Abstract: The invention relates to an electronic stylus for performing inputs to a digital input device with an electrically capacitively acting touch-sensitive input surface, wherein the electronic stylus is configured for assuming at least two states (101, 102) with different electrical capacitances (114, 113) and for switching alternately between said different states (101, 102) with different electrical capacitances (114, 113), characterised in that the electronic stylus is configured for carrying out the switching (112) between states (101, 102) of the electronic stylus with different electric capacitances (114, 113) such that the state duration (116) for a first state (101) with a first electrical capacitance (114) is longer than the state duration (117) for a second state (102) with a second electrical capacitance (113).

Abstract: A device for controlling and regulating a DC voltage converter. The device may have one or more power output stages and a control unit with a signal ground line. The one or more power output stages and the control line have a mutual ground potential. A switch for electrically disconnecting the signal ground line is provided. The switch is opened, when the DC voltage converter is active and the switch is closed, when the DC voltage converter is inactive.

Abstract: A device for controlling and regulating a DC voltage converter. The device may have one or more power output stages and a control unit with a signal ground line. The one or more power output stages and the control line have a mutual ground potential. A switch for electrically disconnecting the signal ground line is provided. The switch is opened, when the DC voltage converter is active and the switch is closed, when the DC voltage converter is inactive.

Abstract: A method and device for insulation monitoring of an electrically insulated DC network by measuring of the insulation resistance using galvanic isolation between a measuring resistor which is connected to ground, and a measuring pulse generator, and a measurement-data acquisition device, which eliminates some of the effect that noise in the DC network would otherwise have on the measurement.

Abstract: A method and device for insulation monitoring of an electrically insulated DC network by measuring of the insulation resistance using galvanic isolation between a measuring resistor which is connected to ground, and a measuring pulse generator, and a measurement-data acquisition device, which eliminates some of the effect that noise in the DC network would otherwise have on the measurement.