Temperature characteristic correction device, temperature characteristic correction formula determination method, electronic apparatus, and control circuit

1. A temperature characteristic correction device adapted to correct a temperature characteristic of an electronic device,

the temperature characteristic correction device:

calculates a peak correction characteristic approximating a peak waveform having a peak value in a second range included in a first range of the temperature characteristic using a first formula, and a correction characteristic approximating a waveform continuing in the first range of the temperature characteristic using a second formula that is based upon the peak waveform;

calculates a total correction amount from the peak correction characteristic and the correction characteristic; and

corrects a zero point of the temperature characteristic using the total correction amount,

wherein an electrical signal indicative of a measured physical quantity associated with the electronic device is modified based upon the corrected zero point.

2. The temperature characteristic correction device according to claim 1 ,

wherein the temperature characteristic correction device receives a parameter signal for identifying temperature, calculates the total correction amount in accordance with the temperature, and corrects the temperature characteristic.

3. The temperature characteristic correction device according to claim 1 , wherein

the first formula is an exponential function.

4. The temperature characteristic correction device according to claim 3 , wherein

the second formula is a polynomial.

5. The temperature characteristic correction device according to claim 1 , wherein

in a case in which a plurality of the peak waveforms exist in the first range, the peak correction characteristics are separately set using the first formula in a descending order of a ratio of a height of the peak to a width of the peak.

6. The temperature characteristic correction device according to claim 1 ,

wherein the temperature characteristic correction device

performs a filtering process on the temperature characteristic of the electronic device to separate the waveform continuing in the first range and the peak waveform from each other, and

calculates the peak correction characteristic using the first formula based on the peak waveform separated.

7. An electronic device comprising:

the temperature characteristic correction device according to claim 1 incorporated in the electronic device.

8. An electronic apparatus comprising:

the electronic device according to claim 7 .

9. A moving object comprising:

the electronic device according to claim 7 .

10. A temperature characteristic correction formula determination method comprising:

changing temperature to identify a temperature characteristic of an electronic device;

obtaining a peak correction characteristic by approximating a peak waveform having a peak value in a second range included in a first range of the temperature characteristic using a first formula;

obtaining a correction characteristic by approximating a waveform continuing in the first range of the temperature characteristic using a second formula that is based upon the peak waveform;

obtaining a computational formula for calculating a total correction amount from the peak correction characteristic and the correction characteristic; and

correcting a zero point of the temperature characteristic using the total correction amount.

11. A control circuit adapted to correct a temperature characteristic of an electronic device,

the control circuit:

calculates a peak correction characteristic approximating a peak waveform having a peak value in a second range included in a first range of the temperature characteristic using a first formula, and a correction characteristic approximating a waveform continuing in the first range of the temperature characteristic using a second formula that is based upon the peak waveform;

calculates a total correction amount from the peak correction characteristic and the correction characteristic; and

corrects a zero point of the temperature characteristic using the total correction amount.