An amplifier and a method of power amplification

H - Electricity – 03 – F

Patent

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Details

H03F 1/32 (2006.01) H03F 3/20 (2006.01)

Patent

CA 2311475

The present invention relates to a power amplifier and to a method of amplifying in the power amplifier a first composite radio signal that includes at least two modulated carrier waves. The first radio signal is divided into two radio signals, which are amplified in a first and a second non-linear amplifier. Intermodulation products arise in the amplification of said radio signals in respective amplifiers. A compensation signal is generated from the output signal of the second amplifier, and the modulated carrier waves are suppressed selectively, e.g. by filtering out the carrier waves in band-stop filters. An output signal from the power amplifier is generated by reverse phase addition of the compensation signal to the output signal from the first amplifier.

La présente invention concerne un amplificateur de puissance (400), ainsi qu'un procédé permettant d'amplifier, dans cet amplificateur de puissance (400), un premier signal radio composite (RF41) comprenant au moins deux ondes porteuses modulées. Ce premier signal radio (RF41) est divisé en deux signaux radio (RF42, RF43), lesquels sont ensuite amplifiés dans un premier et dans un second amplificateurs non linéaires (405, 406), des produits d'intermodulation intervenant dans l'amplification de ces signaux radio dans leur amplificateur respectif (405, 406). Un signal de correction (RF45) est produit par le signal de sortie (RF46) du second amplificateur (406), et les ondes porteuses modulées sélectivement supprimées, par exemple grâce à un filtrage de ces ondes par filtres coupe-bandes (408-409). Un signal de sortie (RF47), provenant dudit amplificateur de puissance (400), est produit par un ajout à inversion de phases du signal de correction (RF45) et du signal de sortie (RF44) provenant du premier amplificateur (405).

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