冷机低阻通路下的潜通电路分析及隔离方法

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.

Sneak Circuit Analysis(SCA)and Isolation Methods Under Power-off Low Impedance Path

This paper introduces the sneak circuit concept and analysis method,points out that power-off low impedance path is the typical reason of forming sneak circuit in engineering practice while cold backup circuit and sequential power-on circuit are the two ordinary failure forms of sneak circuit,and presents five circuit design methods including using diodes, tri-state 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.