Patent ID: 8912847

Claim:
A power amplifier circuit for wireless communication devices, comprising: a driver stage with an input terminal and output terminal, the driver stage being applicable to provide a preamplified driver signal at its output terminal dependent on a predetermined transmit signal at its input terminal, a frequency selector with an input terminal and at least two output terminals, the frequency selector being electrically coupled to the output terminal of the driver stage via its input terminal and being operable to separate at least a first signal and a second signal from the driver signal, whereas the first signal is associated to a first predetermined frequency band and the second signal is associated to a second predetermined frequency band, at least a first power amplifier branch and a second power amplifier branch with each comprising an input terminal and an output terminal, whereas the input terminal of the first power amplifier branch is electrically coupled to the first output terminal of the frequency selector and the input terminal of the second power amplifier branch is electrically coupled to the second output terminal of the frequency selector, whereas the first power amplifier branch is operable to provide a first amplified signal at its output terminal dependent on the first signal and the second power amplifier branch is operable to provide a second amplified signal at its output terminal dependent on the second signal, and a traveling wave amplifier used to constitute the frequency selector and the driver stage.