Patent · US Active

Method for driving loudspeakers

US8917875B2 · kind B2 · utility

0Cited by

11References

26Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Christoph Braun · Rosenheim, DE
Thomas Duda · Duisburg, DE
Torsten Hinz · Neuss, DE

Key dates

Filing date	Sep 29, 2011
Grant date	Dec 23, 2014
Priority date	—
Expiry date	Apr 24, 2033

Classification

Technology area (CPC H)Electricity
CPC primaryH04S2400/07
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A circuit for operating loudspeakers includes a first, second, third and fourth loudspeaker circuit, having one input each for injecting a signal and one output each for connecting a loudspeaker input. The loudspeaker circuits are designed to amplify the injected signal and to provide the amplified signal at the outputs thereof. The loudspeaker circuits can, for example, be used for a 2.1 sound system. The three channels for a 2.1 sound system can be implemented by an amplifier circuit with four loudspeaker circuits, one loudspeaker circuit each being required for the two stereo channels left and right. A subwoofer channel can be driven differentially by two loudspeaker circuits. The stereo channels are, by contrast, only still connected to one loudspeaker circuit each, and so the stereo channels require at least one further common ground cable.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.