Patent ID: 8120934

Claim:
A voltage converter, comprising: a first, a second and a third capacitor which are connected in series in at least one operating state; an input for supplying an input voltage; an input change-over switch having an input side that is connected to the input of the voltage converter and an output side that is connected to at least two capacitors from the group comprising the first, the second and the third capacitor; an output for providing an output voltage and coupled to a capacitor from the group comprising the first, the second and the third capacitor; and a compensation circuit which is coupled to the first, the second and the third capacitor in such a manner that a first voltage of the first capacitor, a second voltage of the second capacitor and a third voltage of the third capacitor are adapted to one another; one switch each being used in the input change-over switch and/or in the compensation circuit, wherein said one switch comprises a switching element and a resistor which are arranged in series connection, with the resistor being realized as a controllable resistor which is connected to an amplifier at a control input, and the amplifier having its input side connected to the output of the voltage converter and a voltage source, or said one switch being realized as a transistor with a turn-on resistance that is controlled by an amplifier, with the amplifier having its input side connected to the output of the voltage converter and a voltage source so that the transistor is operated in an ON state in which it has different turn-on resistances which are controlled by the amplifier as well as in an OFF state.