Paper Info
Title
A 5.0-To-6.36ghz Wideband-Harmonic-Shaping Vco Achieving 196.9dbc/Hz Peak Fom And 90-To-180khz 1/F(3) Pn Corner Without Harmonic Tuning
Abstract
Since 2001 [1], LC VCOs have been demonstrating significant improvements of figureof-merit (FoM) and 1/f phase noise (PN) corner [2–5] by exploring common-mode (CM) resonance at twice the oscillation frequency $\\left(2 F_{0 s c}\\right)$. In addition, for area reduction, the shaping of the impulse sensitivity function (ISF) has evolved from explicit with two coils [1] to implicit with one coil [2]. Yet, as depicted in Fig. 20.1.1, the latter suffers from large CM magnetic-flux cancellation, resulting in a much lower CM impedance $\\left|Z_{c M}\\right|$ that is $\\sim 0.64$ of its differential-mode (DM) impedance $\\left|Z_{D M}\\right|$. The VCO in [3] achieves a high FoM $_{\\circledast 10 \\mathrm{M}+\\mathrm{z}}$ up to $191.4 \\mathrm{dBc} / \\mathrm{Hz}$ by boosting $\\left|\\mathrm{Z}_{\\mathrm{CM}}\\right|$ at $2 \\mathrm{~F}_{0 \\mathrm{sc}}$ and $\\left|\\mathrm{Z}_{\\mathrm{DM}}\\right|$ at $3 \\mathrm{~F}_{{osc. }}$ Yet, to uphold an optimal performance over the tuning range (TR), the VCO in [3]still requires manual harmonic tuning for aligning the $1^{{st }}-t 0-2^{{nd }}$ and $1^{{st }-t 0-3^{{d }} { harmonic resonances. This }}$ denotes a narrowband effect. For the VCO in [4], which features a four-winding transformer with no harmonic tuning, there is a large variation of FoM $_{\\circledast 10 \\mathrm{MHz}}(190.7 \\mathrm{t} \\mathrm{t}$ $196.5 \\mathrm{dBc} / \\mathrm{Hz}$) and 1/f PN corner (60 to 600kHz) across the TR.
Year
DOI
Venue
2021
10.1109/ISSCC42613.2021.9365761
2021 IEEE INTERNATIONAL SOLID-STATE CIRCUITS CONFERENCE (ISSCC)
DocType
Volume
ISSN
Conference
64
0193-6530
Citations 
PageRank 
References 
0
0.34
0
Authors
4
Name
Order
Citations
PageRank
Hao Guo171.08
Yong Chen2115.01
Peng Un Mak330165.06
Rui Paulo Martins4437.21