Abstract: The invention relates to a device for rejecting interference signals in bipolar voltage sources, in particular in high-voltage sources in a powertrain of an electric vehicle, wherein an amplifier circuit is provided, with an input stage the input of which is symmetrically connected by means of an electrically isolated tap to a positive power line and a negative power line of a voltage source in order to tap an interference signal, and with an output stage, actuated by the input stage, the output of which is symmetrically connected in each case via an output capacitor to the positive power line and the negative power line, in order to feed in a correction signal.

Abstract: A coating device for coating a flexible substrate and methods of manufacturing and operating a coating device are described. The coating device includes a roll having an axis and two or more insulating layers, wherein a first insulating layer is applied on a first area and a second insulating layer is applied on a second area on the surface of the roll, the first and second area being circumferential, and wherein at least one insulating layer is adapted to be applied as a vapor or as a fluid, and a central area between the first and second area, and a flexible substrate receiving area having two or more boundaries, wherein a first boundary lies within the first area and a second boundary lies within the second area.