数字电路逻辑模拟软件DCLSS的研究与实现

Research and Implementation of the Logic Simulation Software for Digital Circuit

为了能够在微机上用软件实现不依赖于特定实验装置的数字电路实验 ,开发了基于Windows环境下的数字电路逻辑模拟软件DCLSS .软件采用图形输入方式 ,元件模型为五值、三强度及上下跳变延迟 ,模拟算法采用表驱动方法、时间映射方式、门级和功能级混合模拟 .该软件能够模拟组合逻辑电路、同步和异步时序逻辑电路及部分GAL等可编程逻辑元件组成的电路 .

The design and implementaion of Windows environment-based digital circuit logic simulation software (DCLSS) are presented in order to be able to conduct experiments of Digital Circuit course in a computer.Graph approach for logic circuit input is adopted by the DCLSS, device model is based on five-value, three-strength,and up/down-jump delay model,simulation algorithm is on table-event method,time-mapping technique, and hybrid simulation of gate and function block level.The software is capable of simulating circuits combined with combinational circuits, synchronous and asynchronous sequential logic circuits, and some programmable logic devices.The paper has emphasized on the decription of device model and simulation algorithm applied in the software.