一、概述在生产过程自动控制与各种智能仪器仪表中,常常采用微型计算机来进行实时控制或实时数据处理。由于计算机所处理的信息只能是数字量,而被控的对象往往是一些连续变化的模拟量,因而在计算机输出与被控对象之间需要加数/模转换器(D/A)。目前最 First, an overview Automatic control in the production process and a variety of intelligent instrumentation, often using a microcomputer for real-time control or real-time data processing. Since the information processed by a computer can only be a digital quantity, and the controlled object is often a continuously changing analog quantity, an adder / digital converter (D / A) is required between the computer output and the controlled object. Currently the most