An Inverse-Class-F CMOS VCO with Intrinsic-High-Q 1st- and 2nd-Harmonic Resonances for 1/f2-to-1/f3 Phase-Noise Suppression Achieving 196.2dBc/Hz FOM

📋 论文概要

该论文提出了一种逆F类CMOS VCO，通过内在高Q的基波和二次谐波谐振来抑制1/f^2到1/f^3相位噪声。相比传统的显式或隐式二次谐波共模谐振设计，该结构无需额外尾谐振腔，实现了更优的相位噪声性能。

💡 主要创新点

• 提出逆F类VCO结构，利用基波和二次谐波谐振实现相位噪声抑制。
• 内在高Q谐振设计，无需额外尾谐振腔，简化了电路结构。
• 有效抑制1/f^2到1/f^3相位噪声，提升了振荡器的近载波相位噪声性能。

🏷 关键词

📄 原文摘要

Rui P. Martins1,3 University of Macau, Macau, China University of Malaya, Kuala Lumpur, Malaysia 3 Instituto Superior Tecnico/University of Lisboa, Lisbon, Portugal 1 2 Second-harmonic common-mode (CM) resonance has been explored for LC oscillators to improve their phase noise (PN) in the past. Its implementation evolves from an explicit design [1] that relies on an extra tail tank, to a recent implicit design [2], where the resonator itself offers a CM impedance peak at 2× the oscillation frequency (FLO): Explicit design (Fig. 23.5.1-upper): a high-Q tail tank (QTAIL) is desirable to raise its impedance |ZTAIL| at 2FLO and to prevent the loss of LTAIL from penalizing the PN in the 1/f2 region [3]. To compare with the theoretical limit (FOMMAX), the FOM in the 1/f2 PN region is plotted against LTAIL at different QTAIL. Closing the gap between FOMMAX and FOM imposes an excessive QTAIL of 20 or beyond, which can

👥 作者与机构

Chee-Cheow Lim1,2, Jun Yin1, Pui-In Mak1, Harikrishnan Ramiah2,