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近年来,IBM-PC/XT微型计算机及其兼容机(以下简称PC机)的应用在我国迅速推广起来.由于PC机的操作系统功能强,高级语言灵活,用于各种领域的应用软件品种繁多,在很大程度上取代了16位小型计算机.PC机不仅在事务管理、汉字处理上显示了极大的优越性,而且在数据采集、信号处理等方面的功能也逐渐为人们所认识.由于各种数据采集的门类繁杂,使用要求和性能指标不一,已在微机市场上出售的几种PC机的A/D、D/A变换器很难适应不同用户的要求.这些通用变换器大都采样频率偏低,通道偏多,性能价格比偏低,使得用户不得不自己去配接专用的数据采集设备及其接口.
In recent years, the application of IBM-PC / XT microcomputers and their compatibles (hereinafter referred to as PC) is rapidly popularized in our country.Because of the powerful operating system of the PC and the high-level language flexibility, the application software varieties for various fields Many, to a large extent, replaced 16 small computers.PC not only in business management, Chinese characters show great superiority, but also in data acquisition, signal processing and other aspects of the function is gradually recognized. Due to the variety of data acquisition, different requirements and different performance indicators, A / D and D / A converters of several types of PCs that have been sold in the microcomputer market are very difficult to meet the requirements of different users. Most of the sampling frequency is low, the channel is too much, low performance-price ratio, making the user had to go with their own dedicated data acquisition equipment and its interface.