A 19.3-to-27.3GHz Area-Reuse Double Dual-Core Complementary Class-F^-1 VCO with Non-Interfering Multiple Resonances Achieving 203.3dBc/Hz FoM_T and 213.3dBc/Hz FoM_TA

In this paper, an area-reuse double dual-core complementary Class- <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathrm{F}^{-1}$</tex> VCO with non-interfering multiple resonances is proposed, which achieves wide FTR, high FoM, and compact chip area, simultaneously. The area-reuse technique with non-interfering multiple resonances ensures the independent operation of double dual-core oscillator, thus broadening the frequency range with a miniaturized chip size. Besides, the proposed oscillator has large <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$2^{\text{nd}}$</tex> harmonic impedance which effectively shapes the waveforms for the phase noise reduction. Prototyped in a 40nm CMOS technology, the VCO has a 34.3% FTR from 19.3 to 27.3 GHz. The peak performance exhibits <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$192.6 \text{dBc} / \text{Hz}$</tex> FoM, <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$203.3 \text{dBc} / \text{Hz}$</tex> FoMt, <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$202.6 \text{dBc} / \text{Hz} \text{FoM}_{\mathrm{A}}$</tex>, and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$213.3 \text{dBc} / \text{Hz}$</tex> FoMta at 10 MHz offset. The variation of FoM at 10 MHz offset is within than <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$0.7 \text{dBc} / \text{Hz}$</tex>, exhibiting a good performance consistency in the wideband range.