Title :
Efficiency of low power audio amplifiers and loudspeakers
Author :
Burrow, S. ; Grant, D.
Author_Institution :
Bristol Univ., UK
Abstract :
This paper looks 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 the 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 the efficiency
Keywords :
audio-frequency amplifiers; electric reactance; losses; loudspeakers; network topology; transducers; amplifier/transducer; class-AB amplifier topology; class-D amplifier topology; loudspeakers; low power audio amplifiers; power losses; quadrature load current; quadrature load current recycling; reactive loads; sound reproduction; transducers; Acoustic transducers; Electric resistance; Filters; Frequency; High power amplifiers; Impedance; Loudspeakers; Operational amplifiers; Power amplifiers; Topology;
Conference_Titel :
Consumer Electronics, 2001. ICCE. International Conference on
Conference_Location :
Los Angeles, CA
Print_ISBN :
0-7803-6622-0
DOI :
10.1109/ICCE.2001.935328
