Dynamic bias for rf power amplifiers

H - Electricity – 04 – B

Patent

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Details

H04B 7/005 (2006.01) H03F 1/02 (2006.01) H03G 3/30 (2006.01)

Patent

CA 2404824

A system and method for dynamically adjusting the operating bias of an RF transmitter amplifier in response to a power control signal. The invention provides high-efficiency RF power amplification for applications where the available power source is limited. The invention uses a power control signal resident in wireless communication system architectures with a detector and voltage to current converter to arrive at a dynamic amplifier operating bias.

L'invention concerne un système et un procédé destinés au réglage dynamique de la polarisation de fonctionnement d'un amplificateur d'émetteur RF en réponse à un signal de commande de la puissance. Ladite invention permet de mettre en oeuvre une amplification de puissance RF très efficace pour des applications dont la source de puissance est limitée. Ladite invention fait intervenir une signal de commande de la puissance résidant dans des architectures de systèmes de communication sans fil, ainsi qu'un détecteur et un convertisseur tension-courant afin de réaliser une polarisation de fonctionnement d'amplificateur dynamique.

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