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    • 91. 发明申请
    • GAIN CONTROL & FREQUENCY STABILITY IN DIGITALLY-CHANNELISED RF BI-DIRECTIONAL AMPLIFIERS
    • 数字通道RF双向放大器的增益控制和频率稳定性
    • US20110103434A1
    • 2011-05-05
    • US12908910
    • 2010-10-21
    • Lambertus Anthony M. VoskulenZheng LiMykola KyrylenkoMichael Leigh BeardJack Zaprianov Grozev
    • Lambertus Anthony M. VoskulenZheng LiMykola KyrylenkoMichael Leigh BeardJack Zaprianov Grozev
    • H04L25/60H04B7/14
    • H04B7/15542H03G3/3042H04B7/15535H04B2001/0416
    • Improved gain control for a digital signal processing (DSP) repeater, such as a bi-directional repeater, is disclosed. A repeater includes a back-end subsystem which comprises, for each channel in a set of wanted frequency channels that are amplified by the repeater, a coupler (314) arranged to provide a monitor signal corresponding with an output channel power level. A feedback loop (306) receives the monitoring signal, and incorporates a power control circuit (308) that compares the monitored output channel power level with a predetermined maximum output signal level (310). A corresponding control signal is generated, and provided to a variable attenuator (304) in order to maintain the individual output channel power level at or below the maximum output signal level (310). Advantageously, a DSP output level control function (404) is also provided, which maintains the output signal level of each digital channel below a maximum rated value for a digital-to-analogue converter (402). It is also advantageous to provide a front-end subsystem (420) including a variable gain attenuator (424) that is controlled by a signal (430) generated by a digital processing element (428) that monitors an output of an analogue-to-digital converter (426), in order to maintain an IF signal level at the analogue-to-digital converter input below a predetermined threshold value. An improved frequency stability control apparatus (600) and method (800) are also disclosed.
    • 公开了对诸如双向中继器的数字信号处理(DSP)中继器的改进的增益控制。 中继器包括后端子系统,对于由中继器放大的一组有用频率信道中的每个信道,包括:耦合器(314),被配置为提供对应于输出信道功率电平的监视信号。 反馈回路(306)接收监视信号,并且包括功率控制电路(308),其将所监视的输出通道功率电平与预定的最大输出信号电平进行比较(310)。 产生对应的控制信号,并将其提供给可变衰减器(304),以便将各个输出通道功率电平维持在或等于最大输出信号电平(310)。 有利地,还提供DSP输出电平控制功能(404),其将每个数字通道的输出信号电平维持在数模转换器(402)的最大额定值以下。 提供包括可变增益衰减器(424)的前端子系统(420)也是有利的,该可变增益衰减器(424)由数字处理元件(428)生成的信号(430)控制,该数字处理元件(428)监视模拟 - 数字转换器(426),以便将模数转换器输入端的IF信号电平维持在预定阈值以下。 还公开了一种改进的频率稳定性控制装置(600)和方法(800)。
    • 92. 发明授权
    • Method of optimum current blanking time implementation in current sense circuit
    • 电流检测电路实现最佳电流消隐时间的方法
    • US07868599B2
    • 2011-01-11
    • US11986775
    • 2007-11-26
    • Md Abidur RahmanHuijuan LiBrett E. SmithZheng Li
    • Md Abidur RahmanHuijuan LiBrett E. SmithZheng Li
    • G05F1/00
    • G01R19/0092H02M3/158H02M2001/0009
    • In a method and system for sensing current in a switching regulator (SWR) operating in a current mode, a power switch is coupled to receive the current from a switching element, the power switch being controlled by a gate signal. An inrush of the current causes an initial transient spike (ITS). A buffer having a buffer input and a buffer output is coupled to receive the gate signal and provide a buffered gate signal. The buffer output is disabled during the ITS. A sense switch (SW) is coupled to receive a portion of the current from the switching element, the SW being turned on by the buffered gate signal after the initial transient spike. A sense resistor (SR) is coupled to receive the portion of the current from the SW. An amplifier converts the portion of the current through the SR to a voltage signal for controlling the SWR.
    • 在用于感测以当前模式工作的开关调节器(SWR)中的电流的方法和系统中,电源开关被耦合以从开关元件接收电流,功率开关由门信号控制。 电流的浪涌导致初始瞬态尖峰(ITS)。 具有缓冲器输入和缓冲器输出的缓冲器被耦合以接收栅极信号并提供缓冲的栅极信号。 缓冲区输出在ITS期间被禁用。 感测开关(SW)被耦合以从开关元件接收电流的一部分,在初始瞬态尖峰之后,SW被缓冲的栅极信号导通。 耦合感测电阻器(SR)以从SW接收电流的一部分。 放大器将通过SR的电流的一部分转换成用于控制SWR的电压信号。
    • 95. 发明申请
    • Providing station context and mobility in a wireless local area network having a split MAC architecture
    • 在具有分割MAC架构的无线局域网中提供站上下文和移动性
    • US20090290537A1
    • 2009-11-26
    • US12154493
    • 2008-05-23
    • Jan Erik Johan BerglundZheng Li
    • Jan Erik Johan BerglundZheng Li
    • H04Q7/00
    • H04L61/2596H04L12/4633H04L29/12584H04L29/12839H04L61/6022
    • A method includes receiving a first frame at a wireless access node, the first frame being received through a first communication network and having a source address; applying a function (e.g., a hash function) to the source address to derive a destination address; encapsulating the first frame in a second frame that includes the destination address and a source address identifying the wireless access node; and sending the second frame to a second communication network for receipt by a destination node having the destination address. The destination node is an access controller that maintains state for a station that sends the first frame. The first communication network may be an IEEE 802.11 network, and the second communication network may be an IEEE 802.3 network. The address of the access controller is one of potentially many virtual MAC addresses associated with the access controller that enables an N:M relationship between a particular access node and a plurality of access controllers that may be clustered, and a N:1 relationship between a Station and a virtual access controller.
    • 一种方法包括在无线接入节点处接收第一帧,所述第一帧通过第一通信网络接收并具有源地址; 对源地址应用功能(例如,散列函数)以导出目的地地址; 将第一帧封装在包括目的地地址的第二帧和标识无线接入节点的源地址; 以及将所述第二帧发送到第二通信网络,以由具有所述目的地地址的目的地节点接收。 目的地节点是维护发送第一帧的站的状态的访问控制器。 第一通信网络可以是IEEE 802.11网络,并且第二通信网络可以是IEEE 802.3网络。 访问控制器的地址是与访问控制器相关联的潜在的许多虚拟MAC地址之一,该访问控制器实现特定访问节点与可能被聚集的多个访问控制器之间的N:M关系,以及N: 站和虚拟访问控制器。
    • 96. 发明申请
    • CANCER SPECIFIC PROMOTERS
    • 癌症特异性促进剂
    • US20080286860A1
    • 2008-11-20
    • US11626655
    • 2007-01-24
    • Mien-Chie HungChi-Ping DayKun-Ming RauXiaoming XieZheng Li
    • Mien-Chie HungChi-Ping DayKun-Ming RauXiaoming XieZheng Li
    • C12N15/00
    • C07K14/70582C07K14/82C12N9/93C12Q1/6886
    • The present invention regards cancer-specific control sequences that direct expression of a polynucleotide encoding a therapeutic gene product for treatment of the cancer. Specifically, the invention encompasses breast cancer-, prostate cancer-, and pancreatic cancer-specific control sequences. Two breast cancer-specific sequences utilize specific regions of topoisomerase IIα and transferrin receptor promoters, particularly in combination with an enhancer. The prostate cancer-specific and pancreatic cancer-specific control sequences utilize composites of tissue-specific control sequences, a two-step transcription amplification sequence, and a post-transcriptional control sequence. In more particular embodiments, these polynucleotides are administered in combination with liposomes.
    • 本发明涉及指导编码治疗性基因产物的多核苷酸的表达的癌症特异性控制序列,用于治疗癌症。 具体地,本发明包括乳腺癌,前列腺癌和胰腺癌特异性控制序列。 两个乳腺癌特异性序列利用拓扑异构酶IIal和转铁蛋白受体启动子的特异性区域,特别是与增强子组合。 前列腺癌特异性和胰腺癌特异性控制序列利用组织特异性控制序列的复合物,两步转录扩增序列和转录后控制序列。 在更具体的实施方案中,这些多核苷酸与脂质体组合施用。
    • 99. 发明授权
    • Electrical connector having receptacle contacts
    • 具有插座触点的电连接器
    • US06979237B2
    • 2005-12-27
    • US10428915
    • 2003-05-02
    • XinHai XiangZenCai TaoZheng Li
    • XinHai XiangZenCai TaoZheng Li
    • H01R13/11H01R13/115
    • H01R13/111
    • An electrical connector (1) includes an insulative housing (10) defining a number of passageways (14), and a number of receptacle contacts (20) received in the passageways of the insulative housing. Each receptacle contact has a body portion (22), a pair of arms (30) extending from the body portion, a pair of mating portions (32) formed on free ends of the arms, and a tail portion (24) extending from the body portion. Each mating portion has an upper and a lower enlarged portions (322,321). The upper enlarged portion is vertically aligned with the lower enlarged portion.
    • 电连接器(1)包括限定多个通道(14)的绝缘壳体(10)和容纳在绝缘壳体的通道中的多个插座触头(20)。 每个插座接触件具有主体部分(22),从主体部分延伸的一对臂(30),形成在臂的自由端上的一对配合部分(32)和从所述主体部分延伸的尾部(24) 身体部位。 每个配合部分具有上部和下部扩大部分(322,321)。 上部放大部分与下部放大部分垂直对齐。