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A quadrature RC-oscillator with capacitive coupling

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dc.contributor.authorCasaleiro, João
dc.contributor.authorOliveira, Luís B.
dc.contributor.authorFilanovsky, Igor M.
dc.date.accessioned2017-07-24T13:23:18Z
dc.date.available2017-07-24T13:23:18Z
dc.date.issued2016
dc.description.abstractIn this paper the capacitive coupling in quadrature RC-oscillators is investigated. The capacitive coupling has the advantages of being noiseless with a small area penalty and without increasing the power dissipation. The results show that a phase error below 11 and an amplitude mismatch lower than 1% are obtained with a coupling capacitance about 20% of the oscillator's capacitance value. Due to this kind of coupling, the phase-noise improves by 3 dB (to 115.1 dBc/Hz @ 10 MHz) and the increase of power requirement is only marginal leading to a figure-of-merit of 154.8 dBc/Hz. This is comparable to the best state-of-the-art RC-oscillators, yet the dissipated power is about four times less. We present calculations of frequency, phase error and amplitude mismatch that are validated by simulations. The theory shows that phase error is proportional to the amplitude mismatch, indicating that an automatic phase error minimization based on the amplitude mismatches is possible. The measurements on a 2.4 GHz voltage-controlled quadrature RC-oscillator with capacitive coupling fabricated in 130 nm CMOS circuit prototypes validate the theory.pt_PT
dc.description.sponsorshipEXCL/EEI-ELC/0261/2012
dc.description.sponsorshipPEST-OEEEI/UI0066/2014
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCASALEIRO, J.; OLIVEIRA, L. B.; FILANOVSKY, I. M. - A quadrature RC-oscillator with capacitive coupling. Integration-the VLSI Journal. ISSN 0167-9260. Vol. 52, (2016), pp. 260-271pt_PT
dc.identifier.doi10.1016/j.vlsi.2015.06.006pt_PT
dc.identifier.issn0167-9260
dc.identifier.issn1872-7522
dc.identifier.urihttp://hdl.handle.net/10400.21/7301
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relation.publisherversionhttp://ac.els-cdn.com/S0167926015000772/1-s2.0-S0167926015000772-main.pdf?_tid=007e7e6e-7072-11e7-8543-00000aacb35f&acdnat=1500902239_62bee7d446b5322115ebb8185f87ed3fpt_PT
dc.subjectQuadrature oscillatorpt_PT
dc.subjectCapacitive couplingpt_PT
dc.subjectRC-oscillatorspt_PT
dc.subjectCoupled oscillatorspt_PT
dc.subjectVan der Pol oscillatorspt_PT
dc.titleA quadrature RC-oscillator with capacitive couplingpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage271pt_PT
oaire.citation.startPage260pt_PT
oaire.citation.titleIntegration-the VLSI Journalpt_PT
oaire.citation.volume52pt_PT
person.familyNameCasaleiro
person.givenNameJoão
person.identifier.ciencia-id101D-E2CA-5F74
person.identifier.orcid0000-0002-4722-0954
person.identifier.scopus-author-id35241828400
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication15646b2c-e3fb-4cbf-8293-1770ba8420e3
relation.isAuthorOfPublication.latestForDiscovery15646b2c-e3fb-4cbf-8293-1770ba8420e3

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