Class-D audio amplifiers in mobile applications

A comparative system-level overview is given of alternative class-D amplifier architectures. The theory behind pulse-width modulation and different modulation schemes is discussed. Topological alternatives such as open-loop versus feedback, fixed-carrier versus self-oscillating are analyzed and comp...

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Bibliographic Details
Main Author: Berkhout, M.
Format: Conference Proceeding
Language:English
Subjects:
Batteries
CMOS technology
Frequency
High power amplifiers
Power amplifiers
Power generation
Pulse amplifiers
Pulse width modulation
Radiofrequency amplifiers
Switches
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Description
Summary:A comparative system-level overview is given of alternative class-D amplifier architectures. The theory behind pulse-width modulation and different modulation schemes is discussed. Topological alternatives such as open-loop versus feedback, fixed-carrier versus self-oscillating are analyzed and compared in terms of relevant characteristics such as distortion, power supply rejection, efficiency and electro-magnetic interference. The combination of D/A conversion and class-D amplifiers is discussed.
ISSN:0271-4302
2158-1525
DOI:10.1109/ISCAS.2009.5117969