Patent ID: 7359685

Claim:
A transmission stage for providing an input signal to an amplifier input of an amplifier, the amplifier further comprising control input and an amplifier output, comprising: a signal input for receiving a nominal signal to be transmitted; a controllable oscillator having a frequency control input and an oscillator output, wherein the oscillator output may be operatively coupled to the amplifier input of the amplifier; a feedback path having a feedback path amplifier having a variable amplification; a phase regulator for generating a frequency control signal for the frequency control input of the controllable oscillator, wherein the phase regulator is operatively coupled to the feedback path in order to receive an actual signal, and wherein the phase regulator is further operatively coupled to the signal input in order to receive the nominal signal; an amplitude regulator for generating an amplification control signal for the control input of the amplifier, wherein the amplitude regulator is operatively coupled to the feedback path in order to receive the actual signal, and wherein the amplitude regulator is coupled to the signal input in order to receive the nominal signal; and a controller for controlling a mean power level of a signal at the amplifier output of the amplifier, wherein the controller is implemented in order to control the amplitude regulator depending on a request for a change of the mean power level so that the amplitude regulator generates a changed amplification control signal using the actual signal and/or the nominal signal, the controller further being operative to simultaneously vary an amplification of the feedback path amplifier so that an amplitude of a signal in the feedback path located in the signal flow behind the feedback path amplifier, the signal being equal to the actual signal or being derivable from the actual signal, remains in a predetermined range, and wherein the controller is further implemented in order to reduce the amplification of the feedback path amplifier in a request for a higher mean power level and to control the amplitude regulator so that the amplification control signal causes an amplification increase of the amplifier, and wherein the controller is further implemented in order to increase the amplification of the feedback path amplifier in a request for a lower mean power level and to control the amplitude regulator so that the amplification control signal causes an amplification decrease of the amplifier.