Two stage microwave class e power amplifier

H - Electricity – 03 – F

Patent

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Details

H03F 3/217 (2006.01)

Patent

CA 2595944

A load circuit (40) for use with a switching mode circuit (50). The novel load circuit (40) includes a series inductive-capacitive network (32, 34) coupled to an output of the switching mode circuit (50) and a circuit (42) for providing a capacitance coupled to the output of the switching mode circuit (50). In an illustrative embodiment, the circuit (42) for providing capacitance includes one or more lumped capacitors adapted to compensate for an intrinsic capacitance in the switching mode circuit (50). The load circuit (40) may also include a shunt inductance coupled to the output of the switching mode circuit. In an illustrative embodiment, the load circuit (40) is adapted to provide a Class-E load to a two-stage high power amplifier (100). The amplifier (100) includes a driver stage (102), a novel Class-E inter-stage matching network (ISMN) (104), and a high power stage (106) using the novel load circuit (40).

L'invention concerne un circuit de charge (40) utilisable avec un circuit de mode de commutation (50). Le circuit de charge (40) selon l'invention comprend un réseau inductif-capacitif en série (32, 34) couplé à une sortie du circuit de mode de commutation (50), ainsi qu'un circuit (42) fournissant une capacité et couplé à la sortie du circuit de mode de commutation (50). Selon un mode de réalisation de l'invention, le circuit (42) fournissant une capacité comprend un ou plusieurs condensateurs regroupés aptes à compenser une capacité intrinsèque dans le circuit de mode de commutation (50). Le circuit de charge (40) peut également comprendre une inductance shunt couplée à la sortie du circuit de mode de commutation. Selon un autre mode de réalisation de l'invention, le circuit de charge (40) peut fournir une charge de classe E à un amplificateur (100) à grande puissance à deux étages. Cet amplificateur (100) peut comprendre un étage d'attaque (102), un nouveau réseau d'adaptation inter-étages (ISMN ; 104) de classe E, ainsi qu'un étage haute puissance (106) utilisant le nouveau circuit de charge (40).

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