公开(公告)号：US20080239771A1

公开(公告)日：2008-10-02

申请号：US11834281

申请日：2007-08-06

Applicant: Chuanyun Wang ,  Ming Xu ,  Fred C. Lee

Inventor： Chuanyun Wang ,  Ming Xu ,  Fred C. Lee

IPC: H02M1/12

CPC classification number: H02M1/12 ,  H02M1/42 ,  H02M3/1584 ,  H02M2003/1586 ,  Y02B70/12

Abstract: In a power converter having m=two or more channels of power factor correction (PFC) circuits connected in parallel and an electromagnetic interference (EMI) filter connected in series therewith, phase shifts in switching between the respective PFC channels can allow increase of EMI filter corner frequency allowing reduction of size and cost of the EMI filter at some switching frequencies. Asymmetrical phase shifts (other than 360°/m) such as 360°/2m and other phase shifts and variations in m allow increase of EMI filter corner frequency at switching frequencies where symmetrical, 360°/m phase shifts provide no benefit to EMI filter design by providing cancellation or partial cancellation of different harmonics of the switching noise; which cancellation may be arranged to be complementary to the EMI filter function at more than one peak of the noise spectrum. (Such asymmetrical phase shifts do not significantly increase ripple and consequent switching noise). Alteration of m and corresponding alteration of phase shift may be performed adaptively for purposes of improving efficiency at light loads and the like.

Abstract translation: 在具有并联连接的m = 2个或更多个功率因数校正（PFC）电路的通道和与其串联连接的电磁干扰（EMI））滤波器的功率转换器中，在相应PFC通道之间的切换中的相移可允许增加EMI滤波器 转角频率允许在某些开关频率下降低EMI滤波器的尺寸和成本。 360°/ 2m以外的不对称相移（360°/ 2m）和其它相移以及m的变化允许在对称的开关频率下增加EMI滤波器转角频率，360°/ m相移对EMI滤波器无益 通过提供消除或部分消除开关噪声的不同谐波的设计; 该消除可以被布置为在噪声谱的多于一个峰值处与EMI滤波器功能互补。 （这种非对称相移不会显着增加纹波和随之而来的开关噪声）。 m的改变和相移的相应改变可以自适应地进行，以提高轻负载等的效率。

公开(公告)号：US20080199037A1

公开(公告)日：2008-08-21

申请号：US11709454

申请日：2007-02-21

Applicant: Ming Xu ,  Qing Ren Meng

Inventor： Ming Xu ,  Qing Ren Meng

IPC: H04R1/34

CPC classification number: H04R1/345 ,  H04R2201/021 ,  H04R2201/025

Abstract: An automatic tilt speaker has a first subassembly of a speaker unit enclosing an ordinary speaker element. The speaker unit includes a cone-shaped housing having an inner cavity for holding the speaker with its frame or basket fitted snugly in an annular frame. The housing of the speaker unit is pivotally connected to the frame by a pivot arm. The speaker housing has an arcuate exterior wall extending in a radius centered about the pivot connection of the frame. Centrally of the arcuate wall, there is a gear arch, which comprises a vertical column of horizontally elongated teeth extending substantially coplanar with the arcuate wall. On the annular frame at the diametrically opposite side of the pivot connection a tilting system is operatively connected with the teeth. The tilting system includes a motor with a reduction gearbox for driving a worm gear, which in turn drives the gear arch. The annular frame also supports a relay-based motor control board for controlling the polarity and power to the motor. Combined with the power control is a position sensing system including three slight ramp surfaces on the arcuate wall of the speaker unit which translates into three segmented tilting angles to be remotely selected to the user's listening preference.

Abstract translation: 自动倾斜扬声器具有包围普通扬声器元件的扬声器单元的第一子组件。 扬声器单元包括锥形壳体，其具有用于保持扬声器的内腔，其框架或篮子紧密地安装在环形框架中。 扬声器单元的壳体通过枢转臂枢转地连接到框架。 扬声器壳体具有以围绕框架的枢转连接为中心的半径延伸的弧形外壁。 在弧形壁的中央，有一个齿轮拱，其包括垂直于水平细长的齿，其基本上与弓形壁共面延伸。 在枢转连接的径向相对侧的环形框架上，倾斜系统与齿可操作地连接。 倾斜系统包括具有用于驱动蜗轮的减速齿轮箱的马达，其又驱动齿轮拱。 环形框架还支持基于继电器的电机控制板，用于控制电机的极性和功率。 与功率控制结合是位置感测系统，其包括在扬声器单元的弧形壁上的三个轻微的斜面，其转换成三个分段的倾斜角度，以被远程选择为用户的倾听倾向。

公开(公告)号：US07308545B1

公开(公告)日：2007-12-11

申请号：US10723493

申请日：2003-11-26

Applicant: Anand A. Kekre ,  Ronald S. Karr ,  John A. Colgrove ,  Kedar M. Karmarkar ,  Raghu Krishnamurthy ,  Saurabh R. Godbole ,  Ming Xu ,  Vikas K. Gupta ,  Deepak Tawri

Inventor： Anand A. Kekre ,  Ronald S. Karr ,  John A. Colgrove ,  Kedar M. Karmarkar ,  Raghu Krishnamurthy ,  Saurabh R. Godbole ,  Ming Xu ,  Vikas K. Gupta ,  Deepak Tawri

IPC: G06F12/00

CPC classification number: G06F11/2097 ,  G06F11/2023 ,  G06F2201/84 ,  H04L67/1095 ,  Y10S707/99953 ,  Y10S707/99955

Abstract: A method and system of providing periodic replication is disclosed. According to one embodiment, a method is provided which comprises creating a storage object corresponding to a storage volume, wherein the storage object comprises a point-in-time copy of the storage volume and a storage volume map; and replicating the storage volume using the storage object.

Abstract translation: 公开了提供周期性复制的方法和系统。 根据一个实施例，提供了一种方法，其包括创建对应于存储卷的存储对象，其中所述存储对象包括所述存储卷的时间点副本和存储卷映射; 并使用存储对象复制存储卷。

公开(公告)号：US07196914B2

公开(公告)日：2007-03-27

申请号：US10992227

申请日：2004-11-19

Applicant: Yuancheng Ren ,  Fred C. Lee ,  Ming Xu

Inventor： Yuancheng Ren ,  Fred C. Lee ,  Ming Xu

IPC: H02M3/335

CPC classification number: H02M3/33592 ,  H02M3/33569 ,  Y02B70/1433 ,  Y02B70/1475

Abstract: Power converters having reduced body diode conduction loss, reduced reverse recovery loss and lower switching noise, among other benefits, have a resonant capacitor Cr connected across an unfiltered output. The resonant capacitor Cr resonates with the leakage inductance Lk of the transformer. The resonant capacitor and leakage inductance are selected such that ½ a LC resonance period is equal to an ON time of each secondary switch S1 S2. The resonance provides zero current switching for secondary switches S1 S2, eliminates zero body diode conduction during dead times, and eliminates reverse recovery losses in the secondary switches. The present invention is applicable to many different circuit topologies such as full bridge, active clamp forward, push-pull forward, and center-tap secondary. The present converters provide high energy conversion efficiency and high frequency operation.

Abstract translation: 具有降低的体二极管导通损耗，降低的反向恢复损耗和较低开关噪声以及其他益处的功率转换器具有连接在未滤波输出端的谐振电容器Cr。 谐振电容器Cr与变压器的漏电感Lk共振。 谐振电容器和漏电感被选择为使得LC共振周期的1/2相当于每个次级开关S 1 S 2的导通时间。 谐振为次级开关S 1 S 2提供零电流开关，在死区时间消除零体二极管导通，并消除次级开关中的反向恢复损耗。 本发明可应用于许多不同的电路拓扑，例如全桥，有源钳前进，推挽前进和中心抽头次级。 本转换器提供高能量转换效率和高频操作。

公开(公告)号：US07167616B2

公开(公告)日：2007-01-23

申请号：US10923369

申请日：2004-08-20

Applicant: Peiching Ling ,  Wayne Lui ,  Jinliang Chen ,  Jianjun Zhang ,  Ming Xu ,  Yu Chen

Inventor： Peiching Ling ,  Wayne Lui ,  Jinliang Chen ,  Jianjun Zhang ,  Ming Xu ,  Yu Chen

IPC: G02B6/34

CPC classification number: G02B6/12007 ,  G02B6/124 ,  G02B6/125 ,  G02B6/29319 ,  G02B6/29323 ,  G02B2006/12097 ,  G02B2006/12145 ,  G02B2006/1215

Abstract: The present invention is a wavelength-selective optical transmission system that includes a first waveguide for transmitting a multiplexed optical signal therethrough. The system further includes a second waveguide coupled to the first waveguide wherein a least one of the first and second waveguides have a set of wavelength-selective Bragg gratings disposed near a coupling section between the first and second waveguides to reflect a reflecting optical signal back to the first waveguide and for transmitting a contra-directional optical signal and a co-directional optical signal having respectively a contra-directional selected wavelength and a co-directional selected wavelength corresponding to the Bragg gratings. One of the contra-directional and co-directional wavelengths is chosen as a designated wavelength, and the reflecting optical signal and one of the contra-directional or co-directional optical signals are outside of a predefined range surrounding the designated wavelength.

Abstract translation: 本发明是一种波长选择性光传输系统，其包括用于透过复用光信号的第一波导。 该系统还包括耦合到第一波导的第二波导，其中第一和第二波导中的至少一个波导具有布置在第一和第二波导之间的耦合部分附近的一组波长选择布拉格光栅，以将反射光信号反射回 第一波导和用于发送具有分别对应于布拉格光栅的反向选择波长和共同选择波长的双向光信号和同向光信号。 选择反向和同向波长中的一个作为指定波长，并且反射光信号和反向光信号之一以及指向波长周围的预定范围之外。

公开(公告)号：US20060253888A1

公开(公告)日：2006-11-09

申请号：US10543176

申请日：2004-01-29

Applicant: Satoshi Senga ,  Go Nakano ,  Sachiko Takeshita ,  Ming Xu

Inventor： Satoshi Senga ,  Go Nakano ,  Sachiko Takeshita ,  Ming Xu

IPC: H04N7/173

CPC classification number: H04W24/00 ,  H04L47/14 ,  H04L47/2475

Abstract: A communication control apparatus, communication terminal apparatus, server apparatus, and communication control method are provided that continue video and/or voice communication in a way that feels seamless to the user even when communication conditions change in a mobile environment. Newly introducing a lower layer management section that notifies an upper layer of lower layer information such as field intensity and network congestion into a conventional communication terminal apparatus, which is configured in such a way that this lower layer information is concealed from the application, enables the connection control section that provides the application's service generation environment to recognize lower layer information directly, and makes possible various kinds of status determination and control changes based on lower layer information at the application level.

公开(公告)号：US07071660B2

公开(公告)日：2006-07-04

申请号：US11018920

申请日：2004-12-22

Applicant: Ming Xu ,  Jinghai Zhou ,  Yuancheng Ren ,  Fred C. Lee ,  Jia Wei

Inventor： Ming Xu ,  Jinghai Zhou ,  Yuancheng Ren ,  Fred C. Lee ,  Jia Wei

IPC: H02M3/158

CPC classification number: H02M3/156 ,  H02M2001/0019 ,  H02M2001/0032 ,  H02M2001/007 ,  Y02B70/16

Abstract: A two-stage power converter that dynamically adjusts to output current requirements includes a first stage regulator that provides power to a second stage regulator. The first stage can be a buck converter, and the second stage can be a multiple-phase buck converter. The output voltage of the first stage (intermediate bus voltage Vbus) is varied according to the load current to optimize conversion efficiency. To provide maximum efficiency, the Vbus voltage is increased as load current increases. The Vbus voltage provided by the first stage can be varied by duty cycle or operating frequency control. In another embodiment, the switching frequency of the second stage is varied as output current changes so that output current ripple is held constant. In an embodiment employing a multiple-phase buck converter in the second stage, the number of operating phases are varied as output current changes.

Abstract translation: 动态调节输出电流要求的两级功率转换器包括为第二级调节器提供电源的第一级稳压器。 第一级可以是降压转换器，第二级可以是多相降压转换器。 第一级（中间总线电压Vbus）的输出电压根据负载电流而变化，以优化转换效率。 为了提供最大的效率，Vbus电压随着负载电流的增加而增加。 第一级提供的Vbus电压可以通过占空比或工作频率控制来改变。 在另一个实施例中，当输出电流改变时，第二级的开关频率变化，使得输出电流纹波保持恒定。 在第二级采用多相降压转换器的实施例中，随着输出电流的变化，工作阶段的数量变化。

公开(公告)号：US20060109696A1

公开(公告)日：2006-05-25

申请号：US11094434

申请日：2005-03-31

Applicant: Yuancheng Ren ,  Julu Sun ,  Ming Xu ,  Fred Lee

Inventor： Yuancheng Ren ,  Julu Sun ,  Ming Xu ,  Fred Lee

IPC: H02M7/757

CPC classification number: H02M3/33592 ,  H02M3/3376 ,  H02M2001/0058 ,  Y02B70/1433 ,  Y02B70/1475 ,  Y02B70/1491

Abstract: Power converters having reduced body diode conduction loss, reduced reverse recovery loss and lower switching noise, among other benefits, have a resonant capacitor Cr connected across an unfiltered output. The resonant capacitor Cr resonates with the leakage inductance Lk of the transformer. The resonant capacitor and leakage inductance are selected such that ½ a LC resonance period is equal to an ON time of each secondary switch S1 S2. The resonance provides zero current switching for secondary switches S1 S2, eliminates zero body diode conduction during dead times, and eliminates reverse recovery losses in the secondary switches. The present invention is applicable to many different circuit topologies such as full bridge, active clamp forward, push-pull forward, and center-tap secondary. The present converters provide high energy conversion efficiency and high frequency operation.

Abstract translation: 具有降低的体二极管导通损耗，降低的反向恢复损耗和较低开关噪声以及其他优点的功率转换器具有连接在未滤波输出端的谐振电容器Cr。 谐振电容器Cr与变压器的漏电感Lk共振。 选择谐振电容器和漏电感，使得LC谐振周期的1/2相当于每个次级开关S 1 S 2的导通时间。谐振为次级开关S 1 S 2提供零电流开关，消除零体二极管导通 并且消除了次级开关中的反向恢复损耗。 本发明可应用于许多不同的电路拓扑，例如全桥，有源钳前进，推挽前进和中心抽头次级。 本转换器提供高能量转换效率和高频操作。

公开(公告)号：US07023611B2

公开(公告)日：2006-04-04

申请号：US10077617

申请日：2002-02-15

Applicant: Tizhi Huang ,  Ming Xu ,  Chongchang Mao ,  Tiejun Xia ,  Wei Feng

Inventor： Tizhi Huang ,  Ming Xu ,  Chongchang Mao ,  Tiejun Xia ,  Wei Feng

IPC: H04B10/12

CPC classification number: H04B10/2941 ,  H04B10/0731

Abstract: Devices and methods for equalizing the gain of an optical amplifier are described. For devices including harmonic filters that are controllable by amplitude control voltages and phase control voltages, techniques for controlling the amplitude control voltages and phase control voltages are presented. Additionally, device architectures are described by which an incoming optical signal is equalized to compensate for uneven gain in prior amplifiers or other optical components, and in which the incoming optical signal is received at a beam displacer and separated into orthogonal component beams, wherein the beams are counter-propagated through the equalizer in opposite directions through the same spatial path so as to minimize or eliminate the effects spatially dependent imperfections in the equalizer.

公开(公告)号：US06989997B2

公开(公告)日：2006-01-24

申请号：US10603097

申请日：2003-06-25

Applicant: Ming Xu ,  Fred C. Lee

Inventor： Ming Xu ,  Fred C. Lee

IPC: H02M3/335

CPC classification number: H02M3/158 ,  H02M3/33576 ,  Y02B70/1425 ,  Y02B70/1433

Abstract: Buck converters having a resonant inductor Lr, resonant capacitor Cr, and synchronous switch Q3 that together provide reduced switching loss and soft switching. In operation, the resonant inductor Lr is charged during a time period A. Then, Lr is freewheeling and provides current to an output inductor Lo. Then, Q3 is turned OFF, and energy from the resonant inductor Lr charges the resonant capacitor Cr. Finally, energy from the resonant capacitor Cr is provided to the output inductor and load. The output power can be adjusted by phase control of the operation of switch Q3. In alternative embodiments, the circuit has a pair of coupled inductors L1 L2 or an isolation transformer 40. The coupled inductors have a polarity selected so that the output voltage is reduced, thereby allowing top switch Q1 to have a greater duty cycle. These circuits feature no body diode loss in the switch Q3.

Abstract translation: 具有谐振电感器Lr，谐振电容器Cr和同步开关Q 3的降压转换器一起提供降低的开关损耗和软开关。 在运行中，谐振电感器Lr在时间段A内被充电。然后，Lr是续流并且向输出电感器Lo提供电流。 然后，Q 3截止，来自谐振电感器Lr的能量对谐振电容器Cr充电。 最后，将谐振电容器Cr的能量提供给输出电感器和负载。 可以通过开关Q 3的操作的相位控制来调节输出功率。 在替代实施例中，电路具有一对耦合电感器L 1 L 2或隔离变压器40。 耦合电感器具有选择的极性，使得输出电压降低，从而允许顶部开关Q1具有更大的占空比。 这些电路在开关Q 3中没有体二极管损耗。