目录 1.引言.......................................................................................4 1.1设计目的...............................................................................5 1.2设计要求..............................................................................5 2. 电路分析...............................................................................6 2.1设计电路图..........................................................................6 2.2电路分析..............................................................................6 2.2.1时钟脉冲发生器...............................................................7 2.2.2计数器...............................................................................9 2.2.3译码器..............................................................................11 2.2.4数码管..............................................................................12 3. 设计步骤...............................................................................13 3.1设备与元件..........................................................................13 3.2测试调整.............................................................................13 3.2.1时钟发生器的测试..........................................................13 3.2.2计数器的测试...................................................................13 3.2.3电子秒表的整体测试......................................................14 3.2.4电子秒表准确度的测试..................................................14 4. 参考文献..............................................................................15 5. 设计心得..............................................................................16
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