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    COMPENSATION OF I-Q IMBALANCE IN DIGITAL TRANSCEIVERS
    3.
    发明申请
    COMPENSATION OF I-Q IMBALANCE IN DIGITAL TRANSCEIVERS 有权
    数字收信人I-Q不平等的补偿

    公开(公告)号：US20070275674A1

    公开(公告)日：2007-11-29

    申请号：US11781185

    申请日：2007-07-20

    Applicant: Charles Chien

    Inventor： Charles Chien

    IPC: H04B1/40

    CPC classification number: H04L27/0014 ,  H04B1/30 ,  H04B17/20 ,  H04L2027/0016 ,  H04L2027/0024

    Abstract: A transceiver includes a switching unit configurable for isolating an input of a receiver from an output of a transmitter during a local calibration mode. A known signal present at the output at a first power level during the calibration mode will also be present at the input at a second power level lower than the first power level and will be converted by the quadrature demodulator. A compensation factor is estimated for compensating the receiver section for imbalances in the in-phase and quadrature phase signals resulting from conversion of the known signal. Remote calibration is implemented using a method for remotely compensating for I-Q imbalance wherein a data packet having a known signal is transmitted to a receiver for conversion by a quadrature demodulator and compensation factors are estimated for compensating for imbalances in the in-phase and quadrature phase signals resulting from conversion of the known signal.

    Abstract translation: 收发器包括可配置用于在局部校准模式期间将接收机的输入与发射机的输出隔离的开关单元。 在校准模式期间以第一功率电平存在于输出处的已知信号也将以低于第一功率电平的第二功率电平存在于输入端，并将由正交解调器转换。 估计补偿因子用于补偿接收机部分，用于由已知信号的转换产生的同相和正交相位信号中的不平衡。 使用用于远程补偿IQ不平衡的方法来实现远程校准，其中具有已知信号的数据分组被发送到接收机以由正交解调器进行转换，并且估计补偿因子以补偿同相和正交相位信号中的不平衡 由已知信号的转换产生。

    LO leakage and sideband image calibration system and method
    4.
    发明授权
    LO leakage and sideband image calibration system and method 有权
    LO泄漏和边带图像校准系统及方法

    公开(公告)号：US07280805B2

    公开(公告)日：2007-10-09

    申请号：US10888842

    申请日：2004-07-09

    Applicant: Zhiwei Xu ,  Shan Jiang ,  Charles Chien

    Inventor： Zhiwei Xu ,  Shan Jiang ,  Charles Chien

    IPC: H04B17/00 ,  H03C1/62

    CPC classification number: H04B1/0475

    Abstract: A system or method for calibrating an RF transmitter includes inputting a test tone to the RF transmitter. LO leakage calibration is performed on an output of the RF transmitter with the test tone inputted thereto, in order to determine a minimum LO leakage. Thereafter, sideband image calibration is performed on the output of the RF transmitter with the test tone inputted thereto, in order to determine a minimum sideband image. Operational values for the RF transmitter are stored in memory based on the detected minimum LO leakage and the detected minimum sideband image, to be used during a normal operation mode of the RF transmitter.

    Abstract translation: 用于校准RF发射机的系统或方法包括将测试音调输入到RF发射机。 在输入了测试音的RF发射机的输出上执行LO泄漏校准，以便确定最小的LO泄漏。 此后，对输入了测试音的RF发射机的输出执行边带图像校准，以便确定最小边带图像。 基于检测到的最小LO泄漏和检测到的最小边带图像将RF发射机的操作值存储在存储器中，以在RF发射机的正常操作模式期间使用。

    Method of reconfiguration of radio parameters for power-aware and adaptive communications
    5.
    发明授权
    Method of reconfiguration of radio parameters for power-aware and adaptive communications 有权
    重新配置功率感知和自适应通信的无线电参数的方法

    公开(公告)号：US06807227B2

    公开(公告)日：2004-10-19

    申请号：US10055261

    申请日：2001-10-25

    Applicant: Charles Chien

    Inventor： Charles Chien

    IPC: H04B1700

    CPC classification number: H04L1/0071 ,  H04L1/0002 ,  H04L1/0009 ,  H04L1/0025 ,  H04L1/20 ,  H04L25/0202

    Abstract: The invention monitors a communication channel and estimates its characteristics from time to time, thus providing a dynamic estimate of channel characteristics. Based on the channel characteristics, a control processor calculates a preferred configuration of digital (and optionally, analog) signal processing to best manage the available energy for the present channel characteristics. The selected configuration is then down-loaded into communication modules stored in extra memory during runtime. The communication modules preferably include a one or more of: a reconfigurable forward error correcting codec (with adjustable code lengths and a plurality of code choices); a reconfigurable interleaver with adjustable depth; a decision feedback equalizer (DFE) with a reconfigurable number of taps; maximum likelihood sequence estimator with an adjustable number of states; a frequency hopping coder with an adjustable number of hops or hop rate; and a direct-sequence (or direct sequence spread spectrum) codec with an adjustable number of chips per bit.

    Abstract translation: 本发明监测通信信道并随时估计其特性，从而提供信道特性的动态估计。 基于信道特性，控制处理器计算数字（和可选地，模拟）信号处理的优选配置，以最佳地管理当前信道特性的可用能量。 所选配置然后在运行时被下载到存储在额外内存中的通信模块中。 通信模块优选地包括以下中的一个或多个：可重新配置的前向纠错编解码器（具有可调节的代码长度和多个代码选择）; 具有可调深度的可重构交错器; 具有可重构数量的抽头的判决反馈均衡器（DFE）; 具有可调数状态的最大似然序列估计器; 具有可调跳数或跳频率的跳频编码器; 以及每位可调节数量的芯片的直接序列（或直接序列扩频）编解码器。

    Cross coupled high frequency buffer
    6.
    发明授权
    Cross coupled high frequency buffer 有权
    交叉耦合高频缓冲器

    公开(公告)号：US07860470B2

    公开(公告)日：2010-12-28

    申请号：US11781198

    申请日：2007-07-20

    Applicant: Zhiwei Xu ,  Heng-Yu Jian ,  Yi-Cheng Wu ,  Charles Chien

    Inventor： Zhiwei Xu ,  Heng-Yu Jian ,  Yi-Cheng Wu ,  Charles Chien

    IPC: H03J7/32

    CPC classification number: H04B1/30 ,  H03F3/245 ,  H03F3/45183 ,  H03F3/45237 ,  H03F2203/45631 ,  H03F2203/45638

    Abstract: A local oscillator (LO) buffer circuit comprises first and second LO buffers arranged in a cross coupled configuration. The first LO buffer generates in-phase output signals in response to in-phase input signals, and quadrature output signals from the second LO buffer. The second LO buffer generates the quadrature output signals in response to quadrature input signals and the in-phase output signals. The LO buffers may include inductive loads. The LO buffers may include MOS transistors or bipolar junction transistors.

    Abstract translation: 本地振荡器（LO）缓冲电路包括以交叉耦合配置布置的第一和第二LO缓冲器。 第一LO缓冲器响应于同相输入信号和来自第二LO缓冲器的正交输出信号产生同相输出信号。 第二LO缓冲器响应于正交输入信号和同相输出信号产生正交输出信号。 LO缓冲器可以包括感性负载。 LO缓冲器可以包括MOS晶体管或双极结型晶体管。

    LIQUID CRYSTAL DISPLAY PANEL AND METHOD FOR MANUFACTURING THE SAME
    7.
    发明申请
    LIQUID CRYSTAL DISPLAY PANEL AND METHOD FOR MANUFACTURING THE SAME 有权
    液晶显示面板及其制造方法

    公开(公告)号：US20100123865A1

    公开(公告)日：2010-05-20

    申请号：US12617878

    申请日：2009-11-13

    Applicant: CHARLES CHIEN ,  SHANG-YU HUANG ,  TSAU-HUA HSIEH ,  CHIEN-TING LAI

    Inventor： CHARLES CHIEN ,  SHANG-YU HUANG ,  TSAU-HUA HSIEH ,  CHIEN-TING LAI

    IPC: G02F1/1343 ,  G02F1/13

    CPC classification number: H05F3/00 ,  G02F1/1303 ,  G02F1/133345 ,  G02F1/134336 ,  G02F1/13439 ,  G02F1/1345 ,  G02F1/13452 ,  G02F2202/22

    Abstract: An exemplary liquid crystal display panel includes a substrate and first conductive wires. The first conductive wires are arranged at a surface of the substrate. Each of the first conductive wires includes a plurality of first connecting portions, a plurality of second connecting portions and a conductive portion with a plurality of conductive particles. The conductive portion is sandwiched between the first connecting portions and the second connecting portions, thus electrically connecting the first connecting portions to the second connecting portions. A method for manufacturing the liquid crystal display panel is also provided.

    Abstract translation: 示例性液晶显示面板包括基板和第一导线。 第一导线布置在基板的表面。 每个第一导线包括多个第一连接部分，多个第二连接部分和具有多个导电粒子的导电部分。 导电部分夹在第一连接部分和第二连接部分之间，从而将第一连接部分电连接到第二连接部分。 还提供了一种用于制造液晶显示面板的方法。

    Method and system for calibration of a tank circuit in a phase lock loop
    8.
    发明授权
    Method and system for calibration of a tank circuit in a phase lock loop 有权
    在锁相环中调节电路的方法和系统

    公开(公告)号：US07609122B2

    公开(公告)日：2009-10-27

    申请号：US11868306

    申请日：2007-10-05

    Applicant: Heng-Yu Jian ,  Zhiwei Xu ,  Yi-Cheng Wu ,  Charles Chien

    Inventor： Heng-Yu Jian ,  Zhiwei Xu ,  Yi-Cheng Wu ,  Charles Chien

    IPC: H03B5/08

    CPC classification number: H03L7/10 ,  H03L7/099

    Abstract: A phase lock loop (PLL) includes a calibration loop for calibrating a tank circuit for capacitance variation through process variations of manufacturing an integrated circuit including the PLL. A capacitance profile for setting the frequency of the PLL at a process comer is stored. At power up, or after an idle time, a calibration is performed at two frequencies. The capacitances of operating the phase lock loop at the two frequencies are determined and stored. During a frequency change, the capacitance of operating the PLL is determined from the capacitance profile and stored capacitances. The capacitance of the PLL is presumed to change linearly with frequency and the two stored capacitances are used to determine a difference capacitance at the selected frequency by linear interpolating between the two stored capacitances, which is added to the capacitance in the capacitance profile at the selected frequency to generate an operating capacitance.

    Abstract translation: 锁相环（PLL）包括用于通过制造包括PLL的集成电路的过程变化校准用于电容变化的振荡电路的校准回路。 存储用于在处理角设定PLL的频率的电容分布。 在上电或空闲时间后，以两个频率进行校准。 确定并存储在两个频率下操作锁相环的电容。 在频率变化期间，操作PLL的电容由电容曲线和存储的电容确定。 假设PLL的电容随频率线性变化，并且两个存储的电容用于通过在所选择的电容分布中的电容相加的两个存储的电容之间的线性内插来确定所选频率处的差电容， 产生一个工作电容的频率。

    Cross Coupled High Frequency Buffer
    9.
    发明申请
    Cross Coupled High Frequency Buffer 有权
    交叉耦合高频缓冲器

    公开(公告)号：US20090023413A1

    公开(公告)日：2009-01-22

    申请号：US11781198

    申请日：2007-07-20

    Applicant: Zhiwei XU ,  Heng-Yu JIAN ,  Yi-Cheng WU ,  Charles CHIEN

    Inventor： Zhiwei XU ,  Heng-Yu JIAN ,  Yi-Cheng WU ,  Charles CHIEN

    IPC: H04B1/26

    CPC classification number: H04B1/30 ,  H03F3/245 ,  H03F3/45183 ,  H03F3/45237 ,  H03F2203/45631 ,  H03F2203/45638

    Abstract: A local oscillator (LO) buffer circuit comprises first and second LO buffers arranged in a cross coupled configuration. The first LO buffer generates in-phase output signals in response to in-phase input signals, and quadrature output signals from the second LO buffer. The second LO buffer generates the quadrature output signals in response to quadrature input signals and the in-phase output signals. The LO buffers may include inductive loads. The LO buffers may include MOS transistors or bipolar junction transistors.

    Abstract translation: 本地振荡器（LO）缓冲电路包括以交叉耦合配置布置的第一和第二LO缓冲器。 第一LO缓冲器响应于同相输入信号和来自第二LO缓冲器的正交输出信号产生同相输出信号。 第二LO缓冲器响应于正交输入信号和同相输出信号产生正交输出信号。 LO缓冲器可以包括感性负载。 LO缓冲器可以包括MOS晶体管或双极结型晶体管。

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