A method for controlling an electric amplifier is provided. The method
includes monitoring a closed-loop control signal of a regulator, which
triggers an end stage of the amplifier; adjusting the closed-loop control
signal as a function of an output signal of the end stage; comparing the
closed-loop control signal with a reference signal; triggering the end
stage when an amplitude limit value and a period length limit value are
exceeded or undershot by the amplitude value and period length value,
respectively, of the closed-loop control signal; and blocking an input
side and/or the regulator when the end stage is triggered.