数字抢答器设计摘要随着科学研究的不断深入，学习科学、技术、知识的手段日益增加。抢答器作为一种工具，在智力和知识竞赛场合已经得到了广泛的应用。因此，抢答器的设计成为研究的热点。本文基于 74 系列的常用集成电路设计了一种多功能数显抢答器，该抢答器除了具有基本的抢答功能之外，还具有定时报警、数显的功能。在设计的过程中考虑了八路抢答器，的电路组成、设计思路及功能。抢答器主要由抢答模块、定时模块和报警模块组成，利用Multisim10 软件对所设计的电路进行仿真，结果得到当预设过供抢答的时间，系统将完成自动倒计时。若在规定的时间内有人抢答，则计时将自动停止；若在规定的时间内无人抢答，则系统中的蜂鸣器将发响，提示主持人本轮抢答无效，实现报警功能。关键词：八路抢答器；EDA；Multisim10；报警；数显The design of digital answering racerABSTRACTWith the deepening of the scientific research, means of learning science, technology,knowledge getting more numerous.The figure vies for the answering device as a tool has beenwidely used in the intelligence and knowledge competition situation. Therefore, the design of thefigure vies for the answering device is becoming a hot spot of research. Based on common-usedseries of integrated circuit ,this paper design a multi-function digital display responder. Theanswering race’s function includes timing, counting, and alarming, besides the basic function ofan answering racer. Considered circuit composition, function and design ideas in the designprocess of the eight-way responder. The designed buzzer is mainly composed of vies to answerfirst module, timing module and alarming modul. Through the Multisim10 to carry on the designof simulation, the experimental results show when the time of buzzer has preset, the system willcomplete automatic countdown. If nobody answer the question on time, the alarm will give outsome sound, helping the host know the race in this turn is of no use, so the functi...
