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An inverse-class-F CMOS VCO with intrinsic-high-Q 1st- and 2nd-harmonic resonances for 1/f2-to-1/f3 phase-noise suppression achieving 196.2dBc/Hz FOM
Chee-Cheow Lim1,2; Jun Yin1; Pui-In Mak1; Harikrishnan Ramiah2; Rui P. Martins1,3
2018
Conference Name65th IEEE International Solid-State Circuits Conference (ISSCC)
Source Publication2018 IEEE International Solid - State Circuits Conference - (ISSCC)
Pages374-376
Conference DateFEB 11-15, 2018
Conference PlaceSan Francisco, CA
Abstract

Second-harmonic common-mode (CM) resonance has been explored for LC oscillators to improve their phase noise (PN) in the past. Its implementation evolves from an explicit design [1] that relies on an extra tail tank, to a recent implicit design [2], where the resonator itself offers a CM impedance peak at 2x the oscillation frequency (F): Explicit design (Fig. 23.5.1-upper): a high-Q tail tank (Q) is desirable to raise its impedance Z at 2FLO and to prevent the loss of L from penalizing the PN in the 1/f region [3]. To compare with the theoretical limit (FOM), the FOM in the 1/f PN region is plotted against L at different QTAIL. Closing the gap between FOM and FOM imposes an excessive Q of 20 or beyond, which can hardly be achieved and maintained over a wide tuning range.

DOIhttp://doi.org/10.1109/ISSCC.2018.8310340
URLView the original
Indexed BySCI
WOS Research AreaEngineering
WOS SubjectEngineering, Electrical & Electronic
WOS IDWOS:000459205600154
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被引频次[WOS]:7   [WOS记录]     [WOS相关记录]
Document TypeConference paper
专题University of Macau
Affiliation1.University of Macau, Macau, China
2.University of Malaya, Kuala Lumpur, Malaysia
3.Instituto Superior Tecnico/University of Lisboa, Lisbon, Portugal
First Author AffilicationUniversity of Macau
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Chee-Cheow Lim,Jun Yin,Pui-In Mak,et al. An inverse-class-F CMOS VCO with intrinsic-high-Q 1st- and 2nd-harmonic resonances for 1/f2-to-1/f3 phase-noise suppression achieving 196.2dBc/Hz FOM[C],2018:374-376.
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