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    METHOD AND APPARATUS FOR PROVIDING CARRIER SYNCHRONIZATION IN DIGITAL BROADCAST AND INTERACTIVE SYSTEMS
    3.
    发明申请
    METHOD AND APPARATUS FOR PROVIDING CARRIER SYNCHRONIZATION IN DIGITAL BROADCAST AND INTERACTIVE SYSTEMS 有权
    用于在数字广播和交互系统中提供载波同步的方法和装置

    公开(公告)号：US20110033016A1

    公开(公告)日：2011-02-10

    申请号：US12893843

    申请日：2010-09-29

    Applicant: Yimin Jiang ,  Feng-Wen Sun ,  Lin-Nan Lee ,  Neal Becker

    Inventor： Yimin Jiang ,  Feng-Wen Sun ,  Lin-Nan Lee ,  Neal Becker

    IPC: H04L7/00

    CPC classification number: H04L27/2272 ,  H04L7/048 ,  H04L2027/0028 ,  H04L2027/0055 ,  H04L2027/0067 ,  H04L2027/0093 ,  H04L2027/0095

    Abstract: An approach is provided for supporting carrier synchronization in a digital broadcast and interactive system. A carrier synchronization module receives one or more signals representing a frame that includes one or more overhead fields (e.g., preamble and optional pilot blocks and one or multiple segments separated by pilot blocks). The module estimates carrier frequency and phase on a segment by segment basis and tracks frequency between segments. Carrier phase of the signal is estimated based upon the overhead field. Estimates carrier phase of random data field are determined based upon the estimated phase values from the overhead fields, and upon both the past and future data signals. Further, the frequency of the signal is estimated based upon the overhead fields and/or the random data field. The above arrangement is particularly suited to a digital satellite broadcast and interactive system.

    Abstract translation: 提供了一种用于在数字广播和交互系统中支持载波同步的方法。 载波同步模块接收表示包括一个或多个开销字段（例如，前导码和可选导频块以及由导频块分隔的一个或多个片段）的帧的一个或多个信号。 该模块逐段估计载波频率和相位，并跟踪段之间的频率。 信号的载波相位基于开销字段来估计。 基于来自架空领域的估计相位值以及过去和未来数据信号来估计随机数据字段的载波相位。 此外，基于开销字段和/或随机数据字段来估计信号的频率。 上述布置特别适用于数字卫星广播和交互式系统。

    Soft start for a synchronous rectifier in a power converter
    6.
    发明授权
    Soft start for a synchronous rectifier in a power converter 有权
    电源转换器中同步整流器的软启动

    公开(公告)号：US06760235B2

    公开(公告)日：2004-07-06

    申请号：US10241336

    申请日：2002-09-11

    Applicant: Feng Lin ,  Ning Sun ,  Hengchun Mao ,  Yimin Jiang

    Inventor： Feng Lin ,  Ning Sun ,  Hengchun Mao ,  Yimin Jiang

    IPC: H02M3335

    CPC classification number: H02M1/36 ,  H02M3/33592 ,  Y02B70/1475

    Abstract: Circuit and method for controlling circuitry in a power converter device during a soft-start process is provided. Synchronous rectifier control circuitry is adapted to gradually apply a gate drive signal derived from the main switch of the power converter device to a freewheeling synchronous rectifier of the switching circuitry during the soft-start process. The control circuitry gradually releases the amplitude or the pulse-width of the gate drive signal to the freewheeling synchronous rectifier to avoid a large duty ratio in the synchronous rectifier during start-up so that a negative current does not build up in the output inductor.

    Abstract translation: 提供了在软启动过程中控制功率转换器装置中的电路的电路和方法。 同步整流器控制电路适于在软启动过程中逐渐将从功率转换器装置的主开关导出的栅极驱动信号施加到开关电路的续流同步整流器。 控制电路逐渐将栅极驱动信号的幅度或脉冲宽度释放到续流同步整流器，以避免启动期间同步整流器中的大占空比，从而在输出电感器中不产生负电流。

    Regulation circuit for a power converter and method of operation thereof
    7.
    发明授权
    Regulation circuit for a power converter and method of operation thereof 失效
    电力转换器的调节电路及其操作方法

    公开(公告)号：US06320764B1

    公开(公告)日：2001-11-20

    申请号：US09539690

    申请日：2000-03-31

    Applicant: Yimin Jiang ,  Hengchun Mao

    Inventor： Yimin Jiang ,  Hengchun Mao

    IPC: H02M3335

    CPC classification number: H02M3/33576 ,  H02M3/33523

    Abstract: A regulation circuit for a voltage-fed power converter, a method of operation thereof and a power converter employing the circuit or the method. The power converter has an inverter switch adapted to transfer power to a transformer. In one embodiment, the regulation circuit includes a switching network coupled to a tapped winding of the transformer. The switching network is operable to vary a turns ratio of the transformer, thereby regulating an output voltage of the power converter.

    Abstract translation: 用于电压馈送功率转换器的调节电路，其操作方法和采用该电路或方法的功率转换器。 功率转换器具有适于将功率传递到变压器的逆变器开关。 在一个实施例中，调节电路包括耦合到变压器的抽头绕组的开关网络。 交换网络可操作地改变变压器的匝数比，从而调节功率转换器的输出电压。

    Integrated three-phase power converter and method of operation thereof
    8.
    发明授权
    Integrated three-phase power converter and method of operation thereof 失效
    集成三相电源转换器及其工作方式

    公开(公告)号：US6026006A

    公开(公告)日：2000-02-15

    申请号：US157757

    申请日：1998-09-21

    Applicant: Yimin Jiang ,  Hengchun Mao

    Inventor： Yimin Jiang ,  Hengchun Mao

    IPC: H02M1/00 ,  H02M1/42 ,  H02M7/5387 ,  H02M3/335

    CPC classification number: H02M1/4216 ,  H02M1/4258 ,  Y02B70/126

    Abstract: An integrated three-phase power converter and method of operation thereof is provided. The integrated three-phase power converter includes: (1) first and second power switches coupled between corresponding rails of said power converter, (2) an input stage, including first, second and third L-C branches coupled between said first, second and third phase inputs and a node between said first and second power switches, adapted to receive phase voltages from a source of electrical power, and (3) an output stage, coupled to said first and second power switches, that provides a DC output voltage at said output, said first and second power switches cooperating to employ said input stage to reduce input current total harmonic distortion (THD) on all three of said phase inputs and said output stage to convert said phase voltages to said DC output voltage.

    Abstract translation: 提供一种集成的三相电力转换器及其操作方法。 集成的三相功率转换器包括：（1）耦合在所述功率转换器的相应导轨之间的第一和第二功率开关，（2）输入级，包括耦合在所述第一，第二和第三相之间的第一，第二和第三LC分支 输入和所述第一和第二功率开关之间的节点，适于从电源接收相电压;以及（3）耦合到所述第一和第二功率开关的输出级，其在所述输出端提供DC输出电压 所述第一和第二功率开关协同采用所述输入级以减少所有三相所述相位输入端和所述输出级上的输入电流总谐波失真（THD），以将所述相电压转换成所述直流输出电压。

    Dual mode split-boost converter and method of operation thereof
    9.
    发明授权
    Dual mode split-boost converter and method of operation thereof 失效
    双模分离升压转换器及其操作方法

    公开(公告)号：US6002241A

    公开(公告)日：1999-12-14

    申请号：US183076

    申请日：1998-10-30

    Applicant: Mark E. Jacobs ,  Yimin Jiang ,  Hengchun Mao

    Inventor： Mark E. Jacobs ,  Yimin Jiang ,  Hengchun Mao

    IPC: H02M3/158 ,  G05F1/613

    CPC classification number: H02M3/158 ,  Y10T307/505

    Abstract: A split-boost converter having a main inductor, first and second main switches and floating and fixed outputs and a method of operating the same. In one embodiment, the converter includes an auxiliary diode coupled between the main inductor and a first rail of the floating output, and an auxiliary switch coupled to a node between the main inductor and the auxiliary diode and a second rail of the floating output. The converter is operable in a first mode, when an input voltage of the converter at least equals an output voltage of the converter, in which the auxiliary switch remains open and the first and second main switches are modulated to operate the converter. The converter is further operable in a second mode, when an input voltage of the converter is less than an output voltage of the converter, in which the first and second main switches remain closed and the auxiliary switch is modulated to operate the converter.

    Abstract translation: 具有主电感器，第一和第二主开关以及浮动和固定输出的分压升压转换器及其操作方法。 在一个实施例中，转换器包括耦合在主电感器和浮动输出的第一导轨之间的辅助二极管以及耦合到主电感器和辅助二极管之间的节点的辅助开关和浮动输出的第二导轨。 当转换器的输入电压至少等于转换器的输出电压，其中辅助开关保持断开并且第一和第二主开关被调制以操作转换器时，转换器可在第一模式下操作。 当转换器的输入电压小于转换器的输出电压时，转换器进一步可操作，其中第一和第二主开关保持闭合，辅助开关被调制以操作转换器。

    Switching network and method of reducing input current total harmonic distortion associated with a boost converter and a boost converter employing the switching network or method
    10.
    发明授权
    Switching network and method of reducing input current total harmonic distortion associated with a boost converter and a boost converter employing the switching network or method 失效
    开关网络和降低与升压转换器和采用交换网络或方法的升压转换器相关联的输入电流总谐波失真的方法

    公开(公告)号：US5946203A

    公开(公告)日：1999-08-31

    申请号：US118261

    申请日：1998-07-17

    Applicant: Yimin Jiang ,  Hengchun Mao

    Inventor： Yimin Jiang ,  Hengchun Mao

    IPC: H02M1/00 ,  H02M1/42 ,  H02M1/14

    CPC classification number: H02M1/4216 ,  Y02B70/126

    Abstract: For use with a boost converter having first, second and third input inductors, a switching network, method of reducing input current total harmonic distortion (THD) associated with the boost converter, and boost converter employing the switching network and method. In one embodiment, the switching network includes a first switch coupled between corresponding rails of the boost converter. The switching network also includes first, second and third L-C resonant networks wye-coupled to a common node and coupled to the first, second and third input inductors, respectively. The first switch and the first, second and third L-C resonant networks cooperate to create resonant voltages across, and induce phase currents through, the first, second and third input inductors to reduce input current THD associated with the boost converter.

    Abstract translation: 用于具有第一，第二和第三输入电感器的升压转换器，开关网络，降低与升压转换器相关联的输入电流总谐波失真（THD）的方法，以及采用开关网络和方法的升压转换器。 在一个实施例中，开关网络包括耦合在升压转换器的相应导轨之间的第一开关。 开关网络还包括分别耦合到公共节点并耦合到第一，第二和第三输入电感器的第一，第二和第三L-C谐振网络。 第一开关和第一，第二和第三L-C谐振网络协作以产生跨越第一，第二和第三输入电感器的谐振电压并且引起相电流，以减小与升压转换器相关联的输入电流THD。

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