目 录
摘 要 .................................................I
1 产生干扰的因素 ..........................................1
1.1 干扰的定义.......................................................................................................1
1.2 形成干扰的三个要素.......................................................................................1
1.3 干扰来源...........................................................................................................................2
2 干扰存在的形式 ..........................................3
2.1 串模信号...........................................................................................................3
2.2 共模信号...........................................................................................................3
3 抗干扰的措施 ............................................4
3.1 抗干扰方法.......................................................................................................4
3.2 屏蔽...................................................................................................................4
3.3 隔离...................................................................................................................5
3.3.1 光电隔离...........................................................................................................................5
3.3.2 变压器隔离.......................................................................................................................5
3.3.3 继电器隔离.......................................................................................................................6
4 系统接地 ...............................................7
4.1 一点接地...........................................................................................................7
4.2 多点接地...........................................................................................................8
5 软件抗干扰设计.....................................................................................9
5.1 滤波简介...........................................................................................................9
5.2 低通滤波器.......................................................................................................9
6 提高系统抗干扰的措施 ...................................11
6.1 逻辑设计力求简单可靠.................................................................................11
6.2 硬件自检测和软件自恢复的设计....................................................................................11
6.3 从安装和工艺等方面采取措施以消除干扰....................................................................11
6.3.1 合理选择接地.................................................................................................................11
6.3.2 合理选择电源.................................................................................................................12
6.3.3 合理布局.........................................................................................................................12
结 论 ................................................14
致 谢 ................................................15
参考文献 ................................................16
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