A gain compression amplifier providing a linear compression...

H - Electricity – 03 – G

Patent

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Details

H03G 3/20 (2006.01) H04R 25/00 (2006.01)

Patent

CA 2190787

An amplifier uses gain compression techniques to provide linear gain control over a wide dynamic range, and includes an amplifier having input and output legs, a gain controller coupled between the input and output legs of the amplifier, a gain control circuit having an input coupled to the amplifier output leg and output coupled to the gain controller. The gain controller is responsive to a gain control signal to permit continuous gain adjustment of the amplifier. The gain control circuit is configured to compare an output voltage on the amplifier output leg with a predetermined threshold voltage and to generate a gain control signal on the gain control circuit output so as to provide continuous gain adjustment of the amplifier at least when the amplifier output voltage is greater than the threshold voltage. A hearing aid using a single compression amplifier or multiple compression amplifiers to minimize sound distortion and enhance user comfort is also provided.

Le système de l'invention comprend un amplificateur à L'invention est un système d'amplification utilisant la compression de gain pour obtenir une commande de gain linéaire sur une grande dynamique. branchements d'entrée et de sortie, une commande de gain montée entre les branchements d'entrée et de sortie de l'amplificateur, et un circuit de commande de gain dont l'entrée est couplée au branchement de sortie de l'amplificateur et dont la sortie est couplée à la commande de gain. La commande de gain réagit à la réception de signaux de commande en effectuant un ajustement continu du gain de l'amplificateur. Le circuit de commande de gain est configuré de façon à comparer la tension du branchement de sortie de l'amplificateur avec un seuil de tension prédéterminé et à produire un signal de commande de gain pour effectuer un ajustement continu du gain de l'amplificateur, du moins quand la tension de sortie de l'amplificateur est supérieure au seuil de tension. Une prothèse auditive utilisant un ou plusieurs amplificateurs à compression pour minimiser la distorsion sonore et accroître le confort de l'utilisateur est décrite dans l'exposé de l'invention.

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