总线拓扑结构则是由唯一一根长电缆组成，计算机沿着电缆排布。
A bus consists of a single, long cable that computers connect to along its run.
令牌总线使用了物理总线拓扑结构，但同时也有一个令牌传递方案，用来判决每台计算机对总线的访问权限。
Token bus USES a physical bus topology, but also USES a token-passing scheme to arbitrate access to the bus.
讨论了三种常见的CMOS集成电路电源总线esd保护结构，分析了其电路结构、工作原理和存在的问题，进而提出了一种改进的ESD保护电源总线拓扑结构。
Three common power bus ESD protection structures in CMOS IC were discussed, the circuit structure and working theories were analyzed, an improved power bus ESD protection structure was put forward.
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