Patent ID: 11861102
Assignee: DIEHL AKO STIFTUNG & CO. KG
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A method for adjusting a scanning frequency of a capacitive touch-sensitive switch having a capacitive sensor element and a sensor circuit, the method comprising:
operating the touch-sensitive switch by using a first measurement method and at a scanning frequency having been selected from a group of available scanning frequencies;
detecting measurement signals of the sensor circuit, and carrying out the detection of the measurement signals by including a step of generating an amplitude/time graph;
checking whether the detected measurement signals contain or could contain a critical alias effect, and carrying out the check as to whether the detected measurement signals contain or could contain a critical alias effect by including a step of converting the generated amplitude/time graph into an amplitude/frequency graph and checking whether the amplitude/frequency graph contains a peak;
setting the scanning frequency as a selection frequency for a detection operating mode of the touch-sensitive switch when no critical alias effect and no possibility of a critical alias effect are identified during the check; and
not setting the scanning frequency as the selection frequency when no peak is identified during the check as to whether the amplitude/frequency graph contains a peak.