公开(公告)号：US07624415B1

公开(公告)日：2009-11-24

申请号：US10420547

申请日：2003-04-17

申请人： WeiMin Zhang ,  Jeremy Woodburn

发明人： WeiMin Zhang ,  Jeremy Woodburn

IPC分类号： H04N7/173

CPC分类号： H04N7/17318 ,  H04N21/26616 ,  H04N21/4331 ,  H04N21/47202

摘要： A system for optimizing bandwidth of a video-on-demand system is provided. According to one aspect of the system, upon receiving a request from a first subscriber for a program, the system delivers the program to the first subscriber via a first communication channel. Upon receiving a request from a second subscriber for the same program, the system delivers only a beginning portion of the program to the second subscriber via a second communication channel and at the same time records a remaining portion of the program from the first communication channel. At the appropriate time, the recorded remaining portion of the program are shown to the second subscriber.

摘要翻译： 提供了一种用于优化视频点播系统的带宽的系统。 根据系统的一个方面，在从第一用户接收到用于节目的请求时，系统经由第一通信信道将节目传送给第一用户。 在从同一程序的第二用户接收到请求时，系统经由第二通信信道仅将节目的开始部分传送给第二用户，同时从第一通信信道记录节目的剩余部分。 在适当的时间，向第二用户显示节目的记录剩余部分。

公开(公告)号：US20090023887A1

公开(公告)日：2009-01-22

申请号：US11816047

申请日：2006-01-17

申请人： Martin Heeney ,  Iain McCulloch ,  Mark Giles ,  Guntram Koller ,  Weimin Zhang

发明人： Martin Heeney ,  Iain McCulloch ,  Mark Giles ,  Guntram Koller ,  Weimin Zhang

IPC分类号： C08G75/00

CPC分类号： H01L51/0036 ,  C08G61/126 ,  H01L51/0012 ,  H01L51/0545 ,  Y02E10/549 ,  Y02P70/521

摘要： The invention relates to a process of preparing regioregular polymers, in particular head-to-tail (HT) poly-(3-substituted) thiophenes with high regioregularity, to novel polymers prepared by this process, and to the use of the novel polymers as semiconductors or charge transport materials in optical, electrooptical or electronic devices including field effect transistors (FETs), electroluminescent, photovoltaic and sensor devices, to FETs and other semiconducting components or materials comprising the novel polymers.

摘要翻译： 本发明涉及一种制备区域性聚合物的方法，特别是具有高定向度的头 - 尾（HT）聚（3-取代的）噻吩至通过该方法制备的新型聚合物，以及将新型聚合物用作 包括场效应晶体管（FET），电致发光，光电和传感器装置在内的光学，电光或电子装置中的半导体或电荷传输材料到FET和其它半导体元件或包含新型聚合物的材料。

公开(公告)号：US06781473B1

公开(公告)日：2004-08-24

申请号：US10242947

申请日：2002-09-13

申请人： John S Chiu ,  Roger Stenerson ,  Sricharan Kasetti ,  WeiMin Zhang

发明人： John S Chiu ,  Roger Stenerson ,  Sricharan Kasetti ,  WeiMin Zhang

IPC分类号： H03B2100

CPC分类号： G06F1/0353 ,  G06F1/0342

摘要： Method and apparatus for generating sinusoidal signals in quadrature. A numerically controlled oscillator includes a phase accumulator configured to generate a periodic multi-bit signal at a given frequency; a first memory configured to store an octant of a sinusoidal waveform; a second memory configured to store a complementary octant of the sinusoidal waveform; and a control circuit, responsive to at least a portion of the phase accumulator signal and coupled to the first and second memories, the control circuit configured to access the first and second memories in parallel and construct respective sine and cosine waves at the given frequency.

摘要翻译： 用于产生正交正弦信号的方法和装置。 数控振荡器包括相位累加器，其被配置为以给定频率产生周期性多位信号; 配置为存储正弦波形的八分圆的第一存储器; 第二存储器，被配置为存储所述正弦波形的互补八分圆; 以及控制电路，响应于所述相位累加器信号的至少一部分并且耦合到所述第一和第二存储器，所述控制电路被配置为并行访问所述第一和第二存储器并且以给定频率构造相应的正弦和余弦波。

公开(公告)号：US5789978A

公开(公告)日：1998-08-04

申请号：US755952

申请日：1996-11-25

申请人： Weimin Zhang ,  Mark Adams ,  Cindy Yuen

发明人： Weimin Zhang ,  Mark Adams ,  Cindy Yuen

IPC分类号： H03F3/58 ,  H03F1/32 ,  H03F3/60 ,  H03F1/26

CPC分类号： H03F1/3276 ,  H03F1/3252

摘要： A Ku-band integrated pre-distortion type linearizer bridge circuit for use in linearizing the performance of a traveling wave tube amplifier. The linearizer bridge circuit comprises linearizer bridge that embodies a phase shifter and a fixed delay in a linear arm, and a Schottky diode distortion generator and a PIN diode attenuator in a nonlinear arm. The output of the linearizer bridge is coupled through an output amplifier and an output attenuator. The RF output signal from the linearizer bridge circuit is coupled to the traveling wave tube amplifier. A control circuit is coupled to the phase shifter, the nonlinear Schottky diode distortion generator circuit, and the PIN diode attenuator, and receives on and off input command signals, and outputs a bilevel telemetry signal that is used as a mode indicator for ground command control. The control circuit is used to adjust settings of the Schottky diode distortion generator, the phase shifter, the PIN diode attenuator, and adjust the gain and attenuation settings of the output amplifier and output attenuator. All circuits of the linearizer bridge circuit are integrated onto a single alumina substrate.

摘要翻译： Ku波段综合预失真型线性化电路桥接电路，用于线性化行波管放大器的性能。 线性化电路桥电路包括线性化桥，其包括线性臂中的移相器和固定延迟，以及非线性臂中的肖特基二极管失真发生器和PIN二极管衰减器。 线性化电桥的输出通过输出放大器和输出衰减器耦合。 来自线性化电桥电路的RF输出信号耦合到行波管放大器。 控制电路耦合到移相器，非线性肖特基二极管失真发生器电路和PIN二极管衰减器，并接收和关闭输入命令信号，并输出用作地面指令控制模式指示器的二级遥测信号 。 控制电路用于调整肖特基二极管失真发生器，移相器，PIN二极管衰减器的设置，并调整输出放大器和输出衰减器的增益和衰减设置。 线性化电桥电路的所有电路都集成在单个氧化铝基板上。

公开(公告)号：US10768100B2

公开(公告)日：2020-09-08

申请号：US16004303

申请日：2018-06-08

申请人： Weimin Zhang ,  Mengying Zhang

发明人： Weimin Zhang ,  Mengying Zhang

IPC分类号： G01N21/3504 ,  G08B21/12 ,  G01N1/22 ,  G01N33/00 ,  G01W1/00 ,  G08B21/18 ,  G01W1/02 ,  G01N21/35

摘要： A plurality of monitoring devices are arranged at different heights and steps, and infrared reflective assemblies of the monitoring device are set at different heights to collect infrared spectral data of chemical constituents of the air mass that are being diffused in airspace of different heights. The pollution factors contained in the air mass and the pollution level of each factor are learned by using IR spectrum for qualitative and quantitative analysis on the pollution factor, therefore realizing continuous monitoring in a certain area. Artificial duty is not required while 24-hour continuous intelligent monitoring can be achieved. Besides, meteorological data are collected in combination with the meteorological data collected by the meteorological information acquisition module at different heights and calculation is made based on the air diffusion model of various pollution factors to finally determine the position of air pollution source.

公开(公告)号：US08687656B2

公开(公告)日：2014-04-01

申请号：US13589827

申请日：2012-08-20

申请人： Weimin Zhang ,  Bin-Fan Liu

发明人： Weimin Zhang ,  Bin-Fan Liu

IPC分类号： H04L1/00

CPC分类号： H04N5/44 ,  H04L29/06027 ,  H04L65/604 ,  H04L65/607 ,  H04N19/107 ,  H04N19/12 ,  H04N19/134 ,  H04N19/172 ,  H04N19/40 ,  H04N19/61 ,  H04N19/85 ,  H04N21/4331 ,  H04N21/434 ,  H04N21/4383 ,  H04N21/4384 ,  H04N21/4385 ,  H04N21/482 ,  H04Q2213/13034 ,  H04Q2213/13174 ,  H04Q2213/13248

摘要： Methods, apparatuses, and systems are presented for switching between channels of encoded media data involving receiving encoded media data including reference frames and dependent frames for a plurality of channels, wherein each dependent frame refers to at least one reference frame. Frames associated with a first channel from the plurality of channels are decoded to generate a decoded signal for the first channel. While decoding frames associated with the first channel, data corresponding to at least one reference frame associated with a second channel from the plurality of channels are stored. In response to a control signal for switching from the first to the second channel, at least one dependent frame associated with the second channel is decoded by utilizing the stored data corresponding to the at least one reference frame associated with the second channel, to generate a decoded signal for the second channel.

摘要翻译： 呈现用于在编码媒体数据的信道之间切换的方法，装置和系统，所述编码媒体数据涉及接收包括用于多个信道的参考帧和相关帧的编码媒体数据，其中每个从属帧指的是至少一个参考帧。 与来自多个通道的第一通道相关联的帧被解码以产生用于第一通道的解码信号。 在解码与第一信道相关联的帧时，存储与来自多个信道的与第二信道相关联的至少一个参考帧的数据。 响应于用于从第一信道切换到第二信道的控制信号，通过利用对应于与第二信道相关联的至少一个参考帧的所存储的数据来解码与第二信道相关联的至少一个相关帧，以产生 第二通道的解码信号。

公开(公告)号：US20130044842A1

公开(公告)日：2013-02-21

申请号：US13213083

申请日：2011-08-19

申请人： Dan Wang ,  Huimin Guo ,  Wai Po Wong ,  Weimin Zhang

发明人： Dan Wang ,  Huimin Guo ,  Wai Po Wong ,  Weimin Zhang

IPC分类号： H04L27/08

CPC分类号： H04L27/08

摘要： A system for processing a wideband RF signal including at least an in-band signal and an out-of-band interference, comprising: an antenna; a low-noise amplifier (LNA), wherein gain of the LNA is variable and is controlled by a first gain-setting signal; a local oscillator for generating an oscillation signal at a first frequency that is spaced apart from the in-band signal carrier frequency by an intermediate frequency; a mixer for moving the in-band signal carrier frequency by the intermediate frequency and providing a variable conversion gain, which is controlled by a second gain-setting signal, to the in-band signal; a channel selection filter (CSF) for producing a desired-user signal; and an automatic gain control (AGC) unit for generating the first and second gain-setting signals derived from a desired LNA gain value, a desired mixer conversion gain value, strength of the in-band signal, and power of the out-of-band interference.

摘要翻译： 一种用于处理包括至少带内信号和带外干扰的宽带RF信号的系统，包括：天线; 低噪声放大器（LNA），其中LNA的增益是可变的并且由第一增益设置信号控制; 本地振荡器，用于产生与带内信号载波频率间隔中间频率的第一频率的振荡信号; 混合器，用于将带内信号载波频率移动中频，并将由第二增益设置信号控制的可变转换增益提供给带内信号; 用于产生期望用户信号的信道选择过滤器（CSF）; 以及自动增益控制（AGC）单元，用于产生从期望的LNA增益值导出的第一和第二增益设置信号，期望的混频器转换增益值，带内信号的强度和外带信号的功率， 频带干扰。

公开(公告)号：US20110165854A1

公开(公告)日：2011-07-07

申请号：US12683384

申请日：2010-01-06

申请人： Shuzuo LOU ,  Weimin ZHANG ,  Wai Po WONG ,  Gang QIAN

发明人： Shuzuo LOU ,  Weimin ZHANG ,  Wai Po WONG ,  Gang QIAN

IPC分类号： H04B1/10

CPC分类号： H03D7/1425 ,  H03D7/1441 ,  H03D7/1458 ,  H03D7/1483 ,  H03D7/1491 ,  H03D2200/0033 ,  H03D2200/0088

摘要： A circuit is provided for suppression of second-order intermodulation in a double-balanced mixer circuit. The circuit includes a duplicate transconductor element for duplicating AC current in a transconductor pair of the double-balanced mixer circuit. A fundamental cancellation element cancels a fundamental component of an AC current of the duplicate transconductor element, while preserving a second-order intermodulation component. A phase inversion element feeds an output current of the fundamental cancellation element to the transconductor pair of the double-balanced mixer circuit, to substantially remove the second-order intermodulation component from a differential output of the double-balanced mixer circuit.

摘要翻译： 提供一种用于抑制双平衡混频器电路中的二阶互调的电路。 该电路包括用于复制双平衡混频器电路的跨导体对中的交流电流的复制跨导元件。 基本的消除元件在保持二阶互调分量的同时抵消双重跨导元件的AC电流的基波分量。 相位反转元件将基波消除元件的输出电流馈送到双平衡混频器电路的跨导体对，以从双平衡混频器电路的差分输出基本上去除二阶互调分量。

公开(公告)号：US20110121404A1

公开(公告)日：2011-05-26

申请号：US12895813

申请日：2010-09-30

申请人： Lucian Shifren ,  Pushkar Ranade ,  Paul E. Gregory ,  Sachin R. Sonkusale ,  Weimin Zhang

发明人： Lucian Shifren ,  Pushkar Ranade ,  Paul E. Gregory ,  Sachin R. Sonkusale ,  Weimin Zhang

IPC分类号： H01L29/772 ,  H01L21/336

CPC分类号： H01L29/1083 ,  H01L21/823412 ,  H01L21/82345 ,  H01L21/823493 ,  H01L27/088 ,  H01L27/092 ,  H01L29/0847 ,  H01L29/1033 ,  H01L29/1045 ,  H01L29/36 ,  H01L29/66537 ,  H01L29/78 ,  H01L29/7816 ,  H01L29/7833 ,  H01L29/7836

摘要： An advanced transistor with punch through suppression includes a gate with length Lg, a well doped to have a first concentration of a dopant, and a screening region positioned under the gate and having a second concentration of dopant. The second concentration of dopant may be greater than 5×1018 dopant atoms per cm3. At least one punch through suppression region is disposed under the gate between the screening region and the well. The punch through suppression region has a third concentration of a dopant intermediate between the first concentration and the second concentration of dopant. A bias voltage may be applied to the well region to adjust a threshold voltage of the transistor.

摘要翻译： 具有穿通抑制的高级晶体管包括具有长度为Lg的阱，阱掺杂以具有掺杂剂的第一浓度，以及位于栅极下方并具有第二掺杂浓度的屏蔽区域。 掺杂剂的第二浓度可以大于每立方厘米5×1018个掺杂剂原子。 在筛选区域和井之间的栅极下方设置有至少一个穿孔抑制区域。 穿通抑制区域具有在第一浓度和第二浓度掺杂剂之间的掺杂剂的第三浓度。 可以将偏置电压施加到阱区域以调整晶体管的阈值电压。

公开(公告)号：US07809094B2

公开(公告)日：2010-10-05

申请号：US11872667

申请日：2007-10-15

申请人： Junyi Xu ,  Binfan Liu ,  Vladimir Radionov ,  Weimin Zhang

发明人： Junyi Xu ,  Binfan Liu ,  Vladimir Radionov ,  Weimin Zhang

IPC分类号： H03D1/04

CPC分类号： H04B1/0475

摘要： A device and method for canceling or attenuating harmonics noise without distorting the incoming signal. An exemplary device includes the use of an estimation loop to generate an artificial signal to eliminate or attenuate the influence of harmonics. The estimation loop includes a mixer adapted to produce a mixed signal by processing or combining the incoming signal and the artificial signal. The estimation loop includes an error detector, a low-pass filter, a parameter estimator, and a numerically controlled oscillator. The parameter estimator produces information relating to the phase, frequency, and amplitude of an incoming harmonics spur and will be used by the numerically controlled oscillator to generate the artificial signal. If the mixed signal contains relatively low levels of harmonics residuals, the mixed signal is produced at the output in lieu of the incoming signal.

摘要翻译： 用于消除或衰减谐波噪声而不使输入信号失真的装置和方法。 示例性装置包括使用估计环路来产生人造信号以消除或衰减谐波的影响。 估计环路包括适于通过处理或组合输入信号和人造信号来产生混合信号的混频器。 估计回路包括误差检测器，低通滤波器，参数估计器和数控振荡器。 参数估计器产生与输入谐波支路的相位，频率和幅度相关的信息，并由数控振荡器用于产生人为信号。 如果混合信号包含较低水平的谐波残差，则在输出端产生混合信号来代替输入信号。