Patent ID: 11927645
Assignee: INFINEON TECHNOLOGIES AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 24:
25. The capacitive sensor of claim 20, further comprising:
an analog-to-digital converter configured to receive and convert the differential signal into a digital signal, wherein the digital signal responsive to the AC signal is a periodic signal having a maximum peak value and a minimum peak value,
wherein, when the AC signal is a pull-in signal, the diagnostic circuit is configured to detect a first fault on a first condition that the maximum peak value is less than a maximum threshold value and that the minimum peak value is greater than a minimum threshold value, and
wherein, when the AC signal is a non-pull-in signal, the diagnostic circuit is configured to detect a second fault on a second condition that the maximum peak value is equal to or greater than the maximum threshold value or the minimum peak value is equal to or less than the minimum threshold value.