数字日历倒计时电路的设计.doc
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本科毕业论文(设计)
论文题目 : 数字日历倒计时电路的设计
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年 月 日
数字日历倒计时电路的设计
The Design Of Digital Calendar Countdown Circuit
2013年05月08日摘 要
随着科学技术的快速发展,人们对电子产品的要求更是越来越高。为适应发展,数字日历已成为人们日常生活中必不可少的必需品,给人们的生活、学习、工作、娱乐带来极大的方便。由于数字集成电路技术的发展,使得数字钟具有走时准确、性能稳定、携带方便等优点,它还用于计时、自动报时及自动控制等各个领域。
本文主要的研究内容是时分秒的倒计时以及独立的时间显示,首先要设计一个能自动产生稳定时间脉冲的信号源;还需要有一个使高频脉冲信号变成适合于计时的低频脉冲信号的低频器电路,即频率为1KZ的“秒脉冲”信号,再经过分频器输出的秒脉冲信号到计数器中进行计数;最后,采用Multisim软件进行了仿真。主要研究结论如下:
(1)能进行日(0~99)、时、分、秒的倒计时以及独立的时电路。
(2)能进行倒计时的预置和快速校时,每到整十日,发出提示信号。
关键词:数字日历;倒计时; Multisim
Abstract
With the rapid development of science and technology, people demand for electronic products is more and more high. For adapting to the development of the digital calendar has become people indispensable necessities in daily life, to peoples life, study, work, entertainment, bring great convenience. Because the development of digital integrated circuit technology, digital clock walking has advantages of accurate, stable performance, easy to carry, it is also used in timing, automatic feed and automatic control and other fields.
This article main research content of minutes countdown, and independent of time, according to first design a can automatically generate stable time pulse signal; Also need to have a high frequency pulse signal into suitable for timing of low frequency pulse signal of low frequency circuit, the frequency of 1 kz second pulse signal, again through the frequency divider output pulse signal to the counter to count the seconds; Finally, the Multisim software is used for the simulation. Main research conclusion is as follows:
(1) to date (0 ~ 99), hours, minutes, seconds countdown, and independent of the circuit.
(2) able to preset countdown and rapid school, every ten days, signal hint.
Keywords:Digital calendar; The countdown;Multisim
目 录
1 绪 论 1
1.1 研究的目的和意义 1
1.2 国内外研究现状 1
1.3 研究内容
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