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71. 发明授权

US4658333A Variable length backplane bus 失效
标题翻译：可变长度背板总线
公开(公告)号：US4658333A
公开(公告)日：1987-04-14
申请号：US796724
申请日：1985-11-08
申请人： Gary J. Grimes
发明人： Gary J. Grimes
IPC分类号： G06F3/00 , G06F13/26 , G06F13/37 , G06F13/40 , H05K1/14
CPC分类号： G06F13/409 , H05K1/14
摘要： Presently available printed wiring board backplanes used in switching systems and the like are wired at the time of manufacture to enable only a fixed number of groups of circuit boards to communicate with each other. This limitation prevents a backplane from having the capability of serving a varying number of groups of boards. The present invention enables a backplane to have the capability of serving a variable number of groups of boards. The number of groups that can be served by a given backplane need not be fixed when the backplane is designed and manufactured. Each backplane of the present invention comprises backplane bus conductors and board conductors. The boards are effectively a part of the bus. The use of a first type of board in a backplane connector continues the bus to the adjacent connector. The use of a second type of board terminates the bus and does not extend it beyond the connector into which the second type of board is inserted. This permits a group of boards comprising one board of the second type and one or more boards of the first type to communicate with each other. The invention also permits communication to continue within a group if a board of the first type is removed from its connector. The invention advantageously permits the backplane to be reconfigured in the field by merely rearranging the boards.
摘要翻译：目前用于开关系统等中的印刷电路板背板在制造时被布线，以使得只有固定数量的电路板组彼此通信。该限制防止背板具有服务于不同数量的板组的能力。本发明使得背板具有服务于可变数量的板组的能力。当背板设计和制造时，可以由给定背板提供的组数量不需要固定。本发明的每个背板包括背板总线导体和板导体。这些板子实际上是公共汽车的一部分。在背板连接器中使用第一种类型的板将总线连接到相邻的连接器。使用第二类型的电路板终止总线，并且不将其延伸超过插入第二类型的电路板的连接器。这允许包括第一类型的一个板和第一类型的一个或多个板的一组板彼此通信。如果第一类型的板从其连接器移除，则本发明还允许通信在组内继续。本发明有利地允许通过仅布置板来在现场重新配置背板。

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