用DES理论测试数模混合电路

Testing Mixed-Signal Circuit With DES Theory

针对数模混合电路测试时所遇到的难点 ,尝试寻找一个普遍通用的测试方法。由于数模混合电路具备DES的特点 ,文中采用近来发展的DES理论对数模混合电路进行可测性分析 ,讨论该类电路可测试的基本条件。针对电路检测时的不同要求和实际情况 ,研究了测试速度较快、测试成本较低的方法 ,且该法可用一定的算法在计算机上实现 ,最后用实例进行了方法验证。

The paper tries to find a common method aiming at the difficulties while testing mixed-signal circuits. Because mixed-signal circuits possess charades of the DES, the article analyses the testability of those circuits with DES theory which developed recently, and researches the basic terms of the circuit testability. According to the different request and exact conditions while the circuit is tested, the paper studies a faster and lower cost test method, which can be realized on computer through certain arithmetics. At last the article presents a example to illustrate the method.