Transmitting device for driving a high-frequency antenna of a magnetic-resonance device

A power-amplifier unit of a transmitting device for driving a high-frequency antenna of a magnetic-resonance device using a target signal that is amplitude-modulatable, the power-amplifier unit comprising:

• a signal-conditioning device;
• a plurality of amplifier modules;
• and
• a combining device for combining output signals of the plurality of amplifier modules into the target signal,
• wherein the signal-conditioning device, the plurality of amplifier modules, and the combining device are disposed inside a housing,
• wherein the signal-conditioning device is operable to generate a plurality of drive signals having a predetermined pulse frequency, the plurality of drive signals including pulses having a length that is dependent on a desired target amplitude and having a phase corresponding to a desired target phase and a frequency corresponding to the desired target frequency, and
• wherein the pulses of the individual drive signals are each mutually offset in time by one divided by the number of amplifier modules of a pulse period corresponding to the pulse frequency, each drive signal of the plurality of drive signals being fed to an amplifier module of the plurality of amplifier modules.