目录
一、 设计目的................................................................................................................................. ... ......3
二、 设计要求................................................................................................................................. ... ......3
2.1 设计指标.........................................................................................................................................3
2.2 设计要求..........................................................................................................................................3
2.3 制作要求..........................................................................................................................................3
2.4 编写设计报告..................................................................................................................................3
三、 各单元电路设计..................................................................................................................... ... ......4
3.1 工作原理..........................................................................................................................................4
3.2 原理框图..........................................................................................................................................5
3.3 振荡器..............................................................................................................................................5
3.3.1
由石英晶体振荡器构成的
1HZ
秒脉冲信号
..........................................................................5
3.4 时间计数器电路.............................................................................................................................6
3.4.1
秒计数器的设计
......................................................................................................................7
3.4.2
分计数器的设计
......................................................................................................................7
3.4.3
时计数器电路
..........................................................................................................................8
3.5 译码驱动及显示单元的设计.........................................................................................................9
3.6 校时电路..........................................................................................................................................9
3.7 整点报时电路...............................................................................................................................10
3.7.1
论证
........................................................................................................................................10
3.7.2
实现
........................................................................................................................................10
四、 总电路设计........................................................................................................................... ... ......12
五、 元件清单............................................................................................................................... ... ......12
六、 课程设计体会....................................................................................................................... ... ......13
七、 参考文献............................................................................................................................... ... ......14