7.8-to-10.7GHz Reliable-Mode-Switching Series Resonance Oscillator with Bidirectional Inductive-Mode-Pulling Achieving —156.5dBc/Hz Phase Noise and 199.2dBc/Hz FoM<sub>T</sub> at 10 MHz Offset in 40-nm CMOS
This paper proposes a reliable-mode-switching series resonance oscillator with bidirectional inductive-mode-pulling to achieve ultra-low phase noise and wide tuning range, simultaneously. The connection of mode switches are designed to avoid large parasitic capacitance and voltage swing. The bidirectional inductive-pulling transformer is introduced to expand the frequency range of both even and odd modes without reliability risk. Meanwhile, the balanced-slope NMOS inverter is introduced to minimize the common mode ripple and ensure the virtual ground for mode switching. Prototyped in a $40-\mathrm{nm}$ CMOS process, the measured VCO exhibits merits of 31.6% FTR from 7.8 to $10.7 \mathrm{GHz},-156.5 \mathrm{dBc} / \mathrm{Hz}$ phase noise, and $199.2 \mathrm{dBc} / \mathrm{Hz}$ $\mathrm{FoM}_{\mathrm{T}}$ at 10 MHz offset.
Authors
- Yiyang Shu (ORCID: https://orcid.org/0000-0002-6606-9057)
- Xun Luo (ORCID: https://orcid.org/0000-0002-1318-9418)
- Qunwen Leng (ORCID: https://orcid.org/0000-0001-5469-7059)
- Yu Wang (ORCID: https://orcid.org/0000-0001-5971-6597)
Institutions
- University of Electronic Science and Technology of China (CN)
Publication Details
- Published
- 2025-06-15
- DOI
- https://doi.org/10.1109/rfic61188.2025.11082967
- Citations
- 1
- Primary Topic
- Radio Frequency Integrated Circuit Design
- Type
- article
- Field-Weighted Citation Impact
- 0.73
Funders
- National Natural Science Foundation of China
- Natural Science Foundation of Sichuan Province