The paper introduces a thermocouple temperature transmitter which uses linear amplifier, analog multiplier, adder and voltage/ current converter to achieve linear treatment. The linear treatment method and the relative circuit design theory are given. 介绍了一种利用线性放大器、模拟乘法器、加法器及电压/电流转换器实现线性化处理的热电偶温度变送器,给出了线性处理方法及相关的电路设计原理。