Capacitive touch switch, circuit configuration for a capacitive touch switch and control device for an electronic domestic appliance with at least one capacitive touch switch

Abstract

A capacitive touch switch which is used, for example, in a control device for an electronic domestic appliance, includes a sensor area as part of a capacitive sensor element having a capacitance which changes when touched. A measuring electrode, which is coupled to the sensor area, is disposed on a printed circuit board and is at a first potential. An additional electrode, which is disposed near the measuring electrode, likewise on the printed circuit board, is electrically insulated from the measuring electrode and is at a second potential, which is different from the first potential. The additional electrode brings about a shielding of the measuring electrode and thus an output signal of an associated sensor circuit that is less sensitive to interference. A circuit configuration for a capacitive touch switch and a control device for an electronic domestic appliance, are also provided.

Dependencies are inferred from the claim text.