Audio amplifier having load adjustment and method for the...

H - Electricity – 03 – G

Patent

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H03G 7/08 (2006.01)

Patent

CA 2725150

The invention relates to an audio amplifier (1) for amplifying an input signal into an output signal, comprising an output amplification stage (6), wherein the output amplification stage (6) for the amplification of an intermediate signal into the output signal is designed as an amplifier operating in switching operation, and further comprising a limiter device (4), which from a programming and/or a circuit design point of view is designed to generate the intermediate signal on the basis of the input signal, wherein the level of the intermediate signal is always limited by a maximum load as a function of a settable maximum output and a load impedance which is coupled and/or can be coupled the audio amplifier or equivalent parameter thresholds such that the output signal does not exceed the maximum load at the load impedance, or the equivalent parameter thresholds, independently of the input signal.

L'invention concerne un amplificateur audio (1) permettant d'amplifier un signal d'entrée pour obtenir un signal de sortie. Ledit amplificateur audio est équipé d'un étage d'amplification de sortie (6) destiné à amplifier un signal intermédiaire pour obtenir le signal de sortie, ledit étage étant conçu en tant qu'amplificateur fonctionnant en mode commuté, et d'un système de limitation (4) destiné à générer le signal intermédiaire sur la base du signal d'entrée, ledit système étant conçu selon une technique de programmation et/ou une technique de commutation. Le niveau du signal intermédiaire est limité par un niveau maximal en fonction d'une puissance maximale réglable et d'une impédance de charge couplée et/ou pouvant être couplée à l'amplificateur audio ou encore de limites de paramétrage équivalentes, toujours d'une manière telle que le signal de sortie, indépendamment du signal d'entrée, ne dépasse pas la puissance maximale avec l'impédance de charge et les limites de paramétrage équivalentes.

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