Patent ID: 7505742

Claim:
A mobile wireless device comprising: an amplifier coupled to receive a first signal, the first signal being amplified in the amplifier, and to provide the amplified first signal to an antenna of the wireless device through an output matching network; a switching voltage regulator circuit having an input terminal coupled to receive a DC voltage provided by a battery, and an output voltage terminal that sources a first variable voltage signal across terminals of a transistor of the amplifier; a bias voltage generator that generates a second variable DC voltage signal that is provided to an input of the transistor; and a controller having an input terminal connected to receive a signal, wherein the signal is sampled between the output of the amplifier and the antenna, the controller receives a second signal based on said sampling, the controller provides a third signal to the switching voltage regulator that determines the first variable voltage signal, and the controller provides a fourth signal to the bias voltage generator that determines the second variable voltage signal, the third and fourth signals being dependent on a value of the signal.