Class-D audio amplifiers with separated baseband for low-power mobile applications

In this paper, a digital real-time implementation of a binary zero-position coding concept with separated baseband is presented. This coding concept applies to highly power efficient class-D amplification for use in low-power mobile audio equipment. With its separated baseband, which by theory is fr...

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Bibliographische Detailangaben
Hauptverfasser:	Streitenberger, M., Felgenhauer, F., Bresch, H., Mathis, W.
Format:	Tagungsbericht
Sprache:	eng
Schlagworte:	Baseband Distortion measurement Dynamic range Low pass filters Power amplifiers Pulse amplifiers Pulse width modulation Signal processing Signal processing algorithms Space vector pulse width modulation
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Beschreibung
Zusammenfassung:	In this paper, a digital real-time implementation of a binary zero-position coding concept with separated baseband is presented. This coding concept applies to highly power efficient class-D amplification for use in low-power mobile audio equipment. With its separated baseband, which by theory is free of distortion, this concept enables the design of ultra linear class-D power amplifiers. The implemented coding system has a dynamic range of 70 dB and a separated baseband extending from 0 to 42 kHz with a resulting switching rate of only 97.6 kHz. Theory, implementation considerations and measurement results are discussed.
DOI:	10.1109/OCCSC.2002.1029076