Patent ID: 11959947
Assignee: KNORR-BREMSE SYSTEME FUER NUTZFAHRZEUGE GMBH
Field: Measurement (Instruments)
Classification: CPC G  B  H | IPC B  G

Claim 12:
13. A method for testing an overvoltage protection circuit for a control unit for a vehicle, the method comprising:
applying an electrical test voltage with a first voltage level to a test terminal of the overvoltage protection circuit, wherein the overvoltage protection circuit includes:
an input terminal for applying an electrical input voltage, a test terminal for the application of an electrical test voltage, and an output terminal for providing an electrical output voltage to supply the control unit;
a reference device to provide a reference voltage using the input voltage;
a dividing device to provide a divided voltage using the output voltage;
a control device to provide a regulation signal using the reference voltage and the divided voltage;
a regulation device connected between the input terminal and the output terminal, wherein the regulation device is configured to provide the output voltage using the input voltage and the regulation signal; and
a modification device to modify a value of the divided voltage using the test voltage;

capturing a first electrical output voltage in response to the electrical test voltage with the first voltage level;
applying an electrical test voltage with a second voltage level to the test terminal of the overvoltage protection circuit, wherein the second voltage level is lower than the first voltage level;
capturing a second electrical output voltage in response to the electrical test voltage with the second voltage level; and
checking whether the captured first output voltage and the captured second output voltage satisfy at least one test criterion to generate a test result.