2.3 电光信息转换原理············································································ 12 2.3.1 半导体光源的物理基础······························································· 12 2.3.2 发光二极管的原理······································································· 14 2.4 光电探测原理···················································································· 14 2.4.1 光探测器性能参数······································································· 15 2.4.2 光探测器方式·············································································· 17 2.4.3 两种探测方式性能分析······························································· 19 2.4.4 光电探测的物理效应··································································· 22 2.5 本章小结·························································································· 29 第3 章光电式传感器的设计······································································ 30 3.1 引言··································································································· 30 目录 V 3.2 光源的设计························································································ 30 3.2.1 矩形脉冲波信号产生电路设计···················································· 30 3.2.2 光源放大电路的设计··································································· 31 3.2.3 白光二极管的选择······································································· 32 3.2.4 工作电源的选择··········································································· 33 3.3 光探测器的选择················································································ 34 3.3.1 光电池工作原理··········································································· 34 3.3.2 硅光电池的主要特性··································································· 35 3.3.3 光电池的线性输出电路······························································· 37 3.4 低通滤波器的设计············································································ 38 3.4.1 滤波器概述·················································································· 38 |
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