H - Electricity – 04 – R
Patent
H - Electricity
04
R
H04R 1/00 (2006.01) H03F 3/217 (2006.01) H03M 1/00 (2006.01) H04R 3/00 (2006.01) H04R 5/04 (2006.01) H04R 19/00 (2006.01)
Patent
CA 2445463
The present invention relates to an apparatus for converting an audio signal from a source (25) into audio waves, comprising a modulator (17), for modulating said audio signal, an amplifying switching stage (15), for amplifying a modulated audio signal supplied from the modulator, and a transducer (19). The transducer is connected directly to the switching stage, and is arranged to convert a pulse train from the switching stage into audio waves. Further, the modulator, the switching stage and the conversion means are integrated mechanically and electrically in one operational unit, being connectable directly to a mains power supply (12). By this electrical integration, no separate filtering is required, but instead the inherent qualities of the transducer are used for accomplishing filtering of the pulse train.
L'invention concerne un dispositif de conversion de signaux audio émanant d'une source (25) en ondes audio, qui comprend un modulateur (17) modulant ces signaux, un étage de commutation et d'amplification (15), pour l'amplification des signaux audio modulés issus du modulateur, et un transducteur (19). Ce transducteur est relié directement à l'étage de commutation, pour la conversion d'un train d'impulsions provenant de l'étage de commutation, sous la forme d'ondes audio. Par ailleurs, le modulateur, l'étage de commutation et l'unité de conversion sont intégrés mécaniquement et électriquement sous la forme d'un bloc opérationnel, qui peut être relié directement au secteur (12). Cette intégration électrique permet d'éviter tout filtrage distinct, et donc d'utiliser les qualités inhérentes du transducteur pour le filtrage du train d'impulsions.
Bang & Olufsen Icepower A/s
Fetherstonhaugh & Co.
LandOfFree
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