A 0.08mm2 25.5-to-29.9GHz Multi-Resonant-RLCM-Tank VCO Using a Single-Turn Multi-Tap Inductor and CM-Only Capacitors Achieving 191.6dBc/Hz FoM and 130kHz 1/f3 PN Corner

📋 论文概要

本文提出一种基于多谐振RLCM-tank的VCO，采用单圈多抽头电感和CM-only电容器，实现了25.5-29.9GHz的频率范围。该设计通过2次谐波共振有效抑制闪烁噪声上转换，优化了相位噪声性能。

💡 主要创新点

• 利用多谐振RLCM-tank结构重塑VCO相位噪声的脉冲灵敏度函数（ISF），改善近载波相位噪声。
• 首次采用单圈多抽头电感实现紧凑的多谐振网络，仅0.08mm²芯片面积。
• 全部采用CM-only电容（仅使用CMOS电容），避免额外工艺步骤。

🏷 关键词

📄 原文摘要

Instituto Superior Tecnico/University of Lisboa, Lisbon, Portugal 1 2 VCO designs have evolved from single-resonant LC-tank VCOs to the recent multiresonant RLCM (Resistor-Inductor-Capacitor-Mutual-inductance) tank VCOs that allow reshaping of VCO phase-noise (PN) impulse sensitivity function (ISF). Two recent RF VCOs [1,2] exploited the 2nd-harmonic resonance to impede the flickernoise upconversion, achieving an FoM@1MHz of up to 195.4dBc/Hz (Fig. 26.2.1). Specifically, the RLCM tank in [1] tailors a multi-turn inductor with a positive mutual coupling factor (k>0) to generate an implicit common-mode (CM) resonance at 2× the oscillation frequency (FOSC). Yet, the CM resonance has a quality factor (Q) that is ~50% of its differential-mode (DM) counterpart, due to partial magnetic-flux cancellation within the multi-turn inductor. In [2], the transformer-based RLCM tank offers two intrinsically high-Q resonances at FOSC

👥 作者与机构

Hao Guo1, Yong Chen1, Pui-In Mak1, Rui P. Martins1,2

University of Macau, Macau, China