数字电子系统抗干扰分析与设计

分析了电磁干扰源的基本理论,从硬件和软件两方面分析抗干扰措施.硬件方面从器件使用中抗干扰措施、电路设计抗干扰措施入手,重点分析了电路设计中抗干扰措施的三方面,并对其进行适当的展开分析.软件方面阐述了数字滤波方法、输入信号重复检测方法、输出端口数据刷新方法、软件拦截技术及“看门狗”技术.

Analysis and Design of Anti-interference in Digital Electronic Systems

The paper first analyzes, mainly from commonly used anti-interference measures for digital circuits design and taking conducted interference and radiated interference for examples, emphasizes the specific measures against the conducted and radiated interference. Then the paper analyzes the anti-interference measures in the aspects of hardware and software. In hardware, the measures when using devices, the measures in circuit design, and the printed board circuit anti-interference measures. Among the three, the paper lays emphasis on the anti-interference measures in circuit design. In software, the paper analyzes five aspects： digital filtering methods, input signal redetection methods, output port data refreshing methods, software interception technique and ＂ watching-dog＂ technique.