The circuit has a transistor (V4) for controlling an electronic switch (V1) i.e. FET, and a control connection connected with the electronic switch. A feedback unit (C1) is provided between a capacitor (C) and the transistor. Voltage potential (P5V) at the control connection of the electronic switch is changed such that an intermittent charging of the capacitor is carried out by the electronic switch. The electronic switch is controlled in a charging condition of the capacitor. An ohmic resistor (R) is provided parallel to the capacitor, and the feedback unit is formed as capacitor.
