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    • 3. 发明授权
    • Routability using multiplexer structures
    • 使用多路复用器结构的路由性
    • US08539400B2
    • 2013-09-17
    • US13248119
    • 2011-09-29
    • Charles J. AlpertVictor N. KravetsZhuo LiLouise H. TrevillyanYing Zhou
    • Charles J. AlpertVictor N. KravetsZhuo LiLouise H. TrevillyanYing Zhou
    • G06F17/50
    • G06F17/505
    • Mechanisms are provided for generating a logic design of an integrated circuit device. An initial logic design representation of the integrated circuit device is received and one or more areas of the initial logic design representation are identified where logic elements in the one or more areas can be replaced with one or more multiplexer tree structures. Logic elements in the one or more areas of the initial logic design representation are replaced with multiplexer tree structures to generate a modified logic design representation. The modified logic design representation is output to a physical synthesis system to generate a physical layout of the integrated circuit device based on the modified logic design representation.
    • 提供用于产生集成电路器件的逻辑设计的机构。 接收集成电路设备的初始逻辑设计表示,并且识别初始逻辑设计表示的一个或多个区域,其中一个或多个区域中的逻辑元件可被一个或多个多路复用器树结构替代。 初始逻辑设计表示的一个或多个区域中的逻辑元件被多路复用器树结构替代以生成修改的逻辑设计表示。 经修改的逻辑设计表示被输出到物理合成系统,以基于经修改的逻辑设计表示来生成集成电路器件的物理布局。
    • 4. 发明申请
    • Clock Optimization with Local Clock Buffer Control Optimization
    • 时钟优化与本地时钟缓冲区控制优化
    • US20120124539A1
    • 2012-05-17
    • US12947445
    • 2010-11-16
    • Charles J. AlpertZhuo LiGi-Joon NamDavid A. PapaChin Ngai SzeNatarajan Viswanathan
    • Charles J. AlpertZhuo LiGi-Joon NamDavid A. PapaChin Ngai SzeNatarajan Viswanathan
    • G06F17/50
    • G06F17/505G06F2217/62
    • A physical synthesis tool for dock optimization with local clock buffer control optimization is provided. The physical synthesis flow consists of delaying the exposure of clock routes until after the clock optimization placement stage. The physical synthesis tool clones first local clock buffers. Then, the physical synthesis tool runs timing analysis on the whole design to compute the impact of this necessarily disruptive step. After cloning local clock buffers, the physical synthesis tool adds an extra optimization step to target the control signals that drive the local clock buffers. This optimization step may includes latch cloning, timing-driven placement, buffer insertion, and repowering. The flow alleviates high-fanout nets and produces significantly better timing going into clock optimization placement. After placement, the physical synthesis tool fixes latches and local clock buffers in place, inserts clock routes, and repowers local clock buffers.
    • 提供了一种用于通过本地时钟缓冲器控制优化进行码头优化的物理综合工具。 物理合成流程包括延迟时钟路由的曝光,直到时钟优化放置阶段为止。 物理综合工具克隆了第一个本地时钟缓冲区。 然后,物理综合工具对整个设计运行时序分析,以计算这一必然破坏性步骤的影响。 在克隆本地时钟缓冲器之后,物理综合工具增加了一个额外的优化步骤来对驱动本地时钟缓冲器的控制信号进行目标。 该优化步骤可以包括锁存克隆,定时驱动放置,缓冲器插入和重新供电。 该流程减轻了高扇出网络,并显着提高了进入时钟优化布局的时间。 放置后,物理综合工具将锁存器和本地时钟缓冲器固定到位,插入时钟路由并释放本地时钟缓冲区。
    • 10. 发明授权
    • Clock optimization with local clock buffer control optimization
    • 时钟优化与本地时钟缓冲控制优化
    • US08667441B2
    • 2014-03-04
    • US12947445
    • 2010-11-16
    • Charles J. AlpertZhuo LiGi-Joon NamDavid A. PapaChin Ngai SzeNatarajan Viswanathan
    • Charles J. AlpertZhuo LiGi-Joon NamDavid A. PapaChin Ngai SzeNatarajan Viswanathan
    • G06F17/50G06F9/455
    • G06F17/505G06F2217/62
    • A physical synthesis tool for dock optimization with local clock buffer control optimization is provided. The physical synthesis flow consists of delaying the exposure of clock routes until after the clock optimization placement stage. The physical synthesis tool clones first local clock buffers. Then, the physical synthesis tool runs timing analysis on the whole design to compute the impact of this necessarily disruptive step. After cloning local clock buffers, the physical synthesis tool adds an extra optimization step to target the control signals that drive the local clock buffers. This optimization step may includes latch cloning, timing-driven placement, buffer insertion, and repowering. The flow alleviates high-fanout nets and produces significantly better timing going into clock optimization placement. After placement, the physical synthesis tool fixes latches and local clock buffers in place, inserts clock routes, and repowers local clock buffers.
    • 提供了一种用于通过本地时钟缓冲器控制优化进行码头优化的物理综合工具。 物理合成流程包括延迟时钟路由的曝光,直到时钟优化放置阶段为止。 物理综合工具克隆了第一个本地时钟缓冲区。 然后,物理综合工具对整个设计运行时序分析,以计算这一必然破坏性步骤的影响。 在克隆本地时钟缓冲器之后,物理综合工具增加了一个额外的优化步骤来对驱动本地时钟缓冲器的控制信号进行目标。 该优化步骤可以包括锁存克隆,定时驱动放置,缓冲器插入和重新供电。 该流程减轻了高扇出网络,并显着提高了进入时钟优化布局的时间。 放置后,物理综合工具将锁存器和本地时钟缓冲器固定到位,插入时钟路由并释放本地时钟缓冲区。