Power amplifier circuit and front end circuit

摘要

A power amplifier circuit (DIPPA), comprising a driver stage (DR) which is applicable to provide a preamplified driver signal (S_DR) dependent on a predetermined transmit signal. The power amplifier circuit (DIPPA) comprises also a frequency selector (DIP) which is electrically coupled to the driver stage (DR) and which is applicable to separate the driver signal (S_DR) into a first and second signal (S—1, S—2). The first signal (S—1) is associated to a first predetermined and the second signal (S—2) is associated to a second predetermined frequency band. The power amplifier circuit (DIPPA) comprises at least a first and second power amplifier stage (PA1, PA2). The first and second power amplifier stage (PA1, PA2) are electrically coupled to the frequency selector (DIP). The first and second power amplifier stage (PA1, PA2) is operable to provide a first and second amplified signal (S_A1, S—2), respectively, dependent on the first and second signal (S—1, S—2), respectively.

主权项

1. 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.