| Type de publication : |
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Communications avec actes |
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| Domaine : |
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Sciences de l'ingénieur/Energie électrique
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| Titre : |
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Conducted EMI of Integrated Switching Audio Amplifier for Mobile Phone Applications |
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| Auteur(s) : |
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Salah-Eddine Adami 1, Roberto Mrad 1, 2, Florent Morel ( ) 1, Christian Vollaire ( ) 1, Gaël Pillonnet () 2, Rémy Cellier 3 |
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| Laboratoire : |
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| Résumé : |
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In this paper, conducted EMI measurements of two integrated Class D audio amplifiers are realized using the EN55022 standard, in order to compare the EMI behavior of two modulation techniques. The first circuit uses a carrier-based pulse-width modulation (PWM) and the second one uses a selfoscillating modulation based on sliding-mode (SM) control. Measurement results show that SM circuit has better EMI behavior compared to PWM circuit, thanks to spread spectrum effect of the SM circuit. Spice simulations using full transistor circuit model are realized to evaluate the range of validity of the used model in large frequencies. Simulation results are very closed to the measurement ones, especially for low and medium frequencies (up to 10MHz). |
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Langue du texte
intégral : |
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Anglais |
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| Titre de l'ouvrage : |
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Proc. of the 8th Workshop on Electromagnetic Compatibility of Integrated Circuits |
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| Audience : |
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internationale |
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| Date de publication : |
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11/2011 |
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| Page, identifiant, ... : |
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142-147 |
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| Éditeur scientifique : |
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IEEE |
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| Titre de la conférence : |
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EMC Compo |
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| Date de la conférence : |
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06/11/2011 |
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| Date de la conférence (fin) : |
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09/11/2011 |
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| Ville : |
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Dubrovnik |
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| Pays : |
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Croatie |
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| Mots Clés : |
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Switching Mode Audio Amplifier – Class D – Low EMI – EMC measurement |
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