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21. 发明授权

US4941256A Automatic visual measurement of surface mount device placement 失效
标题翻译：表面贴装装置的自动可视化测量
公开(公告)号：US4941256A
公开(公告)日：1990-07-17
申请号：US381790
申请日：1989-07-19
申请人： David W. Capson , Randy Tsang
发明人： David W. Capson , Randy Tsang
IPC分类号： H05K13/08
CPC分类号： H05K13/08 , Y10T29/49131 , Y10T29/49144
摘要： A method for inspecting the placement and alignment of surface mounted components on printed circuit boards during assembly. After the component is placed on the board, an infrared camera provides an image of leads on the component and corresponding soldering pads, to which the leads are to be soldered, on the board in a single exposure. The image is then processed by a computer and the position and orientations of the leads of the component with respect to the soldering pads are determined. As a result, any unsatisfactory misalignment of the component can be detected and defective printed circuit boards identified.
摘要翻译：一种用于在组装期间检查印刷电路板上的表面安装部件的放置和对准的方法。将组件放置在电路板上之后，红外摄像机可以在单个曝光中在板上提供组件上的导线图像和导线焊接到的相应焊盘。然后由计算机处理图像，并且确定部件的引线相对于焊盘的位置和取向。结果，可以检测到组件的任何不令人满意的未对准，并且识别出有缺陷的印刷电路板。

22. 发明授权

US08238453B1 Adaptive channel bandwidth selection for MIMO wireless systems 有权
标题翻译： MIMO无线系统的自适应信道带宽选择
公开(公告)号：US08238453B1
公开(公告)日：2012-08-07
申请号：US12748911
申请日：2010-03-29
申请人： Hui-Ling Lou , Kok-Wui Cheong , Randy Tsang
发明人： Hui-Ling Lou , Kok-Wui Cheong , Randy Tsang
IPC分类号： H04L27/00
CPC分类号： H04B1/38 , H04B7/0413 , H04B7/0891 , H04L1/0002 , H04L1/0625 , H04L5/0003 , H04L5/003 , H04L25/03343 , H04L2025/03426
摘要： A wireless communications device for a multiple input multiple output (MIMO) wireless communications system. The wireless communication device includes a radio frequency (RF) transceiver including at least two antennae. A medium access control (MAC) device to dynamically adjust a bandwidth of the wireless communications device by adjusting a number of channels associated with at least two antennae. The adjusting of the number of channels associated with at least two antennae is based at least on a transmission error rate or a correlation measurement.
摘要翻译：一种用于多输入多输出（MIMO）无线通信系统的无线通信设备。无线通信设备包括包括至少两个天线的射频（RF）收发器。一种媒体接入控制（MAC）设备，用于通过调整与至少两个天线相关联的信道的数量来动态地调整无线通信设备的带宽。与至少两个天线相关联的信道数量的调整至少基于传输错误率或相关性测量。

23. 发明授权

US07688898B1 Adaptive channel bandwidth selection for MIMO wireless systems 有权
标题翻译： MIMO无线系统的自适应信道带宽选择
公开(公告)号：US07688898B1
公开(公告)日：2010-03-30
申请号：US12480179
申请日：2009-06-08
申请人： Hui-Ling Lou , Kok-Wui Cheong , Randy Tsang
发明人： Hui-Ling Lou , Kok-Wui Cheong , Randy Tsang
IPC分类号： H04L27/00
CPC分类号： H04B1/38 , H04B7/0413 , H04B7/0891 , H04L1/0002 , H04L1/0625 , H04L5/0003 , H04L5/003 , H04L25/03343 , H04L2025/03426
摘要： A wireless communications device for a multiple input multiple output (MIMO) wireless communications system. The wireless communication device includes a radio frequency (RF) transceiver including at least two antennae. A medium access control (MAC) device to dynamically adjust a bandwidth of the wireless communications device by adjusting a number of channels associated with at least two antennae. The adjusting of the number of channels associated with at least two antennae is based at least on a transmission error rate or a correlation measurement.
摘要翻译：一种用于多输入多输出（MIMO）无线通信系统的无线通信设备。无线通信设备包括包括至少两个天线的射频（RF）收发器。一种媒体接入控制（MAC）设备，用于通过调整与至少两个天线相关联的信道的数量来动态地调整无线通信设备的带宽。与至少两个天线相关联的信道数量的调整至少基于传输错误率或相关性测量。

24. 发明授权

US07545867B1 Adaptive channel bandwidth selection for MIMO wireless systems 有权
标题翻译： MIMO无线系统的自适应信道带宽选择
公开(公告)号：US07545867B1
公开(公告)日：2009-06-09
申请号：US10743941
申请日：2003-12-23
申请人： Hui-Ling Lou , Kok-Wui Cheong , Randy Tsang
发明人： Hui-Ling Lou , Kok-Wui Cheong , Randy Tsang
IPC分类号： H04L27/00
CPC分类号： H04B1/38 , H04B7/0413 , H04B7/0891 , H04L1/0002 , H04L1/0625 , H04L5/0003 , H04L5/003 , H04L25/03343 , H04L2025/03426
摘要： A wireless communications device for a multiple input multiple output wireless communications system includes a radio frequency transceiver that includes at least two antennae and a medium access control device that includes a link adaptation module. The link adaptation module dynamically adjusts a bandwidth of the wireless communications device based on a transmission error rate and a correlation measurement at a remote wireless communications device. A transmission error module receives the transmission error rate from the remote wireless communications device and generates a transmission error control signal. A signal correlation module receives the correlation measurement from the remote wireless communication device and generates a signal correlation control signal. The link adaptation module adjusts at least one of the bandwidth and an amount of spatial multiplexing that is executed by a space-time processor based on the transmission error control signal and the signal correlation control signal.
摘要翻译：一种用于多输入多输出无线通信系统的无线通信设备，包括包括至少两个天线的射频收发器和包括链路适配模块的介质访问控制设备。链路适配模块基于远程无线通信设备的传输错误率和相关性测量来动态地调整无线通信设备的带宽。传输错误模块从远程无线通信设备接收传输错误率并产生传输错误控制信号。信号相关模块从远程无线通信设备接收相关测量，并生成信号相关控制信号。链路自适应模块基于传输错误控制信号和信号相关控制信号来调整由空时处理器执行的带宽和空间复用量中的至少一个。

25. 发明授权

US07528667B1 T-network capbank 有权
标题翻译： T网络capbank
公开(公告)号：US07528667B1
公开(公告)日：2009-05-05
申请号：US11489835
申请日：2006-07-19
申请人： Chun Geik Tan , Randy Tsang , Yonghua Song
发明人： Chun Geik Tan , Randy Tsang , Yonghua Song
IPC分类号： H03B5/08
CPC分类号： H03J1/0008 , H03B2201/0266 , H03J2200/10
摘要： A capacitor bank adapted to provide a variable capacitance to an electronic circuit is provided. The capacitor bank has at least a most significant bit and a least significant bit and includes a first capacitor cell having a first capacitance value and disposed between a first node and a second node, thereby forming the most significant bit. The capacitor bank also includes a second capacitor cell having a second capacitance value and disposed between the first node and the second node, thereby forming the least significant bit. The second capacitance value is less than the first capacitance value. Additionally, the second capacitor cell includes a first T-network capacitor unit in electrical communication with a source of a transistor and a second T-network capacitor unit in electrical communication with a drain of the transistor.
摘要翻译：提供一种适于向电子电路提供可变电容的电容器组。电容器组具有至少最高有效位和最低有效位，并且包括具有第一电容值并设置在第一节点和第二节点之间的第一电容器单元，从而形成最高有效位。电容器组还包括具有第二电容值并设置在第一节点和第二节点之间的第二电容器单元，从而形成最低有效位。第二电容值小于第一电容值。此外，第二电容器单元包括与晶体管的源电连通的第一T网络电容器单元和与晶体管的漏极电连通的第二T网络电容器单元。

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