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    • 3. 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。
    • 4. 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。
    • 10. 发明申请
    • DELAY MECHANISM FOR UNBALANCED READ/WRITE PATHS IN DOMINO SRAM ARRAYS
    • 多米诺SRAM阵列中不平衡读/写缓存的延迟机制
    • US20080117695A1
    • 2008-05-22
    • US11560428
    • 2006-11-16
    • Chad Allen AdamsAnthony Gus AipperspachDerick Gardner BehrendsGeorge Francis Paulik
    • Chad Allen AdamsAnthony Gus AipperspachDerick Gardner BehrendsGeorge Francis Paulik
    • G11C7/00G11C8/10
    • G11C8/10
    • A memory system, e.g., a domino static random access memory (SRAM), includes a plurality of memory cells and a wordline decoder coupled to the memory cells through wordlines. The wordline decoder provides a wordline signal to one or more memory cells over the wordlines to allow access to the memory cell(s) for a read operation or a write operation. Read_wl and write_wl signals are generated by the wordline decoder based on whether a read or a write operation is to be performed in the next cycle. The wordline decoder includes a buffer having an input for receiving the write_wl signal and an output for outputting a delayed version of the write_wl signal. The wordline signal is activated by the wordline decoder based on the read_wl signal and the delayed write_wl signal. This overcomes the “early read” problem in which write performance is degraded due to a fast read path.
    • 存储器系统,例如多米诺骨牌静态随机存取存储器(SRAM),包括多个存储器单元和通过字线耦合到存储器单元的字线解码器。 字线解码器通过字线向一个或多个存储器单元提供字线信号,以允许访问存储器单元用于读取操作或写入操作。 Read_wl和write_wl信号由字线解码器基于在下一周期中是执行读操作还是写操作生成。 字线解码器包括具有用于接收write_wl信号的输入的缓冲器和用于输出write_wl信号的延迟版本的输出。 基于read_wl信号和延迟的write_wl信号,字线信号由字线解码器激活。 这克服了由于快速读取路径而导致写入性能下降的“早期读取”问题。