说明：  在一些温控系统电路中，广泛采用的是通过热电偶、热电阻或PN结测温电路经过相应的信号调理电路，转换成A／D转换器能接收的模拟量，再经过采样／保持电路进行A／D转换，最终送入单片机及其相应的外围电路，完成监控
(In some temperature control system circuit, widely used by thermocouple, thermal resistance or PN junction temperature measurement circuit through the appropriate signal conditioning circuitry, converted into A/D converter to receive the analog, and then through the sample/hold circuit A/D conversion, eventually into the microcontroller and its corresponding peripheral circuits, complete control)