数电课程设计报告——八路数字式抢答器.docx

课 程 设 计 报 告设计题目：八路数字抢答器的设计与实现班级：学 号：姓 名： 指导教师：设计时间：2012年7月摘 要抢答器是为智力竞赛者答题时进行抢答而设计的一种优先判决器电路，广泛应用于各种知识竞赛、文娱活动等场合。本次课程设计的抢答器通过选手按键、数码显示等功能准确、公正并且直观的判断出选手抢答的优先顺序。本次课程设计的数字抢答器由主体电路和扩展电路共同组成。优先编码器、锁存器、译码电路完成将参赛队的输入信号在显示器上输出的功能；主体电路由用控制电路和主持人开关启动报警电路这两部分组成。定时电路和译码电路将秒脉冲产生的信号在显示器上完成输出计时的功能，这些部分构成扩展电路。该抢答器电路对犯规抢答者（包括提前抢答和超时抢答）除有声、光报警外，还有显示抢答犯规者序号功能。同时本抢答器仅用数字芯片便实现了抢答并显示编号的功能，同时自动锁存优先编号使得本抢答器具有显示直观的特点，配合声音提示，使得抢答器效果更为生动。抢答器的设计利用Multisim7完成了原理图设计和电路仿真，具有数字显示、倒计时显示、编码译码功能，应用效果良好。关键词：抢答器，锁存，仿真目 录摘要 ·····················································2第1章 概述 ··············································第2章 课程设计任务及要求································· 2.1设计任务············································ 2.2设计要求············································第3章 系统设计··········································· 3.1方案论证············································ 3.2系统设计············································ 3.2.1 结构框图及说明································· 3.2.2 系统原理图及工作原理··························· 3.3单元电路设计········································ 3.3.1 单元电路工作原理································· 3.3.2 元件参数选择·····································第4章 软件仿真··········································· 4.1仿真电路图········································· 4.2仿真过程··········································· 4.3仿真结果···········································第5章 安装调试··········································· 5.1安装调试过程·······································5.2故障分析···········································第6章 结论···············································第7章 使用仪器设备清单···································参考文献··················································收获、体会和建议··········································第1章 概述 当今的社会竞争日益激烈，选拔人才，评选优胜，知识竞赛之类的活动愈加频繁，因此，在许多比赛活动中为了准确，公正的进行每一场比赛，特别设置了一台具有显示第一抢答者并锁定、犯规警告等多种功能的抢答器，该设计针对各种要求设计出可供八名选手参赛使用的数字式竞赛抢答器，适用于各大中小电视台，学校等单位举行的智力竞赛。抢答器是一种应用非常广泛的设备，在各种竞赛、抢答场合中，它能迅速、客观地分辨出最先获得发言权的选手。此数字抢答器由主体电路与扩展电路组成。优先编码电路、锁存器、译码电路将参赛选手的输入信号在显示器上输出；用控制电路和主持人开关启动