| 摘要: |
| 介绍了潜通电路的概念和分析方法，指出冷机低阻通路是在工程实际中形成潜通电路
的典型原因以及冷备份电路和先后上电电路两种常见的潜通表现形式，提出了采用二极管、
三态门、集电极开路(OC)输出、光电隔离和选用开关电源等5种电路潜通隔离方法，并阐述
了各种方法的潜通隔离原理，可用于指导潜通电路的分析及其隔离防护电路的设计。 |
| 关键词: 电子系统 潜通电路分析 低阻通路 隔离 |
| DOI：10.3969/j.issn.1001-893X. |
|
| 基金项目: |
|
| Sneak Circuit Analysis(SCA) and Isolation Methods Under Power-off Low Impedance Path |
| YIN Shen-yan,LIU Min,LI Liang |
| (Southwest China Institute of Electronic Technology, Chengdu 610036, China) |
| Abstract: |
| This paper introduces the sneak circuit concept and analysis metho
d,points out that power-off low impedance path is the typical reason o
f forming sneak circuit in engineering practice while cold backup circuit and se
quential power-on circuit are the two ordinary failure forms of sneak circuit,
and presents five circuit design methods including using diodes, tri-sta
te gates, open collector(OC) output, optical coupler and switching DC-DC modules
for isolating sneak circuits and their working principles, which can be used to
direct sneak circuit analysis(SCA) and its isolation circuit design. |
| Key words: electronic system sneak circuit analysis(SCA) low impedance path isolation |
《电讯技术》编辑部 