Patent ID: 11953533
Assignee: CAPITAL ONE SERVICES, LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 20:
21. The capacitive sensor of claim 19, wherein:
the signal generator is configured to apply a second electrical signal step at the input or at the output of the first capacitor to induce a third voltage transient response in the first DC voltage, wherein the third voltage transient response is in a direction opposite to the first voltage transient response,
the signal generator is configured to apply the second electrical signal step at the input or at the output of the second capacitor to induce a fourth voltage transient response in the second DC voltage, wherein the fourth voltage transient response is in a direction opposite to the second voltage transient response, and
the diagnostic circuit is configured to detect the fault in the capacitive sensor by measuring a second time constant of the differential signal that corresponds to the third and the fourth voltage transient responses and detect the fault based on the first time constant and the second time constant.