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利用电子线路仿真分析平台Electronics Workbench(简称EWB)在组合逻辑电路及时序逻辑电路实验课的仿真分析中需要进行验证性实验的设计。组合逻辑电路:七段译码显示电路,8线-3线优先编码器功能测试;利用EWB所提供的字发生器(Word generator)及显示仪器中的发光元件测试RS、JK、D触发器的功能,仿真分析数据的串行—并行转换,二分频的验证;利用74160采用复位法及置位法接成七进制计数器与采用74190置位法接成七进制计数器进行比较分析,明确复位法与置位法的区别,搞清置位法中预置数操作与时钟脉冲有关与无关设计设计方法的不同。
The use of electronic circuit simulation platform Electronics Workbench (referred to as EWB) in the combinational logic circuits and sequential logic circuit simulation experiments need to verify the design of experiments. Combinational logic circuit: seven sections of decoding display circuit, 8 line -3 line priority encoder function test; using the word generator (Word generator) provided by EWB and the light-emitting components in the display instrument to test RS, JK, D flip-flop Function, simulation analysis of data serial - parallel conversion, two-way frequency verification; the use of 74160 reset method and setting method into a seven-digit counter and the use of 74190 set into a seven-digit counter for comparative analysis, clear The difference between reset method and set method to find out the difference between the preset number of operations in the set bit method and the clock pulse and the irrelevant design design method.