电子课程设计小结---数字温度计.doc

目录 数字温度表任务书···················································1 绪论································································4 第一章 电路仿真（可编程定时器）············································5 第二章 方案论证与选择·····················································5 第三章 框图设计····························································6 第四章 电路设计····························································6 4.1 电路说明······························································7 4.2 主体电路图····························································8 4.3. 模拟电路部分··························································9 4.3.1 温度采集与处理电路·············································10 4.3.2 AD590功能及特性···············································11 4.3.3 稳压电路·························································11 4.4 数字电路部分···························································12 4.4.1 AD转换、译码和驱动部分·······································12 4.4.2 数码管显示部分··················································13 调试与问题处理······················································14 总结与体会··························································15 附录I 元器件清单·························································16 附录II 实物线路图························································17 参考文献···························································17 电子技术课程设计任务书 课题名称 数字式温度表电路 一、设计目的 根据常用的电子技术知识，以及可获得的技术书籍与电子文档，初步形成电子设计过程中收集、阅读及应用技术资料的能力；熟悉电子系统设计的一般流程；掌握分析电路原理，工程结算及对主要技术性能进行测试的常见方法；最终完成从设计图纸到实物搭建的整个过程； 本课题具体目的： 掌握Multisim 软件对电路进行仿真； 掌握利用中规模集成电路进行可编程计数器的设计； 了解大规模专用集成电路的组成； 了解半导体温度传感器的工作原理； 掌握利用大规模集成电路设计数字式温度表电路和调试的方法。 二、设计内容与要求 1.软件仿真部分 课题：可编程计时器 要求： 定时范围为1~99秒，定时时间可自由设置； 定时器设有启动按钮、停止按钮和复位按钮。按下启动按钮，开始计时；按下停止按钮，中止计时；复位后定时器清零； 定时启动后有指示电路，表明定时开始工作； 定时结束后，自动复位整个电路状态； 数码管显示流逝的时间； 用Multisim软件对所设计电路进行仿真验证。 参考方案： 2.硬件设计部分 课题：数字式温度表电路设计 要求： 要求温度测量范围为－55°C～150°C；显示采用三位半LED显示，自动显示正、负号；取样速频率约为6Hz；准确度±1％，±1字； 工作温度范围0~40°C,电源为±5V； 画出电路图，写出完整的报告； 用面包板搭出电路，并调试之。 参考方案： 四、设计报告内容要求 1.写出你考虑该问题的基本