公开(公告)号：US6154093A

公开(公告)日：2000-11-28

申请号：US53407

申请日：1998-04-01

申请人： Jiunn-Tsair Chen ,  Young-Kai Chen ,  Huan-Shang Tsai

发明人： Jiunn-Tsair Chen ,  Young-Kai Chen ,  Huan-Shang Tsai

IPC分类号： H03F1/32 ,  H03F1/00

CPC分类号： H03F1/3229

摘要： A feedforward linearizer for amplifying an input signal comprises a signal cancellation circuit which has a first branch and a second branch. A first amplifier provided in the first branch receives the input signal intended to be amplified and generates an output signal received by a signal cancellation vector modulator. A signal cancellation adder receives the signal generated by the signal cancellation vector modulator and the input signal via the second branch and provides an error signal. The feedforward linearizer also comprises an error cancellation circuit that has a first branch and a second branch. An error cancellation adder in the first branch receives the output signal provided by the first amplifier and generates the output signal of the linearizer. An error cancellation vector modulator in the second branch receives an error signal provided by the signal cancellation adder and provides an error adjusted signal to a second auxiliary amplifier. The second auxiliary amplifier provides an input signal to the error cancellation adder. A digital signal processor provides a signal cancellation adjustment signal, .alpha., to the signal cancellation vector modulator and an error cancellation adjustment signal, .beta., to the error cancellation vector modulator respectively, such that the output signal of the signal cancellation adder is a signal that substantially represents the error components provided by the first amplifier, and the output signal of the error cancellation adder is an amplified version of the input signal, with substantially no internmodulation components.

摘要翻译： 用于放大输入信号的前馈线性化电路包括具有第一分支和第二分支的信号消除电路。 设置在第一分支中的第一放大器接收要被放大的输入信号，并产生由信号消除矢量调制器接收的输出信号。 信号消除加法器通过第二分支器接收由信号消除矢量调制器产生的信号和输入信号，并提供误差信号。 前馈线性化电路还包括具有第一分支和第二分支的误差消除电路。 第一分支中的误差消除加法器接收由第一放大器提供的输出信号，并产生线性化器的输出信号。 第二分支中的误差消除矢量调制器接收由信号消除加法器提供的误差信号，并向第二辅助放大器提供误差调整信号。 第二辅助放大器向误差消除加法器提供输入信号。 数字信号处理器分别向信号消除矢量调制器提供信号消除调整信号α，并将误差消除调整信号β分别提供给误差消除矢量调制器，使得信号消除加法器的输出信号是 基本上表示由第一放大器提供的误差分量，误差消除加法器的输出信号是输入信号的放大版本，基本上没有内部调制分量。

公开(公告)号：US5832365A

公开(公告)日：1998-11-03

申请号：US723812

申请日：1996-09-30

申请人： Young-Kai Chen ,  Jenshan Lin

发明人： Young-Kai Chen ,  Jenshan Lin

IPC分类号： H01Q3/30 ,  H01Q1/00 ,  H01Q3/38 ,  H01Q23/00 ,  H04B7/15 ,  H04B7/26 ,  H04B7/14

CPC分类号： H01Q3/385 ,  H01Q1/007 ,  H01Q23/00 ,  H04B7/1555

摘要： An indoor wireless communications system using two-way active-antenna repeaters to distribute signals received from external signal sources within an office, and to extend the range of cordless phone units in use there, is disclosed. The repeaters provide menu-selectable phase-shifting, selectable receiver sensitivity and transmitter power, and selectable signal format conversion to provide added privacy and to prevent interference with communication links in use by third parties within the building. Pattern selection is done by empirical adjustment of an antenna pattern suited to the general floor plan of the area served.

摘要翻译： 公开了一种使用双向有源天线中继器来分配从办公室内的外部信号源接收到的信号并扩展其中使用的无绳电话单元的范围的室内无线通信系统。 中继器提供菜单选择的相移，可选择的接收机灵敏度和发射机功率，以及可选择的信号格式转换，以提供附加的隐私，并防止对建筑物内第三方使用的通信链路的干扰。 模式选择通过对适用于所服务区域的一般平面图的天线方向图的经验调整来完成。

公开(公告)号：US08903238B2

公开(公告)日：2014-12-02

申请号：US13608531

申请日：2012-09-10

申请人： Timo J. Pfau ,  Noriaki Kaneda ,  Young-Kai Chen

发明人： Timo J. Pfau ,  Noriaki Kaneda ,  Young-Kai Chen

IPC分类号： H04J14/06 ,  H04J4/00 ,  H04B10/00 ,  H04B10/12

CPC分类号： H04J14/06 ,  H04B10/516 ,  H04J14/026 ,  H04J14/0298 ,  H04L27/2096 ,  H04L27/2697 ,  H04L27/34

摘要： A system, e.g. for optical communication, includes an I-Q modulator and a transmission signal processor. The I-Q modulator is configured to modulate a first light source in response to first I and Q modulation signals. The transmission signal processor is configured to receive a data stream including data corresponding to a first data subchannel. The processor maps the data subchannel to an optical transmission subchannel and outputs the first I and Q modulation signals. The I and Q modulation signals modulate the light source to produce an optical transmission signal that includes wavelength components corresponding to the optical transmission subchannel.

摘要翻译： 系统，例如 对于光通信，包括I-Q调制器和传输信号处理器。 I-Q调制器被配置为响应于第一I和Q调制信号来调制第一光源。 发送信号处理器被配置为接收包括对应于第一数据子信道的数据的数据流。 处理器将数据子信道映射到光传输子信道，并输出第一I和Q调制信号。 I和Q调制信号调制光源以产生包括对应于光传输子信道的波长分量的光传输信号。

公开(公告)号：US20130156364A1

公开(公告)日：2013-06-20

申请号：US13326583

申请日：2011-12-15

申请人： Long Chen ,  Pietro Bernasconi ,  Po Dong ,  Liming Zhang ,  Young-Kai Chen

发明人： Long Chen ,  Pietro Bernasconi ,  Po Dong ,  Liming Zhang ,  Young-Kai Chen

IPC分类号： G02B6/12 ,  H01L21/02

CPC分类号： G02B6/12004 ,  G02B6/12002 ,  G02B6/1228 ,  G02F1/015 ,  H01L27/15 ,  H01S5/026 ,  H01S5/0261

摘要： A device includes a passive photonic layer located over a substrate and including at least one passive photonic element configured to propagate an optical signal therein. An electronic layer located between said substrate and said passive photonic layer includes at least one electronic device configured to propagate an electrical signal therein. An active photonic layer located over said passive photonic layer includes an active photonic device optically coupled to said passive photonic element and configured to convert between said electrical signal and said optical signal.

摘要翻译： 一种器件包括位于衬底上方的无源光子层，并且包括配置成在其中传播光信号的至少一个无源光子元件。 位于所述衬底和所述无源光子层之间的电子层包括配置成在其中传播电信号的至少一个电子器件。 位于所述无源光子层之上的有源光子层包括光学耦合到所述无源光子元件并被配置为在所述电信号和所述光信号之间转换的有源光子器件。

公开(公告)号：US07876155B2

公开(公告)日：2011-01-25

申请号：US12454326

申请日：2009-05-16

申请人： Ricardo Andres Aroca ,  Young-Kai Chen ,  Jaesik Lee

发明人： Ricardo Andres Aroca ,  Young-Kai Chen ,  Jaesik Lee

IPC分类号： H03F3/45

CPC分类号： H03F3/45475 ,  H03F3/08

摘要： An apparatus includes an electronic amplifier and an electrical feedback line, a plurality of electrical sources, and an electronic controller. The electrical feedback line connects an output of the electronic amplifier to an input thereof. The electrical sources connect to nodes on the electronic feedback line. The electronic controller is configured to adjust the electrical sources in a manner responsive to a current input to the electrical feedback line.

摘要翻译： 一种装置包括电子放大器和电反馈线，多个电源和电子控制器。 电反馈线将电子放大器的输出连接到其输入端。 电源连接到电子反馈线上的节点。 电子控制器被配置为以响应于电反馈线的电流输入的方式调整电源。

公开(公告)号：US20100289584A1

公开(公告)日：2010-11-18

申请号：US12454326

申请日：2009-05-16

申请人： Ricardo Andres Aroca ,  Young-Kai Chen ,  Jaesik Lee

发明人： Ricardo Andres Aroca ,  Young-Kai Chen ,  Jaesik Lee

IPC分类号： H03F3/45

CPC分类号： H03F3/45475 ,  H03F3/08

摘要： An apparatus includes an electronic amplifier and an electrical feedback line, a plurality of electrical sources, and an electronic controller. The electrical feedback line connects an output of the electronic amplifier to an input thereof. The electrical sources connect to nodes on the electronic feedback line. The electronic controller is configured to adjust the electrical sources in a manner responsive to a current input to the electrical feedback line.

摘要翻译： 一种装置包括电子放大器和电反馈线，多个电源和电子控制器。 电反馈线将电子放大器的输出连接到其输入端。 电源连接到电子反馈线上的节点。 电子控制器被配置为以响应于电反馈线的电流输入的方式调整电源。

公开(公告)号：US07688872B2

公开(公告)日：2010-03-30

申请号：US12050225

申请日：2008-03-18

申请人： Young-Kai Chen ,  Mahmoud Rasras ,  Kun-Yii Tu

发明人： Young-Kai Chen ,  Mahmoud Rasras ,  Kun-Yii Tu

IPC分类号： H01S3/13

CPC分类号： H01S5/0687

摘要： A self-calibrating integrated photonic circuit and a method of controlling the same. In one embodiment, the circuit includes: (1) a substrate, (2) a laser located on the substrate and configured to produce source light at an output frequency, (3) a laser alignment sensor located on the substrate and including: (3a) a reference optical resonator configured to receive the source light, have a null proximate a predetermined center frequency and provide output light as a function of a relationship between the output frequency and the center frequency and (3b) a photodetector configured to provide an electrical signal of a magnitude that is based on the output light and (4) a calibration controller located on the substrate, coupled to the photodetector and configured to adjust the output frequency based on the magnitude.

摘要翻译： 一种自校准集成光子电路及其控制方法。 在一个实施例中，电路包括：（1）衬底，（2）位于衬底上并被配置为以输出频率产生光源的激光器，（3）位于衬底上的激光对准传感器，包括：（3a ）配置为接收源光的参考光学谐振器，具有接近预定中心频率的零点，并且作为输出频率和中心频率之间的关系的函数提供输出光，以及（3b）被配置为提供电信号 基于输出光的幅度和（4）位于衬底上的校准控制器，耦合到光电检测器并且被配置为基于大小来调整输出频率。

公开(公告)号：US5977830A

公开(公告)日：1999-11-02

申请号：US974816

申请日：1997-11-20

申请人： Young-Kai Chen ,  George E. Georgiou

发明人： Young-Kai Chen ,  George E. Georgiou

IPC分类号： H01L27/02 ,  H03F1/26 ,  H03F3/16 ,  H01L27/10 ,  H03F3/08

CPC分类号： H03F1/26 ,  H01L27/0207 ,  H03F2200/294 ,  H03F2200/372

摘要： A low noise transistor IC or module comprises a plurality of conventional CMOS transistors which are laid out in parallel in such a way that the effective gate width of the combination of transistors is increased, yet the effective gate resistance and hence the noise figure (NF) of the circuit are reduced. A low noise amplifier incorporating such a module is also described.

摘要翻译： 低噪声晶体管IC或模块包括多个常规CMOS晶体管，它们并联布置，使得晶体管组合的有效栅极宽度增加，但是有效栅极电阻，因此噪声系数（NF） 的电路减少。 还描述了并入这种模块的低噪声放大器。

公开(公告)号：US5724005A

公开(公告)日：1998-03-03

申请号：US637999

申请日：1996-04-25

申请人： Young-Kai Chen ,  Jenshan Lin

发明人： Young-Kai Chen ,  Jenshan Lin

IPC分类号： H03G3/20 ,  H03F1/02 ,  H04B1/40 ,  H04B7/26 ,  H03G3/30

CPC分类号： H03F1/0261 ,  H03F2200/372

摘要： A dynamic power amplifier advantageously employed in a wireless terminal for transferring and receiving signals from a base terminal includes an input amplifier adapted to receive an input signal having a given power signal level corresponding to the distance of said wireless terminal to the terminal and adapted to provide an amplifier output signal having a given power output signal level. The dynamic amplifier further includes a power sensor configured to receive the power output signal and to generate a power indication signal corresponding to the power output signal, and a converter adapted to receive the power indication signal in order to generate a biasing signal corresponding to the power indication signal. The biasing signal is applied to the input amplifier so that the operating bias point of the power amplifier varies as a function of the power indication signal.

摘要翻译： 在无线终端中有利地用于从基站发送和接收信号的动态功率放大器包括输入放大器，其适于接收具有与所述无线终端到终端的距离相对应的给定功率信号电平的输入信号，并适于提供 具有给定功率输出信号电平的放大器输出信号。 动态放大器还包括功率传感器，其被配置为接收功率输出信号并产生对应于功率输出信号的功率指示信号，以及转换器，其适于接收功率指示信号，以产生对应于功率的偏置信号 指示信号。 偏置信号被施加到输入放大器，使得功率放大器的工作偏置点根据功率指示信号而变化。

公开(公告)号：US5213995A

公开(公告)日：1993-05-25

申请号：US869980

申请日：1992-04-16

申请人： Young-Kai Chen ,  Minghwei Hong ,  Joseph P. Mannaerts ,  Ming-Chiang Wu

发明人： Young-Kai Chen ,  Minghwei Hong ,  Joseph P. Mannaerts ,  Ming-Chiang Wu

IPC分类号： H01L21/203 ,  H01L21/20 ,  H01L33/00 ,  H01L33/06 ,  H01S5/00 ,  H01S5/20 ,  H01S5/323 ,  H01S5/343

CPC分类号： H01L33/06 ,  B82Y20/00 ,  H01L21/0245 ,  H01L21/02463 ,  H01L21/02507 ,  H01L21/02532 ,  H01L21/02546 ,  H01L33/0062 ,  H01S5/20 ,  H01S5/2004 ,  H01S5/32316 ,  H01S5/3432 ,  Y10S438/925

摘要： A novel method of making articles that comprise a periodic heteroepitaxial semiconductor structure is disclosed. The method pertains to growth of the periodic structure by MBE, CVD or similar growth techniques, and involves periodically changing the substrate temperature. For instance, a periodic multilayer GaAs/AlGaAs is grown by MBE, with the substrate temperature cycled between 600.degree. C. and 700.degree. C. The novel method can produce multilayer structures of uniformly high material quality.