数显脉搏测试仪课程设计

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1、目录摘要..........................................................................3第一章绪论....................................................................41.1心率测试的意义..............................................................41.2心率测试仪的组成框图........................................................41

2、.3心率测试的基本过程..........................................................5第二章基础知识介绍.......................................................62.1PVdF传感器............................................................62.1.1敏感部分..........................................................62.1.2电荷放大器.............

3、...........................................72.2555定时器.............................................................72.2.1555定时器的基本功能.............................................72.2.2555组成的基本电路及应用........................................92.3十进制加法计数器74160.............................................

4、....102.4锁存器74LS373.........................................................102.5显示译码器74LS48......................................................112.5.1译码驱动器.......................................................112.5.2发光二极管显示器.................................................132.6数值比较器74LS85....

5、...................................................132.6.174LS85的逻辑功能图和引脚图......................................132.6.274LS85实现的逻辑功能............................................14第三章电路设计.............................................................153.1传感器模块.........................................

6、....................153.1.1传感器的选择......................................................153.2放大模块................................................................153.2.1放大电路.........................................................153.3整形模块............................................................

7、...163.3.1电路图............................................................163.3.2电压比较器......................................................173.3.3单稳态触发器....................................................173.4计数模块.....