| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit for measuring a temperature capable of accurately measuring a temperature. SOLUTION: When a first current having an amount indicated by a controller 17 is flowed from a current D/A converter 13 to a thermistor 11, an A/D converter 15 measures a drop of a voltage of the thermistor 11, A/D-converts, and supplies a conversion result to the controller 17. The controller 17 specifies a temperature range of the thermistor 11 from the conversion result and the amount of the first current, and indicates the current D/A converter 13 to flow a second current having an amount corresponding to the temperature range. When the second current is flowed from the current D/A converter 13 to the thermistor 11, the A/D converter 15 measures a drop of a voltage of the thermistor 11, A/D-converts, and supplies a conversion result to the controller 17. The controller specifies a temperature of the thermistor 11 from the conversion result and the amount of the first current. |
