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    • 4. 发明授权
    • Fracturable lookup table and logic element
    • 可破坏的查找表和逻辑元素
    • US07800401B1
    • 2010-09-21
    • US11841727
    • 2007-08-20
    • David LewisBruce PedersenSinan KaptanogluAndy Lee
    • David LewisBruce PedersenSinan KaptanogluAndy Lee
    • H03K19/177
    • H03K19/177
    • A logic element includes memory elements, multiplexers, and controls. The multiplexers are arranged in levels including a highest level of multiplexers with inputs connected to the memory elements and outputs connected to inputs of a next-to-highest level of multiplexers and a first level of multiplexers with inputs connected to outputs of a second level of multiplexers and at least one output. The controls are connected to the multiplexers. In a first operational mode the controls determine a first-mode output at the at least one output of the first level of multiplexers, and in a second operational mode the controls determine a plurality of second-mode outputs at selected outputs of multiplexers not at the first level of multiplexers.
    • 逻辑元件包括存储器元件,多路复用器和控制器。 多路复用器被布置在包括最高级别的多路复用器的级别中,其中连接到存储器元件的输入端和连接到下一级到最高级复用器的输出的输出端和第一级多路复用器,其输入端连接到第二级 多路复用器和至少一个输出。 控制器连接到多路复用器。 在第一操作模式中,所述控制确定所述第一级多路复用器的所述至少一个输出处的第一模式输出,并且在第二操作模式中,所述控制确定多路复用器的选定输出处的多个第二模式输出, 第一级多路复用器。
    • 5. 发明授权
    • Super duplicate register removal
    • 超级重复注册删除
    • US07757189B1
    • 2010-07-13
    • US11489013
    • 2006-07-18
    • Bruce PedersenGreg William Baeckler
    • Bruce PedersenGreg William Baeckler
    • G06F17/50
    • G06F17/505
    • Redundant elements of digital designs, including digital designs with registered feedback, are identified and removed. The nodes of a design are assigned initial labels. The design is analyzed by selecting nodes associated with each label and identifying any equivalent nodes or complementary nodes to the selected node. Nodes are equivalent if they perform the same or complementary functions on input nodes assigned to the same labels. The selected node and its equivalent node, if any, are reassigned to the same label. Two or more complementary nodes are modified so that they have the same output. This analysis is repeated until all of the labels and associated nodes have been analyzed and there are no labels and associated nodes in need of further analysis. Following this analysis, equivalent nodes in the digital design will share the same label and all but one node with each label can be removed.
    • 数字设计的冗余元素,包括具有注册反馈的数字设计,被识别和删除。 设计的节点被分配初始标签。 通过选择与每个标签相关联的节点并且将所选节点的任何等效节点或互补节点识别来分析设计。 如果节点在分配给相同标签的输入节点上执行相同或互补的功能,则节点是相同的。 所选节点及其等效节点(如果有的话)被重新分配给相同的标签。 修改两个或多个互补节点,使其具有相同的输出。 重复此分析,直到所有标签和相关节点都被分析,并且没有标签和相关节点需要进一步分析。 经过分析,数字设计中的等效节点将共享相同的标签,除了一个节点之外,每个标签都可以被删除。
    • 7. 发明授权
    • Organizations of logic modules in programmable logic devices
    • 可编程逻辑器件中逻辑模块的组织
    • US07368944B1
    • 2008-05-06
    • US11649748
    • 2007-01-03
    • Michael D. HuttonBruce PedersenSinan KaptanogluDavid LewisTim Vanderhoek
    • Michael D. HuttonBruce PedersenSinan KaptanogluDavid LewisTim Vanderhoek
    • H03K19/177
    • H03K19/17736H03K19/17728
    • A programmable logic element grouping for use in multiple instances on a programmable logic device includes more than the traditional number of logic elements sharing secondary signal (e.g., clock, clock enable, clear, etc.) selection circuitry. The logic elements in such a grouping are divided into at least two subgroups. Programmable interconnection circuitry is provided for selectively applying signals from outside the grouping and signals fed back from the logic elements in the grouping to primary inputs of the logic elements in the grouping. The programmable interconnection circuitry limits possible application of at least some of these signals to one or the other of the subgroups, and/or provides for possible application of at least some of these signals to a greater percentage of the primary inputs to one of the subgroups than to the other.
    • 在可编程逻辑器件上的多个实例中使用的可编程逻辑元件组合包括多于共享次级信号(例如,时钟,时钟使能,清零等)选择电路的传统数量的逻辑元件。 这种分组中的逻辑元素被划分为至少两个子组。 提供了可编程互连电路,用于选择性地将分组外的信号和分组中的逻辑元件反馈的信号分组中的逻辑元件的主要输入。 可编程互连电路将这些信号中的至少一些信号的可能应用限制到子组中的一个或另一个,并且/或提供这些信号中的至少一些信号到其中一个子组的较大百分比的主要输入的可能应用 比对方。
    • 10. 发明授权
    • Fracturable lookup table and logic element
    • 可破坏的查找表和逻辑元素
    • US07323902B2
    • 2008-01-29
    • US11189549
    • 2005-07-25
    • David LewisBruce PedersenSinan KaptanogluAndy L. Lee
    • David LewisBruce PedersenSinan KaptanogluAndy L. Lee
    • G06F7/38H03K19/177
    • H03K19/17728H03K19/1737
    • A logic element includes memory elements, multiplexers, and controls. The multiplexers are arranged in levels including a highest level of multiplexers with inputs connected to the memory elements and outputs connected to inputs of a next-to-highest level of multiplexers and a first level of multiplexers with inputs connected to outputs of a second level of multiplexers and at least one output. The controls are connected to the multiplexers. In a first operational mode the controls determine a first-mode output at the at least one output of the first level of multiplexers, and in a second operational mode the controls determine a plurality of second-mode outputs at selected outputs of multiplexers not at the first level of multiplexers.
    • 逻辑元件包括存储器元件,多路复用器和控制器。 多路复用器被布置在包括最高级别的多路复用器的级别中,其中连接到存储器元件的输入端和连接到下一级到最高级复用器的输入端的输出端和第一级多路复用器,其输入端连接到第二级 多路复用器和至少一个输出。 控制器连接到多路复用器。 在第一操作模式中,所述控制确定所述第一级多路复用器的所述至少一个输出处的第一模式输出,并且在第二操作模式中,所述控制确定多路复用器的选定输出处的多个第二模式输出, 第一级多路复用器。