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

摘要

A transmitting device for driving a high-frequency antenna of a magnetic-resonance device using a target signal capable of being amplitude-modulated is provided. A number N of similarly embodied amplifier modules, where N is at least two, a signal-conditioning device, and a combining device for combining output signals of the amplifier modules into the target signal are provided. The signal-conditioning device generates N drive signals having a predetermined pulse frequency that consist of pulses having a length dependent on a desired target amplitude and having a phase corresponding to the desired target phase and a frequency corresponding to the desired target frequency. The pulses of the individual drive signals are mutually offset in time by, in each case, 1/N of a pulse period corresponding to the pulse frequency. Each drive signal is fed to an amplifier module.

主权项

1. A single transmitting device configured for driving a high-frequency antenna of a magnetic-resonance device, the single transmitting device generating a target signal that is amplitude-modulatable, the single transmitting device comprising:
a plurality of amplifier modules; a signal-conditioning device; and a combining device that combines output signals of the plurality of amplifier modules into the target signal, 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, 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, and wherein each pulse, of the individual drive signals is a packet of signal periods having a corresponding pulse length based on a duty factor as a function of a desired target amplitude, a same high frequency that is to be generated, the target frequency, and the target phase.