TEMPERATURE SENSOR CIRCUIT

• Main Authors: TANAKA MASATOMO, SUWABE HIROYUKI, ABE TOMONARI
• Format: Patent
• Language: English; Japanese
• Published: 20.10.2016
• Subjects: MEASURING; MEASURING QUANTITY OF HEAT; MEASURING TEMPERATURE; PHYSICS; TESTING; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR

PROBLEM TO BE SOLVED: To provide a temperature sensor circuit capable of reducing a measurement error of temperature.SOLUTION: A temperature sensor circuit comprises: a reference voltage circuit VC for outputting reference voltage Vref; and a first amplifier circuit C1 into a first input end of which the reference voltage is input, a first signal S1 being fed back to a second input end, and which outputs the first signal S1 so that the first signal S1 equals to the reference voltage Vref. The temperature sensor circuit comprises: a diode D of which a cathode is connected with first electric potential; and a voltage division circuit DC of which the other end is connected with an anode of the diode and which outputs potential division voltage VD. The temperature sensor circuit comprises a second amplifier circuit C2 into a first input end of which the first signal S1 is input, the potential division voltage VD being input into a second input end, an output end being connected with one end of the voltage division circuit, and which outputs a second signal S2 so that the potential division voltage VD is equal to the first signal S1. The temperature sensor circuit comprises a measuring circuit MC that calculates voltage difference between the first signal S1 and the second signal S2, and outputs an output signal SO on the basis of the calculation result.SELECTED DRAWING: Figure 1 【課題】温度の測定誤差を低減することが可能な温度センサ回路を提供する。【解決手段】基準電圧Ｖｒｅｆを出力する基準電圧回路ＶＣを備え、第１の入力端に基準電圧が入力され、第２の入力端に第１の信号Ｓ１を帰還し、第１の信号Ｓ１が基準電圧Ｖｒｅｆと等しくなるように第１の信号Ｓ１を出力する第１のアンプ回路Ｃ１を備える。カソードが第１の電位に接続されたダイオードＤを備え、他端がダイオードのアノードと接続され、分圧電圧ＤＣを出力する分圧回路ＤＣを備える。第１の入力端に第１の信号Ｓ１が入力され、第２の入力端に分圧電圧ＶＤが入力され、出力端が分圧回路の一端と接続され、分圧電圧ＶＤが第１の信号Ｓ１と等しくなるように第２の信号Ｓ２を出力する第２のアンプ回路Ｃ２を備える。第１の信号Ｓ１と第２の信号Ｓ２との電圧差を算出し、この算出結果に基づいて出力信号ＳＯを出力する測定回路ＭＣを備える。【選択図】図１