A 490GHz 32mW Fully Integrated CMOS Receiver Adopting Dual-Locking FLL

📋 论文概要

该论文提出了一种490GHz、32mW的全集成CMOS接收机，采用双锁定频率锁定环（FLL）来稳定本地振荡器，解决了太赫兹接收机中自由振荡器相位噪声差导致信噪比下降的问题。

💡 主要创新点

• 提出双锁定FLL架构，通过两个锁定环协同工作，有效抑制太赫兹振荡器的相位噪声，提升接收机灵敏度。
• 在490GHz频段实现全集成CMOS接收机，兼顾低功耗（32mW）和高集成度，为低成本太赫兹应用提供可行方案。

🏷 关键词

📄 原文摘要

increasing demand for low-cost, low-power, and high-sensitivity THz receiver. Lately, heterodyne structures in CMOS technologies have been emerging as suitable solutions due to their advantages of low cost, high integration density, and high sensitivity. In order to take advantage of high sensitivity provided by heterodyne receivers, however, local-oscillator (LO) stabilization is essential, since the freerunning oscillator with a poor phase noise [1], which is common in THz oscillators, can significantly degrade the SNR at the IF output. Because of that, reported THz receivers near and above 300GHz employ an external high-power LO source [2,3] or a power-hungry on-chip phase-locked loop (PLL) [4,5], which are undesirable in terms of power consumption and practicality. In addition,

👥 作者与机构

Kyung-Sik Choi1, Dzuhri Radityo Utomo1, Keun-Mok Kim1,

Byeong-Hun Yun1, Sang-Gug Lee1, In-Young Lee2 KAIST, Daejeon, Korea, 2Chosun University, Gwangju, Korea 1 With growing interest in terahertz (THz) imaging, there has been an