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    • 92. 发明授权
    • Method of reducing crosstalk induced noise in circuitry designs
    • 减少电路设计中串扰引起的噪声的方法
    • US07945881B2
    • 2011-05-17
    • US11961440
    • 2007-12-20
    • Sungjun ChunAnand HaridassJesus MontanezXiaomin Shen
    • Sungjun ChunAnand HaridassJesus MontanezXiaomin Shen
    • G06F17/50
    • G06F17/5036G06F17/5077
    • A method of reducing crosstalk induced noise in a physical circuit wiring design constructs a spatial vector for each interconnect wire segment in the physical circuit wiring design. The method compares the spatial vectors of said physical circuit wiring design and identifies any of the spatial vectors that are parallel to each other and have opposite directions. The method may identify all drivers and receivers in the physical circuit wiring design, and trace each interconnect line, starting with its driver, to determine a routed length from the driver to each segment break point of the interconnect line. The method may construct the spatial vector by defining an origin in the physical circuit wiring design. The method determines a starting point and an ending point of the spatial vector with respect to the origin. The starting point of the spatial vector is the break point of the interconnect wire segment closer to the driver. The ending point of the spatial vector is the break point of the interconnect wire segment farther from the driver. The method may define a Cartesian coordinate system with respect to the origin. The Cartesian coordinate system may be orthogonal with the interconnect wire segments of the physical circuit wiring design. The method may define one or more geometry windows in the physical circuit wiring design and compare the spatial vectors in each geometry window.
    • 在物理电路布线设计中减少串扰引起的噪声的方法在物理电路布线设计中为每个互连线段构造空间矢量。 该方法比较了所述物理电路布线设计的空间矢量,并且识别彼此平行且具有相反方向的任何空间矢量。 该方法可以识别物理电路布线设计中的所有驱动器和接收器,并且从其驱动器开始追踪每个互连线,以确定从驱动器到互连线的每个段断点的路由长度。 该方法可以通过在物理电路布线设计中定义原点来构造空间矢量。 该方法确定相对于原点的空间矢量的起始点和终点。 空间矢量的起始点是互连线段靠近驾驶员的断点。 空间矢量的终点是互连线段远离驾驶员的断点。 该方法可以相对于原点定义笛卡尔坐标系。 笛卡尔坐标系可以与物理电路布线设计的互连线段正交。 该方法可以在物理电路布线设计中定义一个或多个几何窗口并比较每个几何窗口中的空间矢量。
    • 97. 发明申请
    • METHOD FOR REDUCING CROSS-TALK INDUCED SOURCE SYNCHRONOUS BUS CLOCK JITTER
    • 用于减少交叉输入源同步总线时钟抖动的方法
    • US20080143375A1
    • 2008-06-19
    • US11611200
    • 2006-12-15
    • Bao G. TruongDaniel Mark DrepsAnand HaridassJohn C. SchiffJoel D. Ziegelbein
    • Bao G. TruongDaniel Mark DrepsAnand HaridassJohn C. SchiffJoel D. Ziegelbein
    • H03K19/00H03K19/003
    • H04L25/45
    • A first clock signal of frequency F is used to couple data to an off-chip driver (OCD) using a master/slave flip flop (FF), wherein the master latch is clocked with the first clock signal and the slave latch is clocked with the complement of the first clock signal. A second clock signal of frequency F/2 is generated from the first clock signal. The second clock signal is shifted a time equal to substantially one-half the cycle of the first clock signal. In one embodiment, the second clock is shifted using a delay line circuit. In another embodiment, the second clock is shifted using a master/slave FF, wherein the master latch is clocked with the complement of the first clock signal and the slave latch is clocked with the first clock signal. The logic state transitions of the data between edges of the propagating clock thereby reducing coupling to the clock transitions and thus reducing edge jitter.
    • 使用频率F的第一时钟信号用于使用主/从触发器(FF)将数据耦合到片外驱动器(OCD),其中主锁存器由第一时钟信号计时,从锁存器以 第一个时钟信号的补码。 从第一时钟信号产生频率为F / 2的第二时钟信号。 第二时钟信号被移位等于第一时钟信号的周期的大致一半的时间。 在一个实施例中,使用延迟线电路来移位第二时钟。 在另一个实施例中,使用主/从FF来移位第二时钟,其中主锁存器用第一时钟信号的补码进行计时,从锁存器用第一时钟信号计时。 传播时钟的边缘之间的数据的逻辑状态转换,从而减少与时钟转换的耦合,从而减少边缘抖动。
    • 98. 发明授权
    • System and method for automatic insertion of on-chip decoupling capacitors
    • 自动插入片上去耦电容的系统和方法
    • US07302664B2
    • 2007-11-27
    • US11054916
    • 2005-02-10
    • Anand HaridassAndreas HuberErich KlinkJochen Supper
    • Anand HaridassAndreas HuberErich KlinkJochen Supper
    • G06F17/50
    • G06F17/5045G06F2217/78
    • A system and method for automatic insertion of on-chip decoupling capacitors are provided. With the system and method, an integrated circuit design is partitioned into cells and the noise distribution per cell of an integrated circuit is determined. This noise distribution may be generated using any of a number of different known mechanisms and generally results in a noise-map being generated for the integrated circuit. Thereafter, a mapping function is applied to the noise map for each cell to determine a required capacitance for the cells of the integrated circuit. From this required capacitance per cell, the necessary decoupling capacitors may be identified as well as the location for insertion of these decoupling capacitors. In a similar manner, decoupling capacitors may be removed from cells of the integrated circuit based upon the determined required capacitance per cell.
    • 提供一种用于自动插入片上去耦电容器的系统和方法。 利用该系统和方法,将集成电路设计划分为单元,确定集成电路的每个单元的噪声分布。 该噪声分布可以使用多个不同的已知机构中的任何一个产生,并且通常导致为集成电路产生噪声映射。 此后,将映射函数应用于每个单元的噪声图,以确定集成电路的单元所需的电容。 根据每个电池所需的电容,可以识别必要的去耦电容以及插入这些去耦电容器的位置。 以类似的方式,可以基于每个单元所确定的所需电容从集成电路的单元去除去耦电容器。