| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit for detecting a temperature capable of responding to various temperature characteristics and output D ranges and capable of detecting a temperature with relative precision of approximately two bias voltage sources B1, B2 by outputting a voltage corresponding to a difference between two bias voltages Vin, Vbias having different temperature characteristics from each other by an inverted amplifier 11 with respect to the two bias voltages. SOLUTION: The bias voltage Vin having steep temperature characteristics is supplied to an inverted input terminal of the inverted amplifier 11 through a resistor R1. A resistor R2 is interposed between the inverted input terminal and an output terminal of the inverted amplifier 11. Output is supplied to a non-inverted input terminal of a non-inverted amplifier 12, and an inverted input terminal of the non-inverted amplifier 12 is connected with a reference potential through a resistor R3 and is connected with an output terminal through a resistor R4. Thereby when resistance values of the resistors R1, R2 are appropriately set, desired temperature characteristics are obtained. And when resistance values of the resistors R3, R4 are appropriately set, temperature characteristics obtained by the inverted amplifier 11 can be a desired output voltage value. |
