【正文】 onder， timing， counting， alarm 黃河科技學(xué)院畢業(yè)設(shè)計(jì)說明書 第 IV頁 目 錄 1 緒論 ...................................................................................................................................... 1 課題背景及目的 ....................................................................................................... 1 國內(nèi)外研究狀況 ....................................................................................................... 1 課題研究方法 ........................................................................................................... 2 論文構(gòu)成及研究內(nèi)容 ............................................................................................... 3 2 模塊電路設(shè)計(jì) ...................................................................................................................... 4 搶答電路 ................................................................................................................... 4 顯示電路 ................................................................................................................... 5 計(jì)時電路 ................................................................................................................... 7 報警電路 ................................................................................................................... 9 聲音報警電路 .................................................................................................. 9 光報警電路 ...................................................................................................... 9 3 總體電路設(shè)計(jì) .................................................................................................................... 11 4 主要芯片介紹 .................................................................................................................... 13 74LS175 寄存器 ..................................................................................................... 13 74LS192 計(jì)數(shù)器 ..................................................................................................... 14 555 定時器 .............................................................................................................. 15 74LS148 .................................................................................................................. 16 7448 譯碼器 ............................................................................................................ 17 5 仿真過程及結(jié)果 ................................................................................................................ 19 仿真結(jié)果 ................................................................................................................... 19 設(shè)計(jì)和使用說明 ....................................................................................................... 21 總結(jié) .......................................................................................................................................... 22 黃河科技學(xué)院畢業(yè)設(shè)計(jì)說明書 第 V頁 致謝 .......................................................................................................................................... 23 參考文獻(xiàn) .................................................................................................................................. 24 黃河科技學(xué)院畢業(yè)設(shè)計(jì)說明書 第 1 頁 1 緒 論 課題背景及目的 工廠、學(xué)校和電視臺等很多單位常舉辦各種智力競賽，在搶答的環(huán)節(jié)中，舉辦方多數(shù)采用讓選手通過舉答題板的方法判斷選手的搶答權(quán)，這在某種程度上會因?yàn)橹鞒秩说闹饔^判斷造成比賽的不公平，而搶答器能迅速、客觀地分辨出最先獲得發(fā)言權(quán)的選手。綜合運(yùn)用定時器，計(jì)數(shù)器，編碼器，譯碼器，鎖存器等元器件組 合而成。黃河科技學(xué)院畢業(yè)設(shè)計(jì)說明書 第 I 頁 畢業(yè)設(shè)計(jì)說明書 帶有語音播報的多路數(shù)字顯示競爭電路設(shè)計(jì) 摘 要 隨著各種益智類節(jié)目的不斷發(fā)展，越來越多的競賽搶答器被用在了其中，多路數(shù)字顯示競爭電路即 搶答器是一種典型的數(shù)字電路，它包括了組合邏輯電路和時序邏輯電路。該搶答器除具有基本的搶答功能外，還具有定時、計(jì)時、報警功能。 關(guān)鍵詞： 搶答器，定時，計(jì)時，報警 黃河科技學(xué)院畢業(yè)設(shè)計(jì)說明書 第 II 頁 黃河科技學(xué)院畢業(yè)設(shè)計(jì)說明書 第 III 頁 The many road digital display circuit design petition Author: Shi Xiaoyun Tutor: Yue Liqin Abstract With the continuous development of a variety of educational programs， contest Responder is increasingly being used in it .The responder is a typical digital circuit， including a bination of logic circuits and sequential logic circuit. Circuit structure of a variety of forms， can make use of simple and nongate structure can also be used to trigger position. In this paper， the electric circuit and designing thought of an answ