将连续变化的模拟信号转换为离散的数字信号的器件。真实世界的模拟信号，例如温度、压力、声音或者图像等，需要转换成更容易储存、处理和发射的数字形式。模/数转换器可以实现这个功能，在各种不同的产品中都可以找到它的身影(A device that converts a continuously changing analog signal into a discrete digital signal. Analog signals in the real world, such as temperature, pressure, sound, or images, need to be converted into more easily stored, processed and transmitted digital forms. The analog / digital converter can achieve this function, and it can be found in a variety of different products)