Power supply device for a power amplifier of a mobile...

H - Electricity – 04 – Q

Patent

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Details

H04Q 7/38 (2006.01) H03G 3/00 (2006.01) H03G 3/30 (2006.01) H04B 7/005 (2006.01) H04Q 7/32 (2006.01)

Patent

CA 2223865

Power supply device for a power amplifier of a mobile radiocommunications terminal. Power supply device for a power amplifier (1) of a mobile radiocommunications terminal, capable of supplying transmission power capable of exhibiting relatively rapid variations and relatively slow variations, this device (2) being essentially remarkable in that it comprises: - an active power tripole (3) to control the said power amplifier, receiving a control voltage (Vc) based on the said relatively rapid variations and a supply voltage (Vt) from the said active tripole, and supplying to the said power amplifier a given supply current (Ia) at a given voltage (Va) called the supply voltage of the said power amplifier, - means (5) of generating supply voltage for the said active tripole, capable of supplying to the said active tripole a variable supply voltage (Vt) such that, for a given value of the said transmission power capable of exhibiting relatively slow variations, the voltage drop at the terminals of the said active tripole is minimal.

Dispositif d'alimentation d'un amplificateur de puissance pour terminal de radiocommunications mobiles Dispositif d'alimentation d'un amplificateur de puissance (1) pour terminal de radiocommunications mobiles, apte à fournir une puissance d'émission susceptible de présenter des variations relativement rapides et des variations relativement lentes, ce dispositif (2) étant essentiellement caractérisé en ce qu'il comporte: - un tripôle actif de puissance (3) pour la commande dudit amplificateur de puissance, recevant une tension de commande (Vc) fonction desdites variations relativement rapides et une tension (Vt) dite tension d'alimentation de ce tripôle actif, et fournissant audit amplificateur de puissance un courant d' alimentation donné (Ia) sous une tension donnée (Va) dite tension d'alimentation de cet amplificateur de puissance, - des moyens (5) de génération de tension d'alimentation dudit tripôle actif, aptes à fournir audit tripôle actif une tension d'alimentation (Vt) variable de manière à ce que, pour une valeur donnée de ladite puissance d'émission susceptible de présenter des variations relativement lentes, la chute de tension aux bornes dudit tripôle actif soit minimale.

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