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    • 1. 发明授权
    • Method and ring oscillator for evaluating dynamic circuits
    • 用于评估动态电路的方法和环形振荡器
    • US06538522B1
    • 2003-03-25
    • US09977423
    • 2001-10-15
    • Anthony Gus AipperspachTodd Alan ChristensenPeter Thomas FreiburgerDavid Michael FriendNghia Van Phan
    • Anthony Gus AipperspachTodd Alan ChristensenPeter Thomas FreiburgerDavid Michael FriendNghia Van Phan
    • H03B2700
    • H03K3/0315
    • Measurement methods and a ring oscillator circuit are provided for evaluating dynamic circuits. The ring oscillator circuit includes a one-shot pulse generator receiving a single transition input signal and producing a pulse output signal having a rising transition and falling transition. The dynamic circuit to be evaluated is coupled to an output of the one-shot pulse generator receiving the pulse output signal of the one-shot pulse generator and producing a delayed output pulse at an output. A divide-by-two circuit is coupled to the output of the dynamic circuit to be evaluated. An output signal of the divide-by-two circuit is fed back to the one-shot pulse generator, and the cycle is repeated, thus oscillating. A multiplexer is connected between output of the dynamic circuit to be evaluated and the divide-by-two circuit. The multiplexer receives the pulse output of the one-shot pulse generator and includes a select input for selecting the output of the dynamic circuit to be evaluated or the pulse output of the one-shot pulse generator. By inserting the evaluation circuit into a path that can be multiplexed in and out of the oscillator path, and by measuring the difference between the frequency with and without the evaluation circuit in the path, the performance of the evaluation circuit can be accurately determined.
    • 提供测量方法和环形振荡器电路用于评估动态电路。 环形振荡器电路包括接收单个转换输入信号的单触发脉冲发生器,并产生具有上升的转换和下降转换的脉冲输出信号。 要评估的动态电路耦合到接收单触发脉冲发生器的脉冲输出信号的单触发脉冲发生器的输出,并在输出端产生延迟的输出脉冲。 二分之一电路耦合到待评估的动态电路的输出。 二分之一电路的输出信号反馈给单触发脉冲发生器,重复循环,从而振荡。 多路复用器连接在待评估的动态电路的输出端与分频电路之间。 复用器接收单触发脉冲发生器的脉冲输出,并且包括用于选择要评估的动态电路的输出或单触发脉冲发生器的脉冲输出的选择输入。 通过将评估电路插入到可以复用在振荡器路径中的路径之外,并且通过测量路径中具有和不具有评估电路的频率之间的差异,可以准确地确定评估电路的性能。
    • 5. 发明授权
    • Method and apparatus for assembling array and datapath macros
    • 阵列和数据路径宏的组合方法和装置
    • US06247166B1
    • 2001-06-12
    • US09104621
    • 1998-06-25
    • Anthony Gus AipperspachPeter Thomas Freiburger
    • Anthony Gus AipperspachPeter Thomas Freiburger
    • G06F1750
    • G06F17/5068
    • A method, computer program product and apparatus for assembling array and datapath macros are provided for very large scale integrated (VLSI) semiconductor integrated circuits. User selections are received for a hierarchical macro to be created. The user selections include a command list of multiple leaf cell build commands. X and Y placer pointers are initialized. A next build command is obtained from the command list and a command type is identified. Responsive to identifying a next leaf cell build command in a leaf cell group, a user selected schematic or physical view is identified. A corresponding leaf cell view is read for the user selected schematic or physical view. X and Y sizes are obtained for the leaf cell view. Then the leaf cell is oriented and placed. Next X and Y placer pointers are calculated and the sequential steps are repeated until a last leaf cell build command in the leaf cell group is found. Then the sequential steps return to obtain a next build command from the command list. Connections to adjacent leaf cells are provided by abutting cells together. Port and pin connections from the periphery of the array of placed leaf cells are propagated to a next hierarchical level of the hierarchical macro being created.
    • 为大规模集成(VLSI)半导体集成电路提供了一种用于组装阵列和数据路径宏的计算机程序产品和设备。 接收到要创建的分层宏的用户选择。 用户选择包括多个叶单元构建命令的命令列表。 X和Y指针被初始化。 从命令列表中获取下一个构建命令,并识别命令类型。 响应于在叶单元组中识别下一个叶细胞构建命令,识别用户选择的示意图或物理视图。 为用户选择的原理图或物理视图读取相应的叶单元格视图。 获得叶单元格视图的X和Y尺寸。 然后叶细胞被定向和放置。 计算下一个X和Y填充指针,并重复顺序步骤,直到找到叶细胞组中的最后一个叶细胞构建命令。 然后,顺序步骤返回以从命令列表中获取下一个构建命令。 通过邻接的细胞在一起提供与相邻叶细胞的连接。 从放置的叶单元阵列的外围的端口和引脚连接被传播到正在创建的分层宏的下一层级。
    • 9. 发明授权
    • Global wire management apparatus and method for a multiple-port random
access memory
    • 用于多端口随机存取存储器的全局线路管理装置和方法
    • US5991224A
    • 1999-11-23
    • US84127
    • 1998-05-22
    • Anthony Gus AipperspachPeter Thomas FreiburgerPeder James Paulson
    • Anthony Gus AipperspachPeter Thomas FreiburgerPeder James Paulson
    • G11C8/14G11C8/16G11C8/00
    • G11C8/16G11C8/14
    • A global wire management apparatus and method for a multiple port random access memory (RAM) is disclosed. The RAM includes an array of stacked dual memory cell structures each including a common row/column decoder disposed between an upper memory cell and lower memory cell. The upper memory cell is situated adjacent upper transfer gate circuitry, and the lower memory cell is situated adjacent lower transfer gate circuitry. The decoder circuit is oriented vertically in the middle of the dual memory cell structure so that the true and complement decoder outputs may be fed upwards and downwards to the upper and lower transfer gate circuits. Wiring of the upper and lower transfer gate circuits may be effected completely at the local interconnect layer. Each of the write ports of the common decoder includes a NAND gate, an inverter, and a transfer gate for each of the upper and lower memory cells for controlling the transfer of data to the upper and lower memory cells. The disclosed global wiring management methodology provides an approach for reducing the number of global interconnect wires in a multiple port random access memory cell by sharing various wiring channels between memory cells. Such an approach allows a number of the memory cell global signal interconnects to be moved from the global wiring plane to the local wiring plane.
    • 公开了一种用于多端口随机存取存储器(RAM)的全局线管理装置和方法。 RAM包括堆叠的双存储器单元结构的阵列,每个阵列包括布置在上部存储器单元和下部存储器单元之间的公共行/列解码器。 上存储器单元位于上传输门电路附近,并且下存储器单元位于下传输门电路附近。 解码器电路在双存储单元结构的中间垂直取向,使得真和补码解码器输出可以向上和向下馈送到上传输门电路和下传输门电路。 上部和下部传输门电路的接线可以在局部互连层完全实现。 公共解码器的每个写入端口包括用于控制向上部和下部存储器单元传输数据的上部和下部存储器单元中的每一个的“与非”门,反相器和传输门。 所公开的全局布线管理方法提供了一种通过在存储器单元之间共享各种布线通道来减少多端口随机存取存储单元中的全局互连线数量的方法。 这种方法允许多个存储单元全局信号互连从全局布线平面移动到局部布线平面。
    • 10. 发明授权
    • Low power wordline decoder circuit with minimized hold time
    • 低功率字线解码电路,保持时间最短
    • US06172531B2
    • 2001-01-09
    • US09251089
    • 1999-02-16
    • Anthony Gus AipperspachPeter Thomas Freiburger
    • Anthony Gus AipperspachPeter Thomas Freiburger
    • H03K190948
    • G11C8/10G11C8/08H03K19/0963
    • A wordline decoder circuit and method of decoding a wordline input signal are provided. A first decoder receives multiple inputs to be evaluated. The first decoder includes a first precharge device for precharging a first node and a first discharge device to enable discharging the first node. A first clock signal enables the first discharge device. The first clock signal disables the precharge device. A clock delay circuit receives the first clock signal and generates a delayed clock signal. A second logic is coupled to the first decoder. The second logic provides a wordline output. The second logic wordline output is enabled responsive to the delayed clock signal and is disabled responsive to the first clock signal.
    • 提供了字线解码器电路和对字线输入信号进行解码的方法。 第一解码器接收要评估的多个输入。 第一解码器包括用于对第一节点进行预充电的第一预充电装置和用于使第一节点放电的第一放电装置。 第一时钟信号使能第一放电装置。 第一个时钟信号禁止预充电设备。 时钟延迟电路接收第一时钟信号并产生延迟的时钟信号。 第二逻辑耦合到第一解码器。 第二个逻辑提供字线输出。 第二逻辑字线输出响应于延迟的时钟信号被使能,并且响应于第一时钟信号被禁止。