DocumentCode
1548509
Title
Efficiency of low power audio amplifiers and loudspeakers
Author
Burrow, S. ; Grant, D.
Author_Institution
Bristol Univ., UK
Volume
47
Issue
3
fYear
2001
fDate
8/1/2001 12:00:00 AM
Firstpage
622
Lastpage
630
Abstract
We look at the load presented to audio amplifiers by real transducers. We consider the power losses in class-AB and class-D amplifier topologies, and determine that in order to predict efficiency it is necessary to consider the amplifier/transducer combination. The ability of the class-D amplifier to recycle quadrature load current offers new ways to improve efficiency
Keywords
acoustic transducers; audio-frequency amplifiers; loudspeakers; network topology; EM loudspeakers; amplifier/transducer combination; audio amplifier efficiency; audio amplifier load; class-AB amplifier topology; class-D amplifier topology; loudspeaker efficiency; low power audio amplifiers; power losses; quadrature load current; transducer load; Equations; Filters; Impedance; Loudspeakers; Multiple signal classification; Operational amplifiers; Power amplifiers; Topology; Transducers; Voltage;
fLanguage
English
Journal_Title
Consumer Electronics, IEEE Transactions on
Publisher
ieee
ISSN
0098-3063
Type
jour
DOI
10.1109/30.964155
Filename
964155
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