Capacitive control device for a household appliance, household appliance and method for operating a capacitive control device in a household appliance

摘要

The invention relates to a capacitive control device (1) for a domestic appliance, having a capacitive sensor (2, 3, 4) with an electrical capacitance, which is generated by an operator and / or an approach due to actuation of the sensor (2, 3, 4) the operator to the sensor (2, 3, 4) is variable. A conditioning circuit (6) receives an input signal (UE) and outputs an output signal (UA) dependent on the capacitance of the sensor (2, 3, 4) on the basis of the input signal (UE). A control device (10) provides the input signal (UE) and detects the actuation and / or the approach depending on the output signal (UA) of the conditioning circuit (6). Subtraction means (15) are provided which subtract an amplitude component (B) from an amplitude (A) of the output signal (UA) and output a subtraction signal (US) as a result of the subtraction, by means of which the actuation and / or the approach is detected. The invention also relates to a household appliance and a method for operating a capacitive control device (1) in a household appliance.