Patent ID: 11966543
Assignee: BSH HAUSGERäTE GMBH
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 0:
1. A household appliance operating device, comprising:
a sensor surface;
a signal generator for providing a control signal with a predetermined frequency;
an evaluation device configured to provide a sensor signal being dependent on a capacitance of said sensor surface;
a controller configured to determine measuring noise on said evaluation device at different predetermined frequencies and to select a frequency of the control signal in order to determine the sensor signal in dependence on the measuring noise determined, said controller configured to determine the measuring noise using a secondary frequency only when the measuring noise determined using a primary frequency exceeds a predetermined threshold, the threshold being absolute or relative with respect to the sensor signal;
said controller additionally configured to interrupt a determination of the sensor signal when said sensor surface is excited with a primary frequency, in order to determine the measuring noise when said sensor surface is excited with a secondary frequency, said interruptions taking place periodically; and
a driver configured to control a consumer in dependence on a determined touch.