Infineon Technologies Ag

Intel Mobile Communications Gmbh

Boris Kapfelsperger

Elmar Wagner

Alexander Belitzer

Andre Hanke

Volker Thomas

Krzysztof Kitlinski

Günter Donig

Alfons Schmid

A signal generator for a transmitter or a receiver for transmitting or receiving RF-signals according to a given communication protocol includes an oscillator and a mismatch compensator. The oscillator is configured to provide a signal generator output signal having a signal generator output frequency and comprises a fine tuning circuit for providing a fine adjustment of the signal generator output frequency based on a fine tuning signal and a coarse tuning circuit for providing a course adjustment of the signal generator output frequency based on a coarse tuning signal. The mismatch compensator is configured to receive the signal generator output signal and compensate a frequency mismatch between a desired signal generator output frequency and the signal generator output frequency generated by the oscillator by providing the fine tuning signal for changing the state of the fine tuning circuit of the oscillator and by providing the coarse tuning signal for changing a state of the coarse tuning circuit of the oscillator. The mismatch compensator provides the coarse tuning signal during a guard period defined in the given communication protocol, during which no RF-signals are transmitted by the transmitter or no RF-signals are to be received by the receiver, such that the state of the coarse tuning circuit is changed within the guard period.

Signal generator for a transmitter or a receiver, a transmitter and a receiver

A power amplifier arrangement comprises a power amplifier in a semiconductor body. At least one first input terminal on the surface of the semiconductor body is provided for feeding in a signal to be amplified. A first output tap of the arrangement is designed for outputting a signal with a first center frequency; a second and a third output tap are designed for outputting a second signal with a second center frequency. A line wire is respectively connected to the second and third output taps on the surface of the semiconductor body. According to the invention, a charge store is provided, which is coupled to the third output tap and is designed for forming a series resonant circuit with the line wire connected to the third output tap.

Power amplifier arrangement and method for processing a radiofrequency signal

Growing community of inventors

Igling, Germany

Boris Kapfelsperger