In this letter, a dual-mode rotary traveling-wave oscillator (RTWO) is proposed to achieve wide operation bandwidth and multiple phases. Two twisted differential transmission lines are coupled together to form the dual-mode traveling-wave resonator. Sixteen pairs of back-to-back inverters and capacitors are connected to the resonators to introduce the multicore multi-phase operation. The mode switches are used to control the coupling direction and select the desired mode without degrading the quality factor. Verified in a 40-nm CMOS process, the proposed dual-mode RTWO exhibits a dual-mode frequency range from 19.1 to 25.5 GHz with the core size of 0.08 mm 2^{\textbf {2}} . The measured 10-MHz phase noise at 25.30 and 22.12 GHz is −129.6 and −131.5 dBc/Hz, respectively. The best FoM and FoMT are 186.2 and 195.4 dBc/Hz, respectively.

中文翻译：

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具有 195.4dBc/Hz FoM 的 19.1"25.5GHz 紧凑型双模旋转行波振荡器


在这封信中，提出了一种双模旋转行波振荡器（RTWO），以实现宽工作带宽和多相位。两条绞合差分传输线耦合在一起形成双模行波谐振器。十六对背对背逆变器和电容器连接到谐振器以引入多核多相操作。模式开关用于控制耦合方向并选择所需的模式，而不会降低品质因数。所提出的双模 RTWO 在 40 nm CMOS 工艺中进行了验证，其双模频率范围为 19.1 至 25.5 GHz，核心尺寸为 0.08 mm 2^{\textbf {2}} 。在 25.30 和 22.12 GHz 处测得的 10 MHz 相位噪声分别为 -129.6 和 -131.5 dBc/Hz。最佳 FoM 和 FoMT 分别为 186.2 和 195.4 dBc/Hz。