Power amplification apparatus of portable terminal

H - Electricity – 04 – B

Patent

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Details

H04B 1/04 (2006.01) H03F 1/02 (2006.01)

Patent

CA 2474975

This invention relates to a power amplifier for a mobile communication device. The power amplifier improves the efficiency and the linearity by controlling the input voltage of the peakin amplifier (130). The power amplifier operates at the Doherty mode when the output power from the voltage-control means (170) is in the low range. For the higher output power, the control input (80) to the peaking amplifier (130) is increased up to such a point for satisfying the non-linear property of the power amplifier.

L'invention concerne un amplificateur de puissance destiné à un dispositif de communication mobile. Ledit amplificateur de puissance permet d'améliorer son efficacité et ses propriétés de linéarité par régulation de la tension d'entrée dudit amplificateur de correction (130), et fonctionne en mode Doherty lorsque la puissance de sortie des moyens de régulation (170) de tension se trouve dans une faible plage. Pour obtenir une puissance de sortie plus élevée, l'entrée de régulation (80) vers l'amplificateur de correction (130) est augmentée jusqu'à atteindre un point permettant de satisfaire la propriété de non linéarité de l'amplificateur de puissance.

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