Active control based on an estimator for the bus-pumping cancellation in the half-bridge class-d audio power amplifiers

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To access the full text documents, please follow this link: http://hdl.handle.net/2117/13705

dc.contributor	Universitat Politècnica de Catalunya. Departament d'Enginyeria Electrònica
dc.contributor	Universitat Politècnica de Catalunya. MCIA - Motion Control and Industrial Applications Research Group
dc.contributor.author	Sala Caselles, Vicenç
dc.contributor.author	Romeral Martínez, José Luis
dc.date	2011
dc.identifier.citation	Sala, V.; Romeral, L. Active control based on an estimator for the bus-pumping cancellation in the half-bridge class-d audio power amplifiers. A: Audio Engineering Society Convention. "127th Convention". New York: 2011, p. 1-4.
dc.identifier.citation	978-0-937803-71-4
dc.identifier.uri	http://hdl.handle.net/2117/13705
dc.language.iso	eng
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	Àrees temàtiques de la UPC::Enginyeria electrònica::Electrònica de potència::Convertidors de corrent elèctric
dc.subject	Audio power amplifiers
dc.subject	Amplificadors de potència
dc.title	Active control based on an estimator for the bus-pumping cancellation in the half-bridge class-d audio power amplifiers
dc.type	info:eu-repo/semantics/publishedVersion
dc.type	info:eu-repo/semantics/conferenceObject
dc.description.abstract	In this paper is presented a new technique to avoid the distortion generated due to mid point voltage variations on DC-Bus of Class-D Half Bridge audio amplifiers. An usual distortion source on Class-D amplifier is the Bus-Pumping effect. Bus-Pumping causes characteristic distortion and introduces attenuation on output gain. Due to this effect the amplifier efficiency decreases. By including distortion factors on the Half-Bridge amplifier model a new Hybrid Active Control (HAC) is implemented. The HAC minimizes distortion due to mid point DC-Bus voltage variations. Simulation and experimental results confirm the theoretical approach of parameter influence on Bus-Pumping, and the effectiveness of HAC implemented control. Results show a clear reduction of generated distortion, which allows incremented audio amplifier efficiency.
dc.description.abstract	Peer Reviewed

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