1

University of Washington, Seattle, WA, 2Panasonic, Yokohama, Japan Figure 25