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09届 分类号:
单位代码:
毕业论文(设计)
姓 名
学 号
年 级 200
专 业
系 (院)
指导教师
2010年月日
ABSTARCT
With the continuous development of science and technology, promote learning science, science and technology, knowledge of the variety of means. With a tool for Qiangda, which has been widely used in all kinds of intelligence and knowledge contests occasions. But Qiangda is used for lower frequency, and some production complex or low reliability, and reduced interest. As a unit, if the purchase is a Qiangda .Although the economy can bear, each year the number is extremely small, because of the long-term storage (electronic devices) Qiangda for damage to the purchase of the trouble and timeliness of activities, The development will be affected, so this Qiangda is designed .
The figure vies for the answering device by the subject circuit and expands the circuit to make up . Have priority in code circuit , latch , decipher circuit and export the input signal of the entrant team on the display; Starting the warning circuit with the control circuit and hosts switch, two the above-mentioned parts make up the subject circuit. Through timing circuit and decipher second signal function while outputs and realizes counting on the displaying that pulse produce circuit, form and expand the circuit.
Keywords: Vie for answering the circuit?? Timing circuit?? Warning circuit????Time sequence controlling目录
摘要……………………………………………………………………Ⅰ
Abstract…………………………………………………………………Ⅱ
1绪论……………………………………………………………………Ⅲ
1.1课题研究的相关背景……………………………………………1
1.2选题的目的和意义………………………………………………1
1.3课题研究的内容…………………………………………………1
1.4国内外研究现状…………………………………………………2
1.5抢答器目前存在的主要问题……………………………………3
2抢答器的系统概述…………………………………………………4
2.1抢答器的系统功能简介…………………………………………4
2.2抢答器的工作原理简介…………………………………………4
2.3抢答器系统的需求分析…………………………………………5
2.4抢答器的工作流程………………………………………………5
2.5抢答器的工作过程………
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