Patent ID: 11899001
Assignee: INFINEON TECHNOLOGIES AG
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for providing calibration data for a gas sensor device,
wherein the gas sensor device comprises a gas sensitive material electrically arranged between a first and second contact region, and a control electrode which is arranged neighboring to the gas sensitive material, wherein a resistance of the gas sensitive material has a dependency on an environmental target gas concentration and has a dependency on a control voltage applicable to the control electrode,
the method comprising:
exposing the gas sensitive material of the gas sensor device to different adjusted target gas concentrations of a target gas;
determining measurement values of the resistance of the gas sensitive material between the first and second contact region in response to the adjusted target gas concentration;
determining a first gas sensor behavior model based on the measurement values of the resistance of the gas sensitive material as a function of the adjusted target gas concentration, wherein the first gas sensor behavior model comprises a first fitting function comprising a first partial fitting function corresponding only to a gas insertion phase and a second fitting function comprising a second partial fitting function corresponding only to a natural recovery phase, wherein the gas insertion phase and the natural recovery phase comprise non-overlapping time intervals;
translating the first gas sensor behavior model into a corresponding second gas sensor behavior model for the resistance of the gas sensitive material of the gas sensor device as a function of the control voltage applicable to the control electrode, wherein the second gas sensor behavior model comprises a second fitting function comprising a first partial fitting function corresponding only to the gas insertion phase and a second fitting function comprising a second partial fitting function corresponding only to the natural recovery phase;
sweeping the control voltage based on the second gas sensor behavior model over a control voltage range for providing control voltage dependent resistance data, wherein the provided control voltage dependent resistance data or data derived therefrom over a control voltage range of the gas sensor device form the calibration data for the gas sensor device;
determining, for different temperatures of at least one of the environmental target gas or the gas sensitive material, a control voltage dependent measurement value of the resistance of the gas sensitive material having, within a tolerance range, an insensitivity to the target gas concentration; and
storing the determined control voltage dependent measurement value as a baseline calibration value in a memory device accessible to a processing device, wherein the baseline calibration value is also independent of the temperature of at least one of the environmental target gas or the gas sensitive material exposed to the target gas.