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    • 11. 发明授权
    • Match resolution circuit for an associative memory
    • 匹配分辨率电路用于关联存储器
    • US06748484B1
    • 2004-06-08
    • US09637131
    • 2000-08-10
    • Alex E. HendersonWalter E. CroftRaymond M. ChuVishal Sarin
    • Alex E. HendersonWalter E. CroftRaymond M. ChuVishal Sarin
    • G06F1200
    • G11C15/00G11C15/04
    • A system and method for determining a best match from a plurality of matches received in response to a search input for an associative memory includes a priority field associated with each data item stored in the associative memory. The priority field corresponds to criteria that is used to order the priority of the data items in the associative memory. A match resolution circuit is coupled to receive match signals from an associative memory, such as a CAM, and the priority fields of the matching data items. The match resolution structure compares the priority fields of the matching data items to determine which data item has the highest priority. The match resolution structure indicates the data item with the highest priority in the priority field as the best match of the associative memory for the particular search input.
    • 用于响应于关联存储器的搜索输入而接收的多个匹配来确定最佳匹配的系统和方法包括与存储在关联存储器中的每个数据项相关联的优先级字段。 优先级字段对应于用于对关联存储器中的数据项的优先级进行排序的标准。 匹配分辨率电路被耦合以从诸如CAM的关联存储器和匹配数据项的优先级字段接收匹配信号。 匹配分辨率结构比较匹配数据项的优先级字段以确定哪个数据项具有最高优先级。 匹配分辨率结构指示优先级字段中具有最高优先级的数据项作为特定搜索输入的关联存储器的最佳匹配。
    • 14. 发明授权
    • Apparatus for selecting a reference line for image data compression
    • 用于选择用于图像数据压缩的参考线的装置
    • US4837848A
    • 1989-06-06
    • US32102
    • 1987-03-27
    • Alex E. HendersonFrederick L. DrainLawrence G. Roberts
    • Alex E. HendersonFrederick L. DrainLawrence G. Roberts
    • H04N1/417
    • H04N1/4175
    • An apparatus for selecting a reference line for image data compression including a plurality of mutually connected reference selector chips for selecting a reference scan line from vertical mode coding of image data. The reference selector chips select a reference scan line from a plurality of preceding scan lines in exclusive or combination of the image data of each candidate reference scan line with the image data from the input scan line. The candidate reference scan line that has the lowest number of dissimilar bits is selected as the reference scan line. Each candidate reference scan line has associated therewith a register having bit positions arranged from the highest order bit position to a lowest order bit position for storing a binary sum of the number of dissimilar bits. When the sums are compared, the binary value and successive bit positions are compared from the highest order bit position to the lowest order bit position. When the binary value for a compared bit position of a register is greater than the binary value in the corresponding bit position of another register, each reference selector chip generates a losing signal for indicating that the register lost the arbitration. When the lowest order bit position of a register is not greater than the lowest order bit position of any other register and no losing signal was generated for the register, the associated chip generates a winning signal for indicating which candidate reference scan line had the least number of bits dissimilar to the corresponding bits in the input scan line. Each chip further includes a circuit for establishing a priority among the candidate reference scan lines so that two registers both having the smallest binary sum will not create a deadlock.
    • 17. 发明授权
    • Caching dynamically allocated objects
    • 缓存动态分配的对象
    • US06446188B1
    • 2002-09-03
    • US09654189
    • 2000-09-01
    • Alex E. HendersonWalter E. Croft
    • Alex E. HendersonWalter E. Croft
    • G06F1200
    • G06F12/1054G06F12/023G06F12/0292G06F12/0875G06F2212/45
    • A system for mapping a sparsely populated virtual space of variable sized memory objects to a more densely populated physical address space of fixed size memory elements for use by a host processor comprises an object cache for caching frequently accessed memory elements and an object manager for managing the memory objects used by the host processor. The object manager may further comprise an address translation table for translating virtual space addresses for memory objects received from the host processor to physical space addresses for memory elements, and a management table for storing data associated with the memory objects used by the host processor.
    • 用于将可变大小的存储器对象的稀疏填充的虚拟空间映射到用于由主处理器使用的固定大小的存储器元件的更加密集的物理地址空间的系统包括用于缓存经常访问的存储器元件的对象高速缓存和用于管理 主机处理器使用的内存对象。 对象管理器还可以包括用于将从主机处理器接收的存储器对象的虚拟空间地址转换为存储器元件的物理空间地址的地址转换表,以及用于存储与主处理器使用的存储器对象相关联的数据的管理表。
    • 18. 发明授权
    • Dual rail drive for distributed logic
    • 双轨驱动器用于分布式逻辑
    • US06426647B1
    • 2002-07-30
    • US09663865
    • 2000-09-15
    • Alex E. Henderson
    • Alex E. Henderson
    • G06F738
    • H03K19/0013
    • A logic circuit comprises a dual rail drive circuit having a first rail and a second rail. The logic circuit further comprises a logic block having a first input coupled to receive an input signal from the first rail of the dual rail driver, and a second input coupled to receive an input signal from the second rail of the dual rail driver. In one embodiment, the input signal from the first rail of the dual rail driver can swing to a voltage level sufficient to turn on a p-channel transistor, and the input signal from the second rail of the dual rail driver can swing to a voltage level sufficient to turn on an n-channel transistor. For example, for a 0.18 micron process the input signal from the first rail may have a voltage swing from VDD to VDD-400 MV, and the input signal from the second rail may a voltage swing from GROUND to 400 MV.
    • 逻辑电路包括具有第一导轨和第二导轨的双轨驱动电路。 逻辑电路还包括逻辑块,其具有被耦合以接收来自双轨驱动器的第一轨的输入信号的第一输入和耦合以从双轨驱动器的第二轨接收输入信号的第二输入。 在一个实施例中,来自双轨驱动器的第一导轨的输入信号可以摆动到足以导通p沟道晶体管的电压电平,并且来自双轨驱动器的第二导轨的输入信号可以摆动到电压 电平足以导通n沟道晶体管。 例如,对于0.18微米工艺,来自第一导轨的输入信号可以具有从VDD到VDD-400MV的电压摆幅,并且来自第二导轨的输入信号可以从地电压摆幅到400MV。