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1.发明授权Printed circuit board having conductors which can be decoupled for isolating intactive integrated circuits connected thereto 失效印刷电路板具有能够被去耦的导体，用于隔离连接到其上的集成电路
公开(公告)号：US5910876A
公开(公告)日：1999-06-08
申请号：US97090
申请日：1998-06-12
CPC分类号： G06F13/4081 , H02J7/0031 , H02J9/061 , Y10T307/625 , Y10T307/729 , Y10T307/858
摘要： A printed circuit board includes an edge connector operable to be coupled to an expansion bus. An integrated circuit is mounted on the printed circuit board and is coupled to the edge connector. The integrated circuit is operable to snoop memory operations on the expansion bus and cause selected memory data to be stored in a memory on the printed circuit board. A first power conductor extends across a first portion of the printed circuit board and is coupled to the integrated circuit. A second power conductor extends across a second portion of the printed circuit board and is also coupled to the integrated circuit. The circuit board also includes a decoupling unit connected between the first power conductor and the second power conductor. The decoupling unit causes disconnect of the first power conductor from the second power conductor during times in which voltage within the first power conductor is less than voltage within the second power conductor.
摘要翻译： 印刷电路板包括可连接到扩展总线的边缘连接器。 集成电路安装在印刷电路板上并耦合到边缘连接器。 集成电路可操作以窥探扩展总线上的存储器操作，并使所选择的存储器数据存储在印刷电路板上的存储器中。 第一电源导体延伸穿过印刷电路板的第一部分并且耦合到集成电路。 第二电源导体延伸穿过印刷电路板的第二部分并且还耦合到集成电路。 电路板还包括连接在第一电力导体和第二电力导体之间的去耦单元。 在第一电力导体内的电压小于第二电力导体内的电压的时间期间，去耦单元导致第一电力导体与第二电力导体的断开。
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2.发明授权Printed circuit board having conductors which can be decoupled for isolating inactive integrated circuits connected thereto 失效具有导体的印刷电路板，其可以被去耦以隔离与其连接的不活动集成电路
公开(公告)号：US5796566A
公开(公告)日：1998-08-18
申请号：US695829
申请日：1996-08-16
CPC分类号： G06F13/4081 , H02J7/0031 , H02J9/061 , Y10T307/625 , Y10T307/729 , Y10T307/858
摘要： A communication system is presented whereby sequences of video screens sent from a host CPU to a video controller can be stored and subsequently retrieved by a terminal located remote from the host CPU. Detection logic, controller memory, processor and a communication unit are compiled as a system configured upon a PCB. The PCB is configured to maintain certain vital functions even if power supplied from an expansion bus ceases. The PCB may employ a battery which maintains processor and controller memory activities and communication therebetween for a period of time sufficient to sustain video screen information stored within the controller memory. Thus, decoupling circuitry is present which prevents drain upon the battery if the communication unit is not being used. The decoupling unit separates power and signal conductors between portions of the printed circuit board. A power status signal is indicative of the voltage level within power conductors of one portion relative to a voltage level within power conductors of another portion to effectuate decoupling therebetween.
摘要翻译： 提供了一种通信系统，其中从主机CPU发送到视频控制器的视频屏幕序列可以被存储并且随后由位于远离主机CPU的终端检索。 检测逻辑，控制器存储器，处理器和通信单元被编译为在PCB上配置的系统。 即使从扩展总线提供的电源停止，PCB被配置为保持某些重要功能。 PCB可以采用一种电池，其维持处理器和控制器存储器活动以及它们之间的通信，持续一段时间足以维持存储在控制器存储器内的视频屏幕信息。 因此，如果通信单元未被使用，则存在去耦电路，防止电池漏电。 去耦单元将电源和信号导体分隔在印刷电路板的部分之间。 电源状态信号指示一部分的电力导体内的电压电平相对于另一部分的电力导体内的电压电平以实现它们之间的去耦。
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