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 (K1) 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 (K2) 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 (K1) and the second gain (K2) 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 (K1) 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 (K2) 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; <EOS>