Driver device and driving method for driving a capacitive load, in particular an ultrasound transducer

An ultrasound transducer comprising:

• a transducer element having an input terminal;
• and
• a driver device coupled to the transducer element and the driver device comprising:
• an output terminal for providing an alternating drive voltage to a load applied to the transducer element;
• a plurality of voltage supply elements for providing intermediate voltage levels;
• a plurality of controllable connecting means each associated to one of the voltage supply elements for connecting the voltage supply elements to the output terminal and for supplying one of the intermediate voltage levels or a sum of a plurality of the intermediate voltage levels as the alternating drive voltage to the output terminal;
• and
• a second output terminal, wherein the drive voltage is provided between the output terminal and the second output terminal, and wherein the output terminal is connected to the input terminal of the transducer element.