本文介绍我们自己设计、试制的红外线探头中的前置放大器和供热敏电阻工作的偏置电源。这些线路具有简单易调,性能稳定的特点。经过一段时间实际应用的考验,证明它是能满足使用要求的。 This article describes the preamps and bias supplies for our thermistor work in our own designed, prototyped infrared probes. These lines have the characteristics of simple and easy to adjust, stable performance. After a period of practical application of the test to prove that it is able to meet the requirements.