（一）前言 目前,我国中小规模的数字集成电路的应用已相当广泛。不但在各种数字计算机中大量应用,而且在各种数字式仪表、自动化仪表及程序控制中也得到了相当广泛的应用。在数字电路的推广和应用中,电路的测试,测试设备的设计和制造是一个十分关键的问题。在生产数字电路的工厂中,由于要对质量进行控制,要对出厂产品进行分类和检验,所以必须对元件进行测试,在电子仪器的生产单位中,需对上机的数字电路元件进行老化筛选和测试,以提高电子设备的可靠性,在一些研究单位中,在研究和调试的过程中,更需对元件进行测试,以决定元件性能的优劣,以找出故障及问题所在。单位 (A) Preface At present, China’s small and medium-sized digital integrated circuits have been widely used. Not only in a variety of digital computer applications, but also in a variety of digital instrumentation, automation instrumentation and program control has also been a very wide range of applications. In the popularization and application of digital circuits, the design of circuit test and test equipment is a key issue. In the factories producing digital circuits, the components must be tested in order to control the quality and classify and test the manufactured products. In the production units of electronic equipment, the digital circuit components of the upper computer need to be aged and screened And testing to improve the reliability of electronic devices. In some research institutes, it is even more necessary to test the components in the course of researching and debugging to determine the pros and cons of component performance so as to find out the faults and problems. unit