公开(公告)号：US08259666B2

公开(公告)日：2012-09-04

申请号：US13345465

申请日：2012-01-06

申请人： Derek Hongwei Bao ,  David Chiang

发明人： Derek Hongwei Bao ,  David Chiang

IPC分类号： H04W4/00

CPC分类号： H04W48/12 ,  H04W48/16 ,  H04W84/045

摘要： Femto cells that extend mobile network coverage into customer premises operate in a frequency band typically assigned to a macro network. To facilitate system discovery and registrations of mobile stations with femto cells, a carrier designates one the channels within the band as a primary channel for its femto cells. For example, neighbor list messages transmitted by macro network base stations can provide frequency and PN code information directing mobile stations to search the primary channel for a PN code of the femto cells. The mobile station preferred roaming list (PRL) may identify femto cells by SID/NID. The SID is that of the carrier's macro network, whereas the NID may be a NID of the macro network or one specifically assigned to femto cell operations. The PRL uses frequency acquisition information for the femto cells that is the same as or similar to that for one of the macro networks.

摘要翻译： 将移动网络覆盖扩展到客户驻地的毫微微小区在通常分配给宏网络的频带中操作。 为了促进具有毫微微小区的移动站的系统发现和注册，载波将频带内的信道指定为其毫微微小区的主要信道。 例如，由宏网络基站发送的邻居列表消息可以提供频率和PN码信息，其指示移动台在主信道上搜索毫微微小区的PN码。 移动台优选漫游列表（PRL）可以通过SID / NID来识别毫微微小区。 SID是运营商的宏网络的SID，而NID可以是宏网络的NID或专门分配给毫微微小区操作的NID。 PRL使用与一个宏网络相同或类似的毫微微小区的频率获取信息。

公开(公告)号：US20120094658A1

公开(公告)日：2012-04-19

申请号：US12906484

申请日：2010-10-18

申请人： John F. Macias ,  David Chiang ,  Mingxing Li ,  James F. Mathison ,  Said Hanbaly

发明人： John F. Macias ,  David Chiang ,  Mingxing Li ,  James F. Mathison ,  Said Hanbaly

IPC分类号： H04W4/00

CPC分类号： H04W4/50 ,  H04W48/18 ,  H04W84/045

摘要： A mobile device sends a request for a unique wireless network session identifier and receives, based on the request, the unique wireless network session identifier. The mobile device determines whether the unique wireless network session identifier includes a femtocell identifier. The mobile device applies one set of configuration settings when the unique wireless network session identifier includes the femtocell identifier, and applies a different set of configuration settings when the unique wireless network session identifier does not include the femtocell identifier.

摘要翻译： 移动设备发送对唯一无线网络会话标识符的请求，并且基于该请求接收唯一的无线网络会话标识符。 移动设备确定唯一无线网络会话标识符是否包括毫微微小区标识符。 当唯一无线网络会话标识符包括毫微微小区标识符时，移动设备应用一组配置设置，并且当唯一无线网络会话标识符不包括毫微微小区标识符时，应用不同的配置设置集合。

公开(公告)号：US20080084557A1

公开(公告)日：2008-04-10

申请号：US11599968

申请日：2006-11-15

申请人： Wei Song Tan ,  David Chiang ,  Todd Aldridge Russell

发明人： Wei Song Tan ,  David Chiang ,  Todd Aldridge Russell

IPC分类号： G01N21/958 ,  G01N21/95

CPC分类号： G01N21/8806 ,  G01N21/958 ,  G01N2021/9511

摘要： The present invention relates to an optical system that allows accurate projection and inspection of a curved surface onto a flat plane. The present invention may be used to prevent or mitigate inspection errors caused by particulate matter by narrowing the depth of field along a curved surface.

摘要翻译： 光学系统技术领域本发明涉及一种允许将曲面精确地投影到平面上的光学系统。 本发明可以用于通过沿着曲面缩小景深来防止或减轻由颗粒物质引起的检查误差。

公开(公告)号：US5450021A

公开(公告)日：1995-09-12

申请号：US234097

申请日：1994-04-28

申请人： David Chiang

发明人： David Chiang

IPC分类号： H03K19/0175 ,  H03K19/0185 ,  H03K19/094 ,  H03K19/177

CPC分类号： H03K19/17792 ,  H03K19/018507 ,  H03K19/09429 ,  H03K19/17704

摘要： A hybrid EPLD (chip) architecture has multiple first blocks each including a first type programmable AND array and multiple first type macrocells which are complex in structure and highly configurable; and multiple blocks each including a second type programmable AND array having fewer input lines and product term output lines than does the first type AND array, and multiple second type macrocells which have fewer logic gates than do the first type macrocells. The EPLD has a programmable interconnect matrix for interconnecting all the blocks.

摘要翻译： 混合EPLD（芯片）架构具有多个第一块，每个第一块包括第一类型可编程AND阵列和多个第一类型的宏单元，其结构复杂且高度可配置; 以及多个块，每个包括具有比第一类型AND阵列少的输入线和产品项输出线的第二类型可编程AND阵列，以及具有比第一类宏单元更少的逻辑门的多个第二类型宏单元。 EPLD具有用于互连所有块的可编程互连矩阵。

公开(公告)号：US5384499A

公开(公告)日：1995-01-24

申请号：US123435

申请日：1993-09-17

申请人： Bruce B. Pedersen ,  David Chiang ,  Francis B. Heile ,  Cameron McClintock ,  Hock-Chuen So ,  James A. Watson

发明人： Bruce B. Pedersen ,  David Chiang ,  Francis B. Heile ,  Cameron McClintock ,  Hock-Chuen So ,  James A. Watson

IPC分类号： H03K19/173 ,  H03K19/177

CPC分类号： H03K19/1776 ,  H03K19/1737 ,  H03K19/17728 ,  H03K19/17736 ,  H03K19/17764 ,  H03K19/17784 ,  H03K19/17792

摘要： A programmable logic device is presented comprising a global interconnect array whose lines are fed via programmable multiplexers to logic array blocks. The global interconnect array lines are fed to the multiplexers in a specific pattern which maximizes the user's ability to route a selected line to the output of a selected multiplexer, while at the same time maintaining higher speed and lower power consumption, and using less chip array than prior art programmable logic devices using programmable interconnect arrays based on erasable programmable read-only memories.

摘要翻译： 提出了一种可编程逻辑器件，其包括全局互连阵列，其线路经由可编程多路复用器馈送到逻辑阵列块。 全局互连阵列线以特定模式馈送到多路复用器，其最大化用户将所选线路路由到所选择的多路复用器的输出的能力，同时保持更高的速度和更低的功耗，并且使用更少的芯片阵列 比使用基于可擦除可编程只读存储器的可编程互连阵列的现有技术的可编程逻辑器件。

公开(公告)号：US5362999A

公开(公告)日：1994-11-08

申请号：US32920

申请日：1993-03-18

申请人： David Chiang

发明人： David Chiang

IPC分类号： H03K19/0175 ,  H03K19/0185 ,  H03K19/094 ,  H03K19/177

CPC分类号： H03K19/17792 ,  H03K19/018507 ,  H03K19/09429 ,  H03K19/17704

摘要： A hybrid EPLD (chip) architecture has multiple first blocks each including a first type programmable AND array and multiple first type macrocells which are complex in structure and highly configurable; and multiple blocks each including a second type programmable AND array having fewer input lines and product term output lines than does the first type AND array, and multiple second type macrocells which have fewer logic gates than do the first type macrocells. The EPLD has a programmable interconnect matrix for interconnecting all the blocks.

摘要翻译： 混合EPLD（芯片）架构具有多个第一块，每个第一块包括第一类型可编程AND阵列和多个第一类型的宏单元，其结构复杂且高度可配置; 以及多个块，每个包括具有比第一类型AND阵列少的输入线和产品项输出线的第二类型可编程AND阵列，以及具有比第一类宏单元更少的逻辑门的多个第二类型宏单元。 EPLD具有用于互连所有块的可编程互连矩阵。

公开(公告)号：US5329174A

公开(公告)日：1994-07-12

申请号：US965636

申请日：1992-10-23

申请人： David Chiang

发明人： David Chiang

IPC分类号： H03K3/356 ,  H03K17/22 ,  H03K17/16 ,  H03K3/26

CPC分类号： H03K3/356008 ,  H03K17/223

摘要： A feedback circuit for input pads of an integrated circuit where one or more of the input pads may not be bonded to a package pin when the pad is packaged or alternatively is bonded but the pin is not externally connected. The feedback circuit includes a transistor connected between the input pad and the output of the first associated input buffer so that whenever the integrated circuit is at a steady state, i.e. is off or has been powered on, no direct current is drawn by the pad because the unbonded pad is forced to be either in the high or low state by the feedback transistor. The feedback transistor may be a pull down device or a pull up device or a full inverting gate; in any case the feedback device draws no direct current when the input pad connected thereto is at its fully high or fully low state voltage.

摘要翻译： 一种用于集成电路的输入焊盘的反馈电路，其中一个或多个输入焊盘在焊盘封装或替代地接合但引脚不外部连接时，可能不会与封装引脚接合。 反馈电路包括连接在输入焊盘和第一相关联的输入缓冲器的输出之间的晶体管，使得每当集成电路处于稳定状态（即关断或已通电时），由于焊盘不会直接吸引电流，因为 未结合的焊盘被反馈晶体管强制为处于高或低状态。 反馈晶体管可以是下拉器件或上拉器件或全反相栅极; 在任何情况下，当与其连接的输入焊盘处于其完全高或完全低电压状态时，反馈装置不吸收直流电流。

公开(公告)号：US4438379A

公开(公告)日：1984-03-20

申请号：US273625

申请日：1981-06-15

申请人： David Chiang ,  Mosi Chu ,  Solomon Manber

发明人： David Chiang ,  Mosi Chu ,  Solomon Manber

IPC分类号： H02P8/32 ,  G05B19/40

CPC分类号： H02P8/32

摘要： For a stepping motor having a rotatable stator magnetic field for driving the rotor, there is disclosed a method of damping the oscillations of the rotor which occurs when the rotatable stator magnetic field is stopped upon arriving at a desired rotational position by measuring quantities related to the instantaneous velocity of the rotor due to the oscillations of the rotor about the desired rotational position, rotationally displacing the stator magnetic field from the desired rotational position in a direction opposite to the direction of the oscillation, and thereafter returning the stator magnetic field to the desired stopping position.

摘要翻译： 对于具有用于驱动转子的可旋转定子磁场的步进电动机，公开了一种阻尼转子振荡的方法，该方法是当可旋转的定子磁场在到达期望的旋转位置时停止，通过测量与 由于转子围绕期望的旋转位置的振荡而导致的转子的瞬时速度，在与振荡方向相反的方向上将定子磁场从期望的旋转位置旋转移位，然后将定子磁场返回到期望的 停止位置

公开(公告)号：US4330739A

公开(公告)日：1982-05-18

申请号：US229456

申请日：1981-01-29

申请人： David Chiang

发明人： David Chiang

IPC分类号： G01R31/34 ,  G05B19/40

CPC分类号： G01R31/34

摘要： A stepping motor system is shown wherein a method is employed for determining the optimum amplitude of the current supplied to the stator winding of the motor. A series of different currents are applied to the motor. First, the stator windings are energized with currents of certain base magnitudes. Then the current in one winding is increased by a small amount and the current in the adjacent winding is decreased by a small amount so that the rotor tends to move towards its new equilibrium position. When the rotor reaches its maximum displacement the current changes in the windings are reversed so that not only will the rotor "hunt" for its new equilibrium position but it overshoots with twice the magnitude. This process continues for certain period of time during which the oscillation magnitudes rapidly grow. In one embodiment, after a maximum amplitude is reached, the current changes are applied out of phase with the oscillations to now try to decrease their amplitude. After another period of time, the current changes are terminated, the residual oscillations are monitored and all oscillations greater than a given amplitude are recorded. As this process can be repeated for different base currents, that current which yields the minimum number of "over" oscillations during the monitoring period is selected as the current amplitude for subsequent use in positioning the rotor. In another embodiment, the damping portions of the method is not performed. Then, the base current is selected which results in the greatest number of "over" oscillations. According to another aspect of the invention, the oscillation is used to determine the torque for a given current.

摘要翻译： 示出了一种步进电机系统，其中采用一种方法来确定供应给电动机的定子绕组的电流的最佳幅度。 一系列不同的电流施加到电机。 首先，定子绕组以一定的基本量程的电流通电。 然后，一个绕组中的电流增加少量，并且相邻绕组中的电流减少少量，使得转子趋向于朝向新的平衡位置移动。 当转子达到其最大位移时，绕组中的电流变化是相反的，因此转子不仅将“寻找”其新的平衡位置，而且会超过两倍的幅度。 该过程持续一段时间，在此期间振荡幅度迅速增长。 在一个实施例中，在达到最大幅度之后，电流变化与振荡异相地施加，以便现在尝试降低它们的振幅。 在另一个时间段之后，当前的变化被终止，监视残余振荡，并且记录大于给定幅度的所有振荡。 由于对于不同的基极电流可以重复该过程，所以在监测期间产生最小数量的“过”振荡的电流被选择为随后用于定位转子的电流幅度。 在另一个实施例中，不执行该方法的阻尼部分。 然后，选择导致最大数量的“过”振荡的基极电流。 根据本发明的另一方面，振荡用于确定给定电流的转矩。

公开(公告)号：US4280084A

公开(公告)日：1981-07-21

申请号：US82742

申请日：1979-10-09

申请人： David Chiang

发明人： David Chiang

IPC分类号： G05B19/40 ,  H02P8/24

CPC分类号： H02P8/24 ,  G05B19/40

摘要： A method and apparatus for driving a stepping motor by angularly displacing the revolvable magnetic field with respect to the rotor by a first displacement angle in a given direction of revolution and then revolving the revolvable magnetic field, preferably with linearly increasing velocity and therefore maintaining constant displacement angle between the field and the rotor until the rotor rotates at a second velocity.

摘要翻译： 一种方法和装置，用于通过使旋转磁场相对于转子在给定的方向上以第一位移角度角度地移位，然后旋转可旋转磁场，优选地以线性增加的速度驱动步进电机，因此保持恒定的位移 直到转子以第二速度旋转为止。