An amplification device including an intermediate terminal for receiving an intermediate signal (s int), an output terminal and an amplification stage, the amplification stage being connected between the intermediate terminal and the output terminal, the amplification device being characterised in that the amplification stage comprises: - a switch including an output connected to the output terminal, a first input (18E1) and a second input (18E2), the switch being able to switch between a first position, in which the output is connected to the first input (18E1), and a second position, in which the output is connected to the second input (18E2); - a first branch connected between the intermediate terminal and the first input (18E1) of the switch, the first branch being configured to apply a first gain to the intermediate signal (s int) in order to generate a first amplified signal (s a1) for being delivered to the first input (18E1) of the switch; - a second branch connected between the intermediate terminal and the second input (18E2) of the switch, the second branch being configured to apply a second gain to the intermediate signal (s int) in order to generate a second amplified signal (s a2) for being delivered to the second input (18E2) of the switch; - a controller configured to control switching of the switch: - in the first position to apply the first amplified signal (s a1) to the output terminal, if the value of a predetermined quantity of the first amplified signal (s a1) belongs to a predetermined range; - in the second position to apply the second amplified signal (s a2) to the output terminal, if the value of the predetermined quantity of the first amplified signal (s a1) is outside the predetermined range; characterised in that the first gain and the second gain are non-null real numbers having opposite signs. - a switch including an output connected to the output terminal, a first input (18E1) and a second input (18E2), the switch being able to switch between a first position, in which the output is connected to the first input (18E1), and a second position, in which the output is connected to the second input (18E2); - a first branch connected between the intermediate terminal and the first input (18E1) of the switch, the first branch being configured to apply a first gain to the intermediate signal (s int) in order to generate a first amplified signal (s a1) for being delivered to the first input (18E1) of the switch; - a second branch connected between the intermediate terminal and the second input (18E2) of the switch, the second branch being configured to apply a second gain to the intermediate signal (s int) in order to generate a second amplified signal (s a2) for being delivered to the second input (18E2) of the switch; - a controller configured to control switching of the switch: - in the first position to apply the first amplified signal (s a1) to the output terminal, if the value of a predetermined quantity of the first amplified signal (s a1) belongs to a predetermined range; - in the second position to apply the second amplified signal (s a2) to the output terminal, if the value of the predetermined quantity of the first amplified signal (s a1) is outside the predetermined range; - in the first position to apply the first amplified signal (s a1) to the output terminal, if the value of a predetermined quantity of the first amplified signal (s a1) belongs to a predetermined range; - in the second position to apply the second amplified signal (s a2) to the output terminal, if the value of the predetermined quantity of the first amplified signal (s a1) is outside the predetermined range;