An electronic radio system for power amplification of a radiofrequency signal having an electronic circuit having at least one in-service amplifier component, a detector measuring at least one electrical parameter of the in-service amplifier component, having at least the intensity of the electric current supplying the in-service amplifier component, a power attenuator adjusting the output power of the electronic circuit, and a programmable circuit receiving and transmitting commands to control the modules of the radio electronic system. The programmable circuit furthermore includes means for obtaining at least one measurement value relating to the intensity of the electric current supplying said in-service amplifier component of said detector and means for controlling said power attenuator in the case where at least one measurement value obtained exceeds a predetermined threshold value corresponding thereto. The invention also relates to an associated electronic circuit protection method.