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    PORTABLE RADIO FREQUENCY IDENTIFICATION (RFID) READER
    3.
    发明申请
    PORTABLE RADIO FREQUENCY IDENTIFICATION (RFID) READER 有权
    便携式无线电频率识别（RFID）读取器

    公开(公告)号：US20110169613A1

    公开(公告)日：2011-07-14

    申请号：US12686922

    申请日：2010-01-13

    申请人： Ming Chen ,  Fong Shi ,  Kenneth G. Voyce

    发明人： Ming Chen ,  Fong Shi ,  Kenneth G. Voyce

    IPC分类号： H04Q5/22

    CPC分类号： G01S13/4445 ,  G01S3/043 ,  G01S13/4454 ,  G01S13/75

    摘要： A particular portable radio frequency identification (RFID) reader includes an active antenna array including a plurality of antenna elements to receive RFID signals from RFID devices. The antenna elements include control circuitry to control a beam pattern generated by the active antenna array. The portable RFID reader further includes sum circuitry and difference circuitry. The sum circuitry is operable to determine a sum signal by summing the RFID signals received by at least two of the plurality of antenna elements. The difference circuitry is operable to determine a difference signal between the RFID signals received by at least two of the plurality of antenna elements. The portable RFID reader also includes a controller to electronically steer the beam pattern and to determine a direction from the RFID reader to a particular RFID device.

    摘要翻译： 特定便携式射频识别（RFID）读取器包括有源天线阵列，其包括用于从RFID设备接收RFID信号的多个天线元件。 天线元件包括用于控制由有源天线阵列产生的波束图案的控制电路。 便携式RFID读取器还包括和电路和差分电路。 总和电路可操作以通过将由多个天线元件中的至少两个接收的RFID信号相加来确定和信号。 差分电路可操作以确定由多个天线元件中的至少两个天线元件接收的RFID信号之间的差分信号。 便携式RFID读取器还包括控制器，用于电子地操纵光束图案并确定从RFID读取器到特定RFID设备的方向。

    Portable radio frequency identification (RFID) reader
    4.
    发明授权
    Portable radio frequency identification (RFID) reader 有权
    便携式射频识别（RFID）阅读器

    公开(公告)号：US08461965B2

    公开(公告)日：2013-06-11

    申请号：US12686922

    申请日：2010-01-13

    申请人： Ming Chen ,  Fong Shi ,  Kenneth G. Voyce

    发明人： Ming Chen ,  Fong Shi ,  Kenneth G. Voyce

    IPC分类号： H04Q5/22

    CPC分类号： G01S13/4445 ,  G01S3/043 ,  G01S13/4454 ,  G01S13/75

    摘要： A particular portable radio frequency identification (RFID) reader includes an active antenna array including a plurality of antenna elements to receive RFID signals from RFID devices. The antenna elements include control circuitry to control a beam pattern generated by the active antenna array. The portable RFID reader further includes sum circuitry and difference circuitry. The sum circuitry is operable to determine a sum signal by summing the RFID signals received by at least two of the plurality of antenna elements. The difference circuitry is operable to determine a difference signal between the RFID signals received by at least two of the plurality of antenna elements. The portable RFID reader also includes a controller to electronically steer the beam pattern and to determine a direction from the RFID reader to a particular RFID device.

    摘要翻译： 特定便携式射频识别（RFID）读取器包括有源天线阵列，其包括用于从RFID设备接收RFID信号的多个天线元件。 天线元件包括用于控制由有源天线阵列产生的波束图案的控制电路。 便携式RFID读取器还包括和电路和差分电路。 总和电路可操作以通过将由多个天线元件中的至少两个接收的RFID信号相加来确定和信号。 差分电路可操作以确定由多个天线元件中的至少两个天线元件接收的RFID信号之间的差分信号。 便携式RFID读取器还包括控制器，用于电子地操纵光束图案并确定从RFID读取器到特定RFID设备的方向。

    Antenna beam steering
    5.
    发明授权
    Antenna beam steering 有权
    天线波束转向

    公开(公告)号：US07522102B2

    公开(公告)日：2009-04-21

    申请号：US11013840

    申请日：2004-12-16

    申请人： Fong Shi

    发明人： Fong Shi

    IPC分类号： H01Q3/00

    CPC分类号： H01Q3/26 ,  H01Q1/28 ,  H01Q3/30

    摘要： An antenna steering system is provided that includes a plurality of gyro sensors fixedly located in close proximity to an antenna, for example a phased array antenna. The gyro sensors measure angular rotation of the antenna about an X-axis of the antenna, about a Y-axis of the antenna and about a Z-axis of the antenna. The gyro sensors communicate the angular rotation measurement data to a beam steering phase controller (BSPhC). The BSPhC utilizes the angular rotation measurements to determine a predicted amount of movement, i.e. a change in geolocation and/or orientation, of the antenna within a specified time period. Based on the predicted amount of antenna movement, the BSPhC adjusts a beam pointing angle of the antenna, i.e. steers the antenna, to compensate for the predicted amount of movement.

    摘要翻译： 提供一种天线转向系统，其包括固定地靠近天线的多个陀螺仪传感器，例如相控阵天线。 陀螺传感器围绕天线的X轴，围绕天线的Y轴和天线的Z轴测量天线的角度旋转。 陀螺传感器将角度旋转测量数据传送到光束转向相位控制器（BSPhC）。 BSPhC利用角度旋转测量来确定预定的移动量，即在特定时间段内天线的地理定位和/或取向的变化。 基于预测的天线移动量，BSPhC调节天线的光束指向角，即引导天线，以补偿预测的移动量。

    Redundant power distribution system
    6.
    发明申请
    Redundant power distribution system 有权
    冗余配电系统

    公开(公告)号：US20050006956A1

    公开(公告)日：2005-01-13

    申请号：US10615705

    申请日：2003-07-09

    申请人： Fong Shi

    发明人： Fong Shi

    IPC分类号： H02J1/00

    CPC分类号： H02J1/102 ,  H02J9/06 ,  Y10T307/305 ,  Y10T307/391 ,  Y10T307/50 ,  Y10T307/615

    摘要： A redundant power distribution system (74) that has multiple distribution lines (168) and (174) includes multiple regulators (122). Multiple isolation transformers (124) are coupled to the regulators (122) and have isolation boundaries (261). An R(M/N) device circuit (152) is coupled to the isolation transformers (124). The regulators (122) and the isolation transformers (124) have a non-feedback looped configuration (259) across the isolation boundaries (261).

    摘要翻译： 具有多个分配线（168）和（174）的冗余配电系统（74）包括多个调节器（122）。 多个隔离变压器（124）耦合到调节器（122）并具有隔离边界（261）。 R（M / N）器件电路（152）耦合到隔离变压器（124）。 调节器（122）和隔离变压器（124）在隔离边界（261）上具有非反馈环路配置（259）。

    Redundant power distribution system
    7.
    发明授权
    Redundant power distribution system 有权
    冗余配电系统

    公开(公告)号：US07190090B2

    公开(公告)日：2007-03-13

    申请号：US10615705

    申请日：2003-07-09

    申请人： Fong Shi

    发明人： Fong Shi

    IPC分类号： H02J1/10

    CPC分类号： H02J1/102 ,  H02J9/06 ,  Y10T307/305 ,  Y10T307/391 ,  Y10T307/50 ,  Y10T307/615

    摘要： A redundant power distribution system (74) that has multiple distribution lines (168) and (174) includes multiple regulators (122). Multiple isolation transformers (124) are coupled to the regulators (122) and have isolation boundaries (261). A redundant regulator device circuit (152) is coupled to the isolation transformers (124) to regulate the multiple distribution lines where M (integer) out of N (integer) distribution lines are required so that the system continues to operate properly. The regulators (122) and the isolation transformers (124) have a non-feedback looped configuration (259) across the isolation boundaries (261).

    摘要翻译： 具有多个分配线（168）和（174）的冗余配电系统（74）包括多个调节器（122）。 多个隔离变压器（124）耦合到调节器（122）并具有隔离边界（261）。 冗余调节器设备电路（152）耦合到隔离变压器（124）以调节需要N（整数）分配线中的M（整数）的多个配线，使得系统继续正常运行。 调节器（122）和隔离变压器（124）在隔离边界（261）上具有非反馈环路配置（259）。

    Fault tolerant power distribution system
    9.
    发明授权
    Fault tolerant power distribution system 失效
    容错配电系统

    公开(公告)号：US5654859A

    公开(公告)日：1997-08-05

    申请号：US555700

    申请日：1995-11-14

    申请人： Fong Shi

    发明人： Fong Shi

    IPC分类号： H02J1/10 ,  H02J9/00 ,  H02H3/00

    CPC分类号： H02J9/00 ,  H02J1/10

    摘要： A power distribution circuit is provided that isolates both power source and load faults. In one embodiment, the power distribution circuit includes two power MOSFETs connected with the channels of the power MOSFETs in series and having their gates electrically connected together. The body diode of one power MOSFET is aligned with the opposite polarity with respect to polarity of the body diode of the second power MOSFET. The power MOSFETs are adapted to be coupled between a first power source and a load. The power distribution circuit also includes a first sensor that detects when the power MOSFETs conduct too much current and switches the power MOSFETs off by discharging the gate voltage of both power MOSFETs during such overcurrent conditions. Accordingly, when both power MOSFETs are switched off, the opposing polarity of the body diodes in the power MOSFETs ensures that one of the body diodes will be reversed biased in case of a short circuit failure in either the load or the power source. Incorporating N such power circuits in a power distribution module for distributing power from N power sources to a single load provides a fault tolerant power distribution module that can tolerate up to N-1 power source faults.

    摘要翻译： 提供了一种隔离电源和负载故障的配电电路。 在一个实施例中，功率分配电路包括与功率MOSFET的通道串联连接并且其栅极电连接在一起的两个功率MOSFET。 一个功率MOSFET的体二极管与第二功率MOSFET的体二极管的极性相反的极性对准。 功率MOSFET适于耦合在第一电源和负载之间。 功率分配电路还包括第一传感器，其检测功率MOSFET何时导通太多的电流，并且在这种过电流条件期间通过放电两个功率MOSFET的栅极电压来切断功率MOSFET。 因此，当两个功率MOSFET都断开时，功率MOSFET中体二极管的相反极性确保在负载或电源中短路故障的情况下，体二极管之一将被反向偏置。 将N个这样的电力电路并入用于将电力从N个电源分配到单个负载的配电模块中，提供容忍高达N-1个电源故障的容错配电模块。

    Fault tolerant clock with synchronized reset
    10.
    发明授权
    Fault tolerant clock with synchronized reset 失效
    容错时钟同步复位

    公开(公告)号：US5377205A

    公开(公告)日：1994-12-27

    申请号：US48658

    申请日：1993-04-15

    申请人： Fong Shi

    发明人： Fong Shi

    IPC分类号： G06F11/16 ,  G06F11/18 ,  G06F11/08 ,  H04L7/00

    CPC分类号： G06F11/1604 ,  G06F11/183 ,  G06F11/1679

    摘要： A fault tolerant clock system that includes voting of power-on and other reset signals to ensure tight synchronization. A fault tolerant clock system (10) includes four channels, providing tolerance to a catastrophic failure in one of the channels and a second fault in another channel. Each clock channel comprises a crystal oscillator (12), an RC circuit (14), and a gain circuit (16) that are connected in a feedback loop with a first voter module (18). The first voter module produces a voted time base output signal corresponding to a majority vote of the timing signals provided by each of the four clock channels. This voted time base signal is fed back to the crystal oscillator through the RC circuit. The RC circuit enhances the frequency pulling capability of the crystal oscillator, enabling its timing signal to be phase shifted over a relatively wide range so that it can be kept in phase and frequency synchronization with the timing signals from crystal oscillators in the other clock channels without need for critically trimming components. A second voter module (34) determines a majority vote of reset signals from each of the clock channels, and the voted reset signal is applied to an enable circuit (24) to reset the fault tolerant clock system. A power-on reset circuit (28) controls the duration of reset signal in each channel following a reset caused by application of power to the clock channel or due to manual or other resets, thereby providing sufficient time to enable the power supply and crystal oscillator to stabilize before the time base output signal of the clock channels is again enabled. The enable signal is processed through an optional deglitching circuit 22, which masks out possible glitches on the reset line. Preferably, the fault tolerant clock system is produced on an ASIC to achieve redundancy at the chip level.

    摘要翻译： 一种容错时钟系统，包括投票上电和其他复位信号，以确保紧密同步。 容错时钟系统（10）包括四个通道，其中一个信道中的灾难性故障和另一信道中的第二故障提供容限。 每个时钟通道包括晶体振荡器（12），RC电路（14）和增益电路（16），其在反馈回路中与第一选择器模块（18）连接。 第一选民模块产生对应于由四个时钟信道中的每一个提供的定时信号的多数投票的投票时基输出信号。 这个投票的时基信号通过RC电路反馈到晶体振荡器。 RC电路提高了晶体振荡器的频率牵引能力，使其定时信号能够在相对宽的范围内相移，从而可以将其定时信号与其他时钟通道中晶体振荡器的定时信号保持同相和频率同步，而无需 需要批量修剪组件。 第二选民模块（34）确定来自每个时钟信道的重置信号的多数票，并且所投票的复位信号被施加到使能电路（24）以复位容错时钟系统。 上电复位电路（28）控制在通过向时钟通道施加电源或由于手动或其他复位引起的复位后的每个通道中的复位信号的持续时间，由此提供足够的时间来使能电源和晶体振荡器 在时钟通道的时基输出信号再次使能之前稳定。 使能信号通过可选的去激励电路22进行处理，该电路遮蔽复位线上的可能的毛刺。 优选地，容错时钟系统在ASIC上产生以在芯片级实现冗余。