High efficiency power amplification apparatus with multiple...

H - Electricity – 03 – F

Patent

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Details

H03F 3/20 (2006.01) H03F 3/72 (2006.01)

Patent

CA 2514679

The present invention relates to a power amplification apparatus provided in a wireless communications terminal and, particularly, to a high efficiency power amplification apparatus which may efficiently amplify power in accordance with various output power levels without using bypass switching circuits. The high efficiency power amplification apparatus according to the present invention makes it possible to amplify various levels of power without using bypass switching circuits so that problems in the multi-mode power amplification apparatus of the related art, such as the power loss caused by bypass switching circuits used, the increase of size of the power amplification apparatus, the decline of price competitiveness, etc., may be solved. Also, the high efficiency power amplification apparatus according to the present invention reduces the DC power loss at the low power mode so that the power added efficiency characteristic of the power amplification apparatus may be improved.

La présente invention concerne un amplificateur de puissance équipant un terminal de radiocommunications, et plus particulièrement un amplificateur de puissance à haut rendement capable d'amplifier à haut rendement la puissance selon divers niveaux de puissance de sortie, sans utiliser de circuits de commutation en dérivation. L'amplificateur de puissance à haut rendement de l'invention permet d'amplifier divers niveaux de puissance, sans utiliser de circuits de commutation en dérivation, ce qui permet de résoudre les problèmes rencontrés dans le cas des amplificateurs de puissance multimodes selon l'état de la technique, et notamment les pertes de puissance provoquée par les circuits de commutation en dérivation, l'augmentation de taille de l'amplificateur de puissance, et la perte de compétitivité en matière de prix. En l'occurrence, l'amplificateur de puissance à haut rendement de la présente invention réduit la perte de courant continu en mode basse puissance, ce qui permet d'améliorer le rendement de la fonction d'ajout de puissance de l'amplificateur de puissance.

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