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26 条记录 (耗时 0.036 秒)

    Method of performing latch up check on an integrated circuit design
    1.
    发明授权
    Method of performing latch up check on an integrated circuit design 失效
    对集成电路设计执行锁存检查的方法

    公开(公告)号：US07275226B2

    公开(公告)日：2007-09-25

    申请号：US10709205

    申请日：2004-04-21

    申请人： Henry A. Bonges, III ,  David C. Reynolds ,  James E. Sundquist

    发明人： Henry A. Bonges, III ,  David C. Reynolds ,  James E. Sundquist

    IPC分类号： G06F9/45 ,  G03F1/00 ,  G03F9/00 ,  G03C5/00

    CPC分类号： G06F17/5081

    摘要： A method of performing latch up check on an integrated circuit (IC) design that comprises rasterizing a conductor region shape and contact shapes and iteratively expanding the contact shapes within the conductor region shape using a cellular algorithm. Direction values for contact cells can be used to limit the number of neighboring cells which must be explored. In every fourth iteration of the expansion process, corner cells may not be expanded. Reachable areas outside of conductors can also be explored.

    摘要翻译： 一种对集成电路（IC）设计进行闩锁检查的方法，其包括使用蜂窝算法对导体区域形状进行光栅化并且接触形状并且迭代地扩展导体区域形状内的接触形状。 接触细胞的方向值可用于限制必须探索的相邻细胞的数量。 在扩展过程的第四次迭代中，角细胞可能不会扩展。 还可以探索导体之外的可达到的区域。

    Electron beam accelerator and ceramic stage with electrically-conductive layer or coating therefor
    2.
    发明授权
    Electron beam accelerator and ceramic stage with electrically-conductive layer or coating therefor 失效
    电子束加速器和具有导电层或涂层的陶瓷台

    公开(公告)号：US07336764B2

    公开(公告)日：2008-02-26

    申请号：US11254390

    申请日：2005-10-20

    申请人： David C. Reynolds

    发明人： David C. Reynolds

    IPC分类号： G01N23/083 ,  H05G2/00 ,  H05H9/00

    CPC分类号： H05H7/00

    摘要： A ceramic electron beam accelerator is disclosed finding particularly efficacious uses in X-ray electronic circuit imaging and testing applications. The ceramic stage design eliminates the need for placing metal reinforcements between adjoining stages of the accelerator, thereby increasing the accelerator's mechanical robustness and reliability, while also reducing manufacturing costs.

    摘要翻译： 公开了一种陶瓷电子束加速器，其在X射线电子电路成像和测试应用中发现特别有效的用途。 陶瓷台设计消除了在加速器的相邻阶段之间放置金属增强件的需要，从而增加了加速器的机械坚固性和可靠性，同时也降低了制造成本。

    Optical fluid level encoder
    3.
    发明申请
    Optical fluid level encoder 失效
    光学液位编码器

    公开(公告)号：US20080023659A1

    公开(公告)日：2008-01-31

    申请号：US11493197

    申请日：2006-07-26

    申请人： Paul H. Dietz ,  William S. Yerazunis ,  David C. Reynolds ,  Jonathan Westhues ,  Darren L. Leigh ,  Dirk Brinkman

    发明人： Paul H. Dietz ,  William S. Yerazunis ,  David C. Reynolds ,  Jonathan Westhues ,  Darren L. Leigh ,  Dirk Brinkman

    IPC分类号： G01N21/85

    CPC分类号： G01F23/2927

    摘要： An apparatus measures a fluid level in a container. A light source emits a light beam. A light sensor can sense the light beam. An optical conduit is arranged in a container for holding fluid. The optical conduit is arranged between the light source and the light sensor along a path of the light beam, such that at least one part of the light beam passes through the optical conduit, and at least an other part of the light beam passes through the fluid when the container holds the fluid. The sensor senses the light beam when a level of the fluid coincides with the one part of the light beam passing through the optical conduit, and the sensor does not sense the light beam when the level of the fluid coincides with the other part of the light beam passing through the fluid due to internal reflection at the fluid level.

    摘要翻译： 装置测量容器中的液面。 光源发射光束。 光传感器可以感测光束。 光导管布置在用于保持流体的容器中。 光导管沿着光束的路径布置在光源和光传感器之间，使得光束的至少一部分通过光导管，并且光束的至少另一部分通过 当容器保持流体时流体。 当流体的水平与通过光导管的光束的一部分重合时，传感器感测光束，并且当流体的水平与光的另一部分重合时，传感器不感测光束 由于流体水平处的内部反射，光束通过流体。

    AUTOMATIC VERIFICATION OF ADEQUATE CONDUCTIVE RETURN-CURRENT PATHS
    5.
    发明申请
    AUTOMATIC VERIFICATION OF ADEQUATE CONDUCTIVE RETURN-CURRENT PATHS 有权
    自动验证适当的导通回路电流

    公开(公告)号：US20090138836A1

    公开(公告)日：2009-05-28

    申请号：US11945754

    申请日：2007-11-27

    申请人： Timothy W. Budell ,  David C. Reynolds ,  Eric W. Tremble

    发明人： Timothy W. Budell ,  David C. Reynolds ,  Eric W. Tremble

    IPC分类号： G06F17/50

    CPC分类号： G06F17/5081

    摘要： After finding the shortest conductive signal return-current path for each signal, the invention assesses whether each conductive return-current path is adequate. The method analyzes each shortest conductive signal return-current path and determines if a significant portion of the signal return current flows as displacement current rather than following the conductive current path. A significant displacement current flows when the length of the conductive return-current path that diverges from a signal net is more than a previously defined limit based on the signal transition time. Further, a significant displacement current flows when the overall length of the signal differs from the overall length of the conductive return-current path by more than a previously defined limit based on the signal transition time.

    摘要翻译： 在找到每个信号的最短导通信号返回电流路径之后，本发明评估每个导通回路路径是否足够。 该方法分析每个最短导通信号返回电流路径，并确定信号返回电流的有效部分是否以位移电流流动，而不是跟随导电电流路径。 当从信号网发散的导电返回电流路径的长度大于基于信号转换时间的先前定义的极限时，显着的位移电流流动。 此外，当信号的总长度与导电返回电流路径的总长度不同于基于信号转换时间的预先限定的极限时，显着的位移电流流动。

    MOS current source layout technique to minimize deviation
    6.
    发明授权
    MOS current source layout technique to minimize deviation 失效
    MOS电流源布局技术，尽量减少偏差

    公开(公告)号：US5568145A

    公开(公告)日：1996-10-22

    申请号：US325483

    申请日：1994-10-19

    申请人： David C. Reynolds

    发明人： David C. Reynolds

    IPC分类号： H03M1/06 ,  H03M1/68 ,  H03M1/74

    CPC分类号： H03M1/0648 ,  H03M1/685 ,  H03M1/747

    摘要： A current source DAC is provided including a plurality of current source cells arranged in an array of a plurality of columns and rows. Among the plurality of current source cells is a plurality of least significant bit cells, wherein each least significant bit cell includes at least one current source cell. The plurality of least significant bit cells includes current source cells from among a centrally located column of the array. Also among the plurality of current source cells is a plurality of most significant bit cells. Each most significant bit cell includes a plurality of current source cells electrically added together and physically located along a diagonal path across the columns and rows of the array. The current source cell include CMOS transistors. The physical layout and electrical connection scheme reduces DNL errors due to transistor process gradients.

    摘要翻译： 提供电流源DAC，其包括以多个列和行的阵列布置的多个电流源单元。 多个当前源单元中的多个最低有效位单元，其中每个最低有效位单元包括至少一个电流源单元。 多个最低有效位单元包括来自阵列的位于中心的列中的当前源单元。 多个当前源单元之中也是多个最高有效位单元。 每个最高有效位单元包括多个电流源单元，电流相加在一起，并且沿着跨阵列的列和行的对角路径物理地定位。 电流源单元包括CMOS晶体管。 物理布局和电气连接方案减少了晶体管工艺梯度引起的DNL误差。

    CRT cursor control system
    7.
    发明授权
    CRT cursor control system 失效
    CRT光标控制系统

    公开(公告)号：US5541620A

    公开(公告)日：1996-07-30

    申请号：US413188

    申请日：1995-03-30

    申请人： David C. Reynolds

    发明人： David C. Reynolds

    IPC分类号： G09G5/08

    CPC分类号： G09G5/08

    摘要： A cursor control system where the starting x-axis pixel position of the cursor pattern is determined by decoding the last two bits of the preloaded x-axis address (as determined by a manual control manipulated by the operator). This decoded data produces a signal for controlling the transmission gate multiplexer so as to determine the position where the cursor data stream is inserted into the video data stream.

    摘要翻译： 光标控制系统，其中通过解码预加载的x轴地址的最后两位（由操作者操纵的手动控制确定）来确定光标图案的起始x轴像素位置。 该解码数据产生用于控制传输门多路复用器的信号，以便确定光标数据流插入到视频数据流中的位置。

    Signal-controlled ring oscillator with delay cells having constant gain with change in frequency
    8.
    发明授权
    Signal-controlled ring oscillator with delay cells having constant gain with change in frequency 失效
    具有延迟单元的信号控制环形振荡器具有恒定的增益，频率变化

    公开(公告)号：US5285173A

    公开(公告)日：1994-02-08

    申请号：US912550

    申请日：1992-07-13

    申请人： David C. Reynolds

    发明人： David C. Reynolds

    IPC分类号： H03K3/0231 ,  H03B5/00 ,  H03K3/354

    CPC分类号： H03K3/0231

    摘要： A ring-type oscillator with a plurality of delay cells including differential pairs of MOS transistors. Current sources supply current to each pair, and the magnitude of the current supplied is variable by a control voltage to alter the delay of the MOS devices, thereby to alter the frequency of oscillation. Each delay cell MOS device is connected in series with another MOS device biased into its linear region to act as a load resistance. This load is variable by the control voltage so as to tend to maintain the gain of the delay cells constant with changes in frequency of oscillation.

    摘要翻译： 一种具有多个延迟单元的环形振荡器，包括MOS晶体管的差分对。 电流源为每对提供电流，并且通过控制电压可变电流的大小可改变MOS器件的延迟，从而改变振荡频率。 每个延迟单元MOS器件与被偏置到其线性区域中的另一MOS器件串联连接以用作负载电阻。 该负载可通过控制电压变化，从而随着振荡频率的变化趋向于保持延迟单元的增益恒定。

    Hand held high power pulsed precision x-ray source
    9.
    发明授权
    Hand held high power pulsed precision x-ray source 失效
    手持式高功率脉冲精密X射线源

    公开(公告)号：US5077771A

    公开(公告)日：1991-12-31

    申请号：US317456

    申请日：1989-03-01

    申请人： Brian Skillicorn ,  David C. Reynolds ,  Richard S. Burrow

    发明人： Brian Skillicorn ,  David C. Reynolds ,  Richard S. Burrow

    IPC分类号： H01J35/16 ,  H05G1/06 ,  H05G1/32 ,  H05G1/34

    CPC分类号： H05G1/06 ,  H01J35/16 ,  H05G1/32 ,  H05G1/34

    摘要： A pulsed precision x-ray source includes a miniaturized internally self-shielding x-ray tube and an integral generator contained in a hand-held housing for generating timed bursts of x-ray having regulated energy level. A control grid and focus electrode within the tube enable precise on-off control of an electron beam directed to an x-ray emitting anode. The integral generator system includes an elongated, U-shaped unitary, molded plastic block mounted in the housing and includes a high voltage transformer having primary and secondary annular windings encased in a transformer portion of the block defining a central opening outside of the block for receiving a transformer core therethrough and, a capacitor-diode voltage multiplier stack connected to the secondary winding and having a positive node connectable to the anode and a negative node connectable to the cathode. A high voltage pulse width modulated switching circuit is connected to the primary annular winding to generate high voltages across said voltage multipler stack in order to control the energy of x-ray put out by the tube. A heater power supply supplies heater current to operate a heater in the tube. A focus element/grid control voltage power supply generates control voltages. A control circuit controls application of the control voltages to the focus element and the grid in order to switch the electron beam on and off in accordance with a preset value.

    摘要翻译： 脉冲精密x射线源包括小型化的内部自屏蔽X射线管和包含在手持壳体中的积分发生器，用于产生具有调节能级的x射线的定时脉冲串。 管内的控制栅格和聚焦电极使得能够精确地对通向X射线发射阳极的电子束进行开 - 关控制。 整体式发电机系统包括一个细长的U形整体模制的塑料块，安装在壳体中，并且包括一个高压变压器，其具有封装在块的变压器部分中的初级和次级环形绕组，该变压器部分限定了用于接收的块的中心开口 连接到次级绕组并具有可连接到阳极的正节点和可连接到阴极的负节点的电容器二极管电压倍增器堆叠。 高电压脉冲宽度调制开关电路连接到主环形绕组，以在所述电压倍增器堆叠上产生高电压，以便控制由管放出的x射线的能量。 加热器电源提供加热器电流以在管中操作加热器。 焦点元件/电网控制电压电源产生控制电压。 控制电路控制对焦点元件和栅格的控制电压的施加，以便根据预设值来打开和关闭电子束。