Two-channel acoustic filter with rejection compensation

H - Electricity – 03 – H

Patent

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Details

H03H 9/64 (2006.01) H03H 9/00 (2006.01) H03H 9/145 (2006.01) H03H 9/02 (2006.01)

Patent

CA 2280422

L'invention concerne un filtre à ondes acoustiques de surface comprenant des premier et second canaux, chaque canal comporte au moins un transducteur d'entrée et un transducteur de sortie. Les fonctions de transfert du premier canal et du second canal sont en phase dans la bande passante du filtre et en opposition de phase dans la bande de rejection du filtre. Ce type de configuration permet d'utiliser des réponses en fréquence pour chaque canal, avec des bandes larges permettant de réduire fortement la taille du filtre tout en diminuant la bande de rejection du filtre global. Applications : Téléphone mobile.

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