毕业设计报告目 录第一章 引 言..............................................................................................................................10第二章 硬件电路设计................................................................................................................112.1 AT89C2051 主要性能....................................................................................................112.2 AT89C2051 的结构框图................................................................................................122.3 AT89C2051 的引脚说明................................................................................................132.4 复位电路......................................................................................................................15下载后可任意编辑2.5 振荡电路......................................................................................................................15第三章 基本结构模块..................................................................................................................163.1 脉搏波检测电路...........................................................................................................163.2 脉搏信号拾取电路.......................................................................................................163.3 信号放大......................................................................................................................183.4 波形整形部分..............................................................................................................20第四章 整体电路分析................................................................................................................214.1 光发射电路..................................................................................................................214.2 光电转换电路..............................................................................................................214...
