A power-supply system has a power converter configured to generate a high-frequency power signal and supply the high-frequency power signal to a load such as a plasma or gas laser process. The power converter includes a digital-to-analog converter (DAC) configured to generate an analog signal from a digital signal, an amplifier path in which the generated analog signal is amplified, and a logic-circuit unit coupled upstream of the DAC and configured to generate the digital signal and supply the generated digital signal to the DAC. The logic-circuit unit includes a signal-data buffer storing a signal-data value for generating a shape of the analog signal, an amplitude-data buffer storing an amplitude-data value for influencing an amplitude of the analog signal, and a multiplier configured to multiply the signal-data value by the amplitude-data value.