A 7.6-to-10.3GHz Mode-Switch-Less DM/CM Phase-Flipping Series-Resonance Oscillator Achieving 208.3dBc/Hz FoM TA at 10MHz
Abstract
This paper presents a mode-switch-less phase-flipping series-resonance VCO using dual magnetic-electric coupling paths. It enables continuous control of the tank coupling coefficient from positive to negative, allowing wideband differential and common-mode operations within a single core. A nested transformer provides an optimal inductance ratio and coupling coefficient. Fabricated in 40nm CMOS, the prototype achieves a 30.2% tuning range (7.6-10.3GHz) and -151.3dBc/Hz phase noise at 10MHz offset, yielding a 208.3-dBc/Hz FoMTA.
Fields of Study & Subjects
Radio Frequency Integrated Circuit Design
Acoustic Wave Resonator Technologies
Advancements in PLL and VCO Technologies
Publication details
- Journal / source
- 2026 IEEE Custom Integrated Circuits Conference (CICC)
- Publisher
- IEEE
- Pages
- 1–4
- Publication date
- 19 April 2026