A Fundamental 9.9-to-30GHz 207dBc/Hz FoMT Quad-Core Quad-Mode VCO Utilizing One-Coil-For-All Mechanism in 40nm CMOS

This paper presents a 9.9-to-30.0 GHz quad-core quad-mode voltage-controlled-oscillator (VCO) employing a symmetric 2D folded 8-shaped inductor and a Triple-Peak-Common-Mode-Resonator (TPCR) within a single inductor coil. Measurement results demonstrate a continuous and uniform frequency tuning range (FTR) of 101% across four modes, with phase noise (PN) of -128.6 to -135.8 dBc/Hz at a 10 MHz offset. The design achieves a peak FoMT of 206.9 dBc/Hz and a peak FoMTA of 218.1 dBc/Hz at a 10MHz offset.