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    • 4. 发明授权
    • Method for synchronizing clocks upon reset
    • 复位时同步时钟的方法
    • US5510740A
    • 1996-04-23
    • US272879
    • 1994-07-11
    • Robert FarrellSharad Mehrotra
    • Robert FarrellSharad Mehrotra
    • H03K5/135H03K5/13
    • H03K5/135
    • A synchronized clocking circuit receives a clock signal and, in accordance with the received clock signal, provides a divided-down clock signal having a known phase relationship with respect to the received clock signal upon reset. In order to provide the known phase relationship, and therefore to synchronize the received clock signal and the divided-down clock signal, a cycle of the divided down clock signal is selectably skipped. A reset signal is conditioned and applied to an active going edge detector. The cycle of the divided down clock is selectably skipped according to the active going edge detector.
    • 同步时钟电路接收时钟信号,并且根据所接收的时钟信号,在复位时提供相对于所接收的时钟信号具有已知相位关系的分频时钟信号。 为了提供已知的相位关系,并且因此使接收到的时钟信号和分频时钟信号同步,可选地跳过分频下降时钟信号的周期。 复位信号被调节并应用于主动边沿检测器。 根据主动边沿检测器可选择地跳过分频下降时钟的周期。
    • 7. 发明申请
    • System and method for simplifying and manipulating k-partite graphs
    • 用于简化和操纵k-partite图的系统和方法
    • US20050038533A1
    • 2005-02-17
    • US10496778
    • 2002-04-05
    • Robert FarrellDouglas Gordin
    • Robert FarrellDouglas Gordin
    • G06F17/30G06F17/00
    • G06F17/30958G06Q50/01
    • The system has a collection of a plurality of objects. Each object defines a node in a k-partite graph, such that, the nodes can e divided into a number of mutually exclusive sets such that all of the nodes are in exactly one of the sets; further edges occur only between nodes in different sets; The system also has a simplification process that aggregates one or more of the nodes into one or more categories and identifies a category node corresponding to each category. The category node inherits the mode and the edges of all the nodes in the respective category. Further, the system contains Directed Acyclic Graphs Indices (DAGIs) whose nodes may have a 1-1 mapping with the nodes in the k-partite graph. These indices can be used to aggregate and hide nodes in the k-partite graph. Aggregation occurs by selecting one or more non-leaf nodes in the DAGI and aggregating all descendent nodes. Hiding occurs by selecting some set of DAGI nodes, thus selecting some corresponding set of nodes in the k-partite graph, and requesting this set of nodes be hidden which effectively removes them from further consideration until they are restored by explicit request.
    • 该系统具有多个对象的集合。 每个对象定义了k分图中的节点,使得节点可以被分成多个互斥集合,使得所有节点都在正好一组中; 另外的边缘仅发生在不同集合中的节点之间; 该系统还具有将一个或多个节点聚合成一个或多个类别并识别与每个类别对应的类别节点的简化过程。 类别节点继承相应类别中所有节点的模式和边。 此外,该系统包含定向非循环图指数(DAGI),其节点可以与k-部分图中的节点具有1-1映射。 这些索引可用于聚合和隐藏k-partite图中的节点。 通过在DAGI中选择一个或多个非叶节点并聚合所有后代节点来进行聚合。 通过选择一些DAGI节点进行隐藏,从而在k-partite图中选择一些对应的节点组,并且请求这组节点被隐藏,这有效地将它们从进一步的考虑中去除,直到它们被显式请求恢复。
    • 8. 发明授权
    • Page open/close scheme based on high order address bit and likelihood of
page access
    • 基于高位地址位的页面打开/关闭方案和页面访问的可能性
    • US5664153A
    • 1997-09-02
    • US521007
    • 1995-08-30
    • Robert Farrell
    • Robert Farrell
    • G06F12/02G06F12/00
    • G06F12/0215
    • When writing a computer program which accesses a page of memory a programmer may know whether the next memory access is likely to be in the same page of memory. According to a preferred embodiment, program instructions indicate whether the next access is likely to be in the same page of memory. When these instructions are assembled, the assembler puts page control information in an unused high order address bit of the memory access. When the program is executed a memory controller in the system executing the program reads this page control bit and determines whether to close the page after access or leave it open for the next access bit.
    • 当编写访问存储器页面的计算机程序时,程序员可以知道下一个存储器访问是否可能在同一页存储器中。 根据优选实施例,程序指令指示下一次访问是否可能在同一页的存储器中。 当组装这些指令时,汇编器将页面控制信息放置在存储器访问的未使用的高位地址位中。 当执行程序时,执行程序的系统中的存储器控​​制器读取该页面控制位,并确定是否在访问之后关闭页面或者将其打开以用于下一访问位。
    • 9. 发明授权
    • Reconfigurable interrupt device and method
    • 可重构中断设备和方法
    • US5519345A
    • 1996-05-21
    • US378920
    • 1995-01-26
    • Robert FarrellHimanshu SanghaviAshish Pandya
    • Robert FarrellHimanshu SanghaviAshish Pandya
    • H03K5/135H03K19/0175H03K19/20
    • H03K5/135
    • Reconfigurable interrupt circuitry may provide differing interrupt output signals to various interrupt receiving devices which are adapted to be driven by interrupt circuits having differing drive characteristics. Control signals representative of the device characteristics of the interrupt receiving device are applied to the reconfigurable interrupt circuitry and output characteristics of the reconfigurable interrupt circuitry are selected according to the control signals. In this manner the reconfigurable interrupt circuitry may by adapted to drive interrupt receiving devices which are compatible with active high interrupt output, active low interrupt output, open drain interrupt output, totem pole interrupt output, tristate interrupt output and non tristate interrupt output. The selected configuration of the reconfigurable interrupt circuitry is determined by writing to registers which may be placed within the memory space of external devices so that the external devices may configure the interrupt according to their own characteristics.
    • 可重配置中断电路可以向适合于由具有不同驱动特性的中断电路驱动的各种中断接收装置提供不同的中断输出信号。 代表中断接收装置的装置特性的控制信号被应用于可重构中断电路,并根据控制信号选择可重构中断电路的输出特性。 以这种方式,可重构中断电路可以适用于驱动与高电平有效中断输出,低电平有效中断输出,开漏中断输出,图腾柱中断输出,三态中断输出和非三态中断输出兼容的中断接收器件。 通过写入可以放置在外部设备的存储器空间内的寄存器来确定可重配置中断电路的所选配置,使得外部设备可以根据其自己的特性来配置中断。
    • 10. 发明申请
    • FOUR CORNER HIGH PERFORMANCE DEPTH TEST
    • 四角高性能深度测试
    • US20150178982A1
    • 2015-06-25
    • US14136290
    • 2013-12-20
    • Robert FarrellVasanth RanganathanKarol Carlo A Szerszen
    • Robert FarrellVasanth RanganathanKarol Carlo A Szerszen
    • G06T15/40
    • G06T15/405G06T2210/12
    • One or more apparatus and method for multi-pixel/sample level depth testing in a graphics processor is described. In embodiments, a bounding-box of variable size over which a depth test is to be performed is determined based on the pattern of lit pixels or samples within rasterizer tile. A multi-corner depth test may be performed between a source depth data plane and a destination depth plane within a source depth data bound where destination depth data is continuous within the source data bound. A range-based depth test may be performed in response to the destination data being discontinuous. Source depth data prevailing in the depth test may be stored in a compressed plane equation format in response to the source data being continuous within the source data bound, and may be stored as min/max depth data if discontinuous.
    • 描述了一种或多种用于图形处理器中的多像素/样本级深度测试的装置和方法。 在实施例中,基于在光栅化器瓦片内的点亮像素或样本的图案来确定将要执行深度测试的可变大小的边界框。 可以在源深度数据边界内的源深度数据平面和目的地深度平面之间执行多角度深度测试,其中目的地深度数据在源数据界限内是连续的。 可以响应于不连续的目的地数据来执行基于范围的深度测试。 在深度测试中存在的源深度数据可以以压缩平面方程式格式存储,以响应于源数据界限内的源数据是连续的,并且如果不连续,则可以将其存储为最小/最大深度数据。