用热电偶测量温度时,冷端温度补偿是不可缺少的。本热电偶冷端补偿集成块分为温度传感器和补偿电路两个部分,均已集成化,可用于实际生产中。1.动作原理和电路构成图1为传感器的工作电路。晶体管 Q_1、Q_2、Q_3发射极的面积比为2:1:1。晶体管 Q_1和Q_2的基一射之间电压 V_(BE)之差决定了流过电阻 Thermocouple temperature measurement, the cold junction temperature compensation is indispensable. The thermocouple cold junction compensation manifold is divided into two parts of the temperature sensor and compensation circuit, have been integrated, can be used in actual production. 1 action principle and circuit structure Figure 1 for the sensor circuit. The area ratio of the emitter of the transistors Q_1, Q_2, Q_3 is 2: 1: 1. The difference between the voltages V_ (BE) of the bases Q_1 and Q_2 of the transistors Q_1 and Q_2 determines the difference between the voltage