Systems and methods apply pulsed laser energy to an eye with a pulsed laser system. For the second gear ratio, the flyweights push the ring gear against the axial thrust of the helical teeth in a direction causing the engagement of the clutch against the ring and thus, at the same time, the disengagement of the clutch. An emitter of the second initial stage transistor is connected to the emitter of the first initial stage transistor at a node.