A system, voltage supply circuit, control unit for a voltage supply circuit, and method of controlling a voltage supply circuit are disclosed. For example, a system is disclosed that comprises at least one electronic circuit and a voltage supply unit coupled to an input of the at least one electronic circuit. The voltage supply unit includes a power unit to supply a voltage to the at least one electronic circuit and a control unit to control an operating mode of the power unit, an output of the control unit coupled to an input of the power unit. The control unit includes a mode selector to select the operating mode of the power unit, coupled to at least a first output of the power unit, an amplifier coupled to the at least a first output of the power unit, a compensation circuit, and a first switching unit coupled to the mode selector and the compensation circuit, to couple the compensation circuit to the amplifier if a selected operating mode of the power unit is a first mode.