公开(公告)号：US06177808B1

公开(公告)日：2001-01-23

申请号：US09070937

申请日：1998-04-30

申请人： David F. Heinrich ,  Saimak Tavallaei ,  Barry S. Basile

发明人： David F. Heinrich ,  Saimak Tavallaei ,  Barry S. Basile

IPC分类号： H03K19003

CPC分类号： H03K17/693

摘要： In electronic systems, signaling problems frequently occur when a device is driving a signal on a line to an incorrect level at a particular point in time. When production schedules do not permit fixing the defects in the errant device, programmable logic has been employed to work around the problems caused by the defective device. Higher device speeds and increasingly complex bus protocols have made the technique of singly using programmable logic, more difficult to implement. The addition of bidirectional switches integrated with and controlled by programmable logic in a monolithic integrated circuit allows the programmable logic device to respond more quickly while at the same time consuming less printed circuit board space. Additionally, the invention provides for termination of the isolated device and/or signal line stubs.

摘要翻译： 在电子系统中，当设备在特定时间点将线上的信号驱动到不正确的电平时，经常发生信令问题。 当生产计划不允许修复错误设备中的缺陷时，可以使用可编程逻辑来解决由缺陷设备引起的问题。 更高的设备速度和越来越复杂的总线协议使单独使用可编程逻辑的技术更难实现。 在单片集成电路中添加与可编程逻辑集成并由其控制的双向开关允许可编程逻辑器件更快地响应，同时消耗更少的印刷电路板空间。 另外，本发明提供了隔离设备和/或信号线存根的终止。

公开(公告)号：US5943482A

公开(公告)日：1999-08-24

申请号：US658602

申请日：1996-06-05

申请人： Paul R. Culley ,  Alan L. Goodrum ,  Raymond Y.L. Chow ,  Barry S. Basile

发明人： Paul R. Culley ,  Alan L. Goodrum ,  Raymond Y.L. Chow ,  Barry S. Basile

IPC分类号： G06F1/26 ,  G06F1/18 ,  G06F12/08 ,  G06F13/36 ,  G06F13/40 ,  G06F13/00

CPC分类号： G06F13/4081

摘要： A computer system has a bus, a connector for a circuit card, and a clamp configured to selectively prevent removal of the circuit card from the connector when the clamp is engaged. The computer system has circuitry connected to monitor the engagement status of the clamp and to regulate delivery of power to the connector based on the engagement state of the clamp.

摘要翻译： 计算机系统具有总线，用于电路卡的连接器和配置成当夹具接合时选择性地防止从连接器移除电路卡的夹具。 计算机系统具有连接的电路，用于监视夹具的接合状态，并根据夹具的接合状态调节对连接器的电力输送。

公开(公告)号：US5712754A

公开(公告)日：1998-01-27

申请号：US631963

申请日：1996-04-15

申请人： Chi Kim Sides ,  Philip James McKenzie ,  Barry S. Basile

发明人： Chi Kim Sides ,  Philip James McKenzie ,  Barry S. Basile

IPC分类号： G06F1/26 ,  G06F1/30 ,  G06F3/00 ,  G06F13/40 ,  H02H9/00

CPC分类号： G06F13/4081 ,  H02H9/004

摘要： A protection circuit for a computer system having PCI expansion cards and PCI expansion slots with multiple power rails for supplying power to the PCI expansion cards, the protection circuit including a current monitor that monitors the current levels drawn by the PCI expansion card at each power rail; an inrush current controller for controlling the initial current applied to each of the power rails when an expansion card is initially inserted into an expansion slot; a voltage monitor that monitors the voltage levels applied to selected power rails; and a disconnector for disconnecting the power to the PCI expansion slot when either the current level drawn by the PCI expansion card at any of the power rails goes beyond a selected range or when the voltage levels at any of the selected monitored power rails are below a selected threshold or when commanded by the computer system.

摘要翻译： 一种用于具有PCI扩展卡和具有用于向PCI扩展卡供电的多个电源轨的PCI扩展槽的计算机系统的保护电路，该保护电路包括监视由PCI扩展卡在每个电源轨上绘制的当前电平的电流监视器 ; 浪涌电流控制器，用于当扩展卡最初插入到扩展槽中时，控制施加到每个电源轨的初始电流; 一个电压监视器，用于监视施加到所选电源轨的电压电平; 以及用于当PCI扩展卡在任何电源轨下拉出的电流水平超过所选范围时，或者当任何被选择的监视电力轨的电​​压水平低于一个时，断开与PCI扩展槽的电力的隔离开关 选择的阈值或当由计算机系统命令时。

公开(公告)号：US5611045A

公开(公告)日：1997-03-11

申请号：US145339

申请日：1993-10-29

申请人： Barry S. Basile

发明人： Barry S. Basile

IPC分类号： G06F13/40 ,  G06F13/42 ,  G06F11/34

CPC分类号： G06F13/4217 ,  G06F13/4068

摘要： A computer system determines the presence of a device attached to a system bus that responds to I/O or memory reads by driving the data lines of that bus to values normally present on an undriven bus. The data bus is first driven to a value other than its undriven value, such as to 00h. Then, circuitry measures the time it takes on an I/O or memory read for the data bus to return to its normally undriven value. If the response time is less than the time it takes for an undriven data bus to return to its undriven state, then an expansion board is driving the data bus to its normally undriven value. This indicates that the expansion board is responding to an I/O or memory read on the data bus, even though it is responding by driving that bus to its normally undriven value. Further, by determining the maximum response time of a device, system performance is then improved by tuning cycle time to correspond to that maximum response time.

摘要翻译： 计算机系统通过将该总线的数据线驱动到通常存在于未驱动总线上的值来确定连接到系统总线上的设备的响应I / O或存储器读取的存在。 数据总线首先被驱动到除了其未驱动值之外的值，例如为00h。 然后，电路测量数据总线上的I / O或存储器读取所需的时间，以恢复其正常未分配的值。 如果响应时间小于未驱动数据总线返回到其未驱动状态所需的时间，则扩展板将数据总线驱动到其正常未定义的值。 这表明扩展板正在对数据总线上的I / O或存储器进行响应，即使通过将该总线驱动到其正常未被驱动的值来响应。 此外，通过确定设备的最大响应时间，然后通过调整周期时间来改善系统性能以对应于该最大响应时间。