模拟电子课程设计..doc

PAGE 2 摘 要 多功能数字钟具有时间显示、闹钟设置、环境温度测量、电网电压、电网频率显示，闹铃控制和电网电压的过压、欠压报警等功能,深受人们欢迎。 数字钟是采用数字电路实现对.时,分,秒.数字显示的计时装置,广泛用于个人家庭,车站, 码头办公室等公共场所,成为人们日常生活中不可少的必需品,由于数字集成电路的发展和石英晶体振荡器的广泛应用,使得数字钟的精度,远远超过老式钟表, 钟表的数字化给人们生产生活带来了极大的方便，而且大大地扩展了钟表原先的报时功能。诸如定时自动报警、按时自动打铃、时间程序自动控制、定时广播、自动起闭路灯、定时开关烘箱、通断动力设备、甚至各种定时电气的自动启用等，所有这些，都是以钟表数字化为基础的。因此，研究数字钟及扩大其应用，有着非常现实的意义。 关键词 数字钟；数字集成电路；振荡器 ABSTRACT A digital clock is a kind of digital circuit technology, minutes and seconds when the timing device, and the mechanical clock is higher than the accuracy and intuitive, and no machinery, has more longer service life, so it has been widely used. From the principle of digital clock is a kind of typical digital circuits, including the assembly logic circuit and the sequential circuits. At present, a digital clock function is more and more strong, and a variety of special options. Applicable for automatic digital clock rung, automatic broadcasting, also suitable for electricity, water and automatic control and electrical equipment. It is by several children clock circuit, timing circuit, amplifier circuit, the power circuit implementation. In order to simplify the circuit structure, a digital clock circuit and timing circuits using direct connection between decoding technology. With simple structure, reliable operation, long service life, change the setting time for easy and manufacturing cost etc. To learn from the point of view, there are mainly introduced in small scale integrated circuit design method of digital clock。 Key words Digital clock；Digital integrated circuit；Oscillator ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 装 ┊ ┊ ┊ ┊ ┊ 订 ┊ ┊ ┊ ┊ ┊ 线 ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ ┊ 吉林建工学院城建学院电气信息工程系课程设计论文纸 共 NUMPAGES 27 页 第 PAGE 18 页 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc329960204 摘 要 PAGEREF _Toc329960204 \h 1 HYPERLINK \l _Toc329960205 ABSTRACT PAGEREF _Toc329960205 \h 2 HYPERLINK \l _Toc329960206 第1章 绪论 PAGEREF _Toc329960206 \h 3 HYPERLINK \l _Toc329960207