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Analysis and Design of Current Mode Class-D Power Amplifiers With Finite Feeding Inductors

2020-05Journal article Restricted access
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dc.contributor.authorSilva-Pereira, M.
dc.contributor.authorAssunção, Mário
dc.contributor.authorVaz, João Caldinhas
dc.date.accessioned2025-05-07T13:39:40Z
dc.date.available2025-05-07T13:39:40Z
dc.date.issued2020-05
dc.description.abstractCurrent-mode class-D (CMCD) power amplifiers (PAs) may not achieve a switching efficiency as good as class-E PAs, but they require fewer inductances and deliver almost five times more power for the same load and supply voltage when compared with the ideal push–pull class-E PA. Furthermore, CMCD PAs can easily use bondwires as the only circuit inductors, a precious feature that Internet-of-Things (IoT) wireless interfaces can exploit. For this reason, we analyze the voltage and current waveforms in CMCD PAs without assuming infinite value feeding inductors (i.e., without choke inductors). It is shown that the current stress on the switching device is significantly higher than in the conventional topology, especially in bondwire-based designs where relatively small feeding induc tances are presented. Finally, we propose a design procedure for a given feeding inductance that maximizes energy efficiency while delivering a compact-size solution. A 2.4-GHz PA capable of delivering 19.8 dBm to a 100-Ω differential load with a power added-efficiency (PAE) of 58% is presented. Three-dimensional electromagnetic (3-D EM) simulations combined with postlayout simulations were used to evaluate the PA performance in a quad-flat nonlead (QFN)-type package. The circuit is designed in a 0.13-μm process and only occupies a silicon area of 0.025 mm2.eng
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSilva-Pereira, M., Assunção, M., & Vaz, J. C. (2020). Analysis and design of current mode class-D power amplifiers with finite feeding inductors. IEEE Transactions on Very Large Scale Integration (VLSI) Systems, 28(5), 1292-1301
dc.identifier.doi10.1109/TVLSI.2020.2971955
dc.identifier.issn1557-9999
dc.identifier.urihttp://hdl.handle.net/10400.26/57778
dc.language.isoengpt_PT
dc.peerreviewedyes
dc.publisherIEEEpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nd/4.0/
dc.subjectBluetooth low energy
dc.subjectbondwire
dc.subjectclass D
dc.subjectcurrent-mode class-D (CMCD) power amplifier (PA)
dc.subjectcompact size
dc.subjectdesign procedure
dc.subjectinverse class D
dc.subjectlow cost
dc.titleAnalysis and Design of Current Mode Class-D Power Amplifiers With Finite Feeding Inductorspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1301pt_PT
oaire.citation.issue5
oaire.citation.startPage1292pt_PT
oaire.citation.titleIEEE Transactions on Very Large Scale Integration (VLSI) Systemspt_PT
oaire.citation.volume28pt_PT
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT

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