High efficiency converter providing switching amplifier bias

Details High efficiency converter providing switching amplifier bias High efficiency converter providing switching amplifier bias

2007-03-20

2011-12-20

Kuntz, Curtis (Department: 2614)

Electrical audio signal processing systems and devices

Binaural and stereophonic

Stereo speaker arrangement

C381S150000, C381S370000

Reexamination Certificate

active

08081785

ABSTRACT:
An audio amplifier system having improved power efficiency by wasting less power in its bias voltage circuit. An amplifier provides a voice signal to a first (+) input of a loudspeaker and a high efficiency converter provides a bias voltage to a second (−) input of the loudspeaker. In multi-loudspeaker systems, a single high efficiency converter can bias all the loudspeakers at a common node. The high efficiency converter can be a charge pump or a buck converter or the like, and has greater than 90% efficiency.

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