Device for operational state recovery and corresponding equipment

A device for driving a power supply start-up circuit may include a logic unit for storing an operating state of equipment, where the logic unit is activatable by a start-up signal reaching a start-up threshold. The device may also include a detector, where the detector provides a signal to the logic unit indicating a drop in the signal below a drop threshold. The detector may enable the logic unit to continue operating in the presence of a failure of a power supply to store the operating state of the equipment upon occurrence of the failure of the power supply. In addition, the device may include a start-up circuit sensitive to a power supply signal, where the start-up circuit is activatable by the power supply signal as restored after the failure, and the start-up circuit may provide the start-up signal reaching the start-up threshold upon the power supply signal being restored.