Temperature measuring circuit
The utility model relates to a temperature measuring circuit, wherein a standard resistor R2 is serially connected with a temperature measuring resistor R3, the voltage V1 across the standard resistor and the voltage V2 across the temperature measuring resistor are respectively measured, the resista...
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| Format: | Patent |
| Sprache: | chi ; eng |
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| Zusammenfassung: | The utility model relates to a temperature measuring circuit, wherein a standard resistor R2 is serially connected with a temperature measuring resistor R3, the voltage V1 across the standard resistor and the voltage V2 across the temperature measuring resistor are respectively measured, the resistance value of the temperature measuring resistor R3 is equal to V2/(V1*R2), and a temperature value to be measured is obtained according to the resistance value of the temperature measuring resistor R3. The temperature measuring circuit performs voltage comparison through using the standard resistor and the temperature measuring resistor to obtain the relation between the resistance values of the resistors; the resistance value of the standard resistor is stable, such that the resistance value of the temperature measuring resistor can be calculated; and the temperature to be measured by the temperature measuring resistor is obtained finally according to the resistance value of the temperature measuring resistor. |
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