公开(公告)号：US06724219B1

公开(公告)日：2004-04-20

申请号：US09882499

申请日：2001-06-15

申请人： Chun-Sup Kim ,  Ara Bicakci ,  Cormac S. Conroy ,  Sang-Soo Lee

发明人： Chun-Sup Kim ,  Ara Bicakci ,  Cormac S. Conroy ,  Sang-Soo Lee

IPC分类号： H04B303

CPC分类号： H04L25/0278 ,  H04L1/0001 ,  H04L25/028

摘要： A line driver for coupling a data transceiver to a transmission line having a load impedance via a transformer with a turns ratio of 1:n includes an input port for receiving an input signal voltage from the data transceiver, an output port for supplying an output signal voltage to the transformer, and an amplifier circuit for amplifying the input signal voltage. The amplifier circuit includes a first output stage, a second output stage coupled to the output port, an output resistor coupled to the first output stage, a feedback path from the first output stage to an input of the amplifier circuit, and a line matching network coupled between the first output stage and the second output stage, for compensating variations in the load impedance, so that a synthesized output impedance of the line driver substantially matches an actual load impedance Z of the transmission line.

摘要翻译： 用于将数据收发器耦合到具有匝数比为1：n的变压器的具有负载阻抗的传输线的线路驱动器包括用于从数据收发器接收输入信号电压的输入端口，用于提供输出信号的输出端口 变压器的电压和用于放大输入信号电压的放大器电路。 放大器电路包括第一输出级，耦合到输出端的第二输出级，耦合到第一输出级的输出电阻，从第一输出级到放大器电路的输入的反馈路径，以及线匹配网络 耦合在第一输出级和第二输出级之间，用于补偿负载阻抗的变化，使得线路驱动器的合成输出阻抗基本上与传输线的实际负载阻抗Z匹配。

公开(公告)号：US06870928B1

公开(公告)日：2005-03-22

申请号：US09866525

申请日：2001-05-25

申请人： Cormac S. Conroy ,  Samuel W. Sheng ,  Ara Bicakci ,  John DeCelles ,  Sang-Soo Lee

发明人： Cormac S. Conroy ,  Samuel W. Sheng ,  Ara Bicakci ,  John DeCelles ,  Sang-Soo Lee

IPC分类号： H04L25/02 ,  H04L27/00 ,  H04M1/738 ,  H04M11/06 ,  H04M1/00

CPC分类号： H04L27/0002 ,  H04L25/0266 ,  H04M1/738 ,  H04M11/062

摘要： A line interface couples signals between a data transceiver and a transmission line having a load impedance Z. The line interface includes a transformer, a driver circuit for supplying a transmit signal from the data transceiver to the transformer, and a receiver circuit for receiving a receive signal from the transformer. The transformer includes a first port coupled to the transmission line, a second port coupled to the driver circuit, a third port coupled to the receiver circuit, a first winding part having a turns ratio of 1: n, where n>1, for coupling the transmit signal from the second port to the first port, and a second winding part having a turns ratio of 1: m, where m

摘要翻译： 线路接口在数据收发器和具有负载阻抗Z的传输线之间耦合信号。线路接口包括变压器，用于从数据收发器向变压器提供发送信号的驱动器电路，以及用于接收接收器的接收器电路 来自变压器的信号。 变压器包括耦合到传输线的第一端口，耦合到驱动器电路的第二端口，耦合到接收器电路的第三端口，具有匝数比为1：n的第一绕组部件，其中n> 1，用于耦合 从第二端口到第一端口的发送信号和匝数比为1：m的第二绕组部分，其中m

公开(公告)号：US06498521B1

公开(公告)日：2002-12-24

申请号：US09998671

申请日：2001-11-29

申请人： Ara Bicakci ,  Sang-Soo Lee ,  Cormac S. Conroy

发明人： Ara Bicakci ,  Sang-Soo Lee ,  Cormac S. Conroy

IPC分类号： H03B100

CPC分类号： H04L25/0266

摘要： A dynamic supply control circuit is provided for a line driver. The line driver has an amplification factor G, receives an input signal voltage, and drives a transmission line having a load RL via a transformer having a turns ratio of 1:n. The circuit includes an input node for receiving an input signal voltage, a supply node for supplying a driving voltage to the line driver, a lift diode coupled between a fixed supply voltage and the supply node, a lift capacitor coupled between the supply node and an output node, and a lift amplifier having the amplification factor G coupled between the input node and the output node. The lift amplifier drives the lift capacitor when the input signal voltage is greater than an input threshold voltage, the input threshold voltage having a value greater than a common mode voltage of the input signal voltage.

摘要翻译： 为线路驱动器提供动态电源控制电路。 线路驱动器具有放大系数G，接收输入信号电压，并通过匝数比为1：n的变压器驱动具有负载RL的传输线。 电路包括用于接收输入信号电压的输入节点，用于向线路驱动器提供驱动电压的电源节点，耦合在固定电源电压和电源节点之间的升压二极管，耦合在电源节点和 输出节点和具有耦合在输入节点和输出节点之间的放大因子G的升降放大器。 当输入信号电压大于输入阈值电压时，升降放大器驱动提升电容器，输入阈值电压具有大于输入信号电压的共模电压的值。

公开(公告)号：US06603356B1

公开(公告)日：2003-08-05

申请号：US10047960

申请日：2002-01-14

申请人： Chun-Sup Kim ,  Ara Bicakci ,  Sang-Soo Lee

发明人： Chun-Sup Kim ,  Ara Bicakci ,  Sang-Soo Lee

IPC分类号： H03F326

CPC分类号： H03F1/308 ,  H03F3/3064

摘要： A method and circuit control a quiescent current of an amplifier including a preamplifier, error amplifiers, and output devices driven by the error amplifiers, the error amplifiers having an input-referred offset voltage. The method includes (a) applying a calibration voltage to an input of the error amplifiers, (b) calibrating a quiescent current of the output devices by changing the calibration voltage so that the calibrated quiescent current has a predetermined current value, the calibration voltage corresponding to the calibrated quiescent current being set as a correction voltage, and (c) operating the amplifier with the correction voltage applied to the input of the error amplifiers. The circuit includes a correction voltage generator supplying a correction voltage to the error amplifier input, a quiescent current detector detecting the quiescent current, and a calibration circuit adjusting the correction voltage so that the quiescent current is calibrated to a predetermined current value.

摘要翻译： 一种方法和电路控制包括由误差放大器驱动的前置放大器，误差放大器和输出装置的放大器的静态电流，误差放大器具有输入参考偏移电压。 该方法包括（a）将校准电压施加到误差放大器的输入端，（b）通过改变校准电压来校准输出装置的静态电流，使得校准的静态电流具有预定的电流值，校准电压对应 将校正的静态电流设置为校正电压，以及（c）使用施加到误差放大器的输入的校正电压来操作放大器。 该电路包括校正电压发生器，其向误差放大器输入端提供校正电压，静态电流检测器检测静态电流;校准电路调节校正电压，使得静态电流被校准到预定电流值。

公开(公告)号：US07020277B1

公开(公告)日：2006-03-28

申请号：US10011153

申请日：2001-12-05

申请人： Sang-Soo Lee ,  Samuel W. Sheng ,  Cormac S. Conroy

发明人： Sang-Soo Lee ,  Samuel W. Sheng ,  Cormac S. Conroy

IPC分类号： H04B1/52

CPC分类号： H04L25/0266

摘要： A line interface couples a data transceiver to a transmission line via a transformer, the data transceiver transmitting signals in a first frequency range and receiving signals in a second frequency range. The line interface includes an input port for receiving an input signal voltage from an analog front end (AFE) chip, an output port, a line driver for amplifying the input signal voltage and supplying a transmit signal to the output port, a line port for sending the transmit signal and receiving a receive signal, termination resistors coupled between the output port and the line port, a receive signal port for supplying the receive signal to the AFE chip, a receive amplifier formed on the AFE chip coupled to the receive signal port, and a bridge network resistively coupling the line port and the output port to the receive signal port, the bridge network having a low-pass filter characteristic.

摘要翻译： 线路接口通过变压器将数据收发器耦合到传输线，数据收发器在第一频率范围内传输信号并在第二频率范围内接收信号。 线路接口包括用于从模拟前端（AFE）芯片接收输入信号电压的输入端口，输出端口，用于放大输入信号电压并向输出端口提供发送信号的线路驱动器，用于 发送发送信号并接收接收信号，耦合在输出端口和线路端口之间的终端电阻器，用于将接收信号提供给AFE芯片的接收信号端口，耦合到接收信号端口的AFE芯片上形成的接收放大器 ，桥接网络将线路端口和输出端口电阻地耦合到接收信号端口，桥接网络具有低通滤波器特性。

公开(公告)号：US06498534B1

公开(公告)日：2002-12-24

申请号：US09882497

申请日：2001-06-15

申请人： Chun-Sup Kim ,  Sang-Soo Lee

发明人： Chun-Sup Kim ,  Sang-Soo Lee

IPC分类号： H03G320

CPC分类号： H03F1/025 ,  H03F1/0277 ,  H03G3/3026

摘要： A variable-gain amplifier circuit includes an input port, an output port, and first and second amplifiers coupled therebetween. The first amplifier includes a first amplifier path having a first amplification factor, effective when the input signal has a voltage level in a first range, and a second amplifier path having a second amplification factor greater than the first amplification factor, effective when the input signal has a voltage level in a second range including voltages of a first polarity greater than that in the first range. The second amplifier includes a third amplifier path having the first amplification factor, effective when the input signal has a voltage level in a third range, and a fourth amplifier path having the second amplification factor, effective when the input signal has a voltage level in a fourth range including voltages of a second polarity greater than that in the third range.

摘要翻译： 可变增益放大器电路包括输入端口，输出端口以及耦合在其间的第一和第二放大器。 第一放大器包括具有第一放大因子的第一放大器路径，当输入信号具有在第一范围内的电压电平时有效;以及第二放大器路径，具有大于第一放大因子的第二放大系数，当输入信号 具有包括第一极性大于第一范围的电压的第二范围内的电压电平。 第二放大器包括具有第一放大因子的第三放大器路径，当输入信号具有第三范围内的电压电平时有效;以及第四放大器路径，具有第二放大因子，当输入信号具有第 第四范围包括大于第三范围的第二极性的电压。

公开(公告)号：US20140079401A1

公开(公告)日：2014-03-20

申请号：US14118922

申请日：2012-05-25

申请人： Han-Hyub Lee ,  Jie-Hyun Lee ,  Eon-Sang Kim ,  Sang-Soo Lee

发明人： Han-Hyub Lee ,  Jie-Hyun Lee ,  Eon-Sang Kim ,  Sang-Soo Lee

IPC分类号： H04B10/079 ,  H04J14/02

CPC分类号： H04J14/0242 ,  H04B10/0795 ,  H04B10/2587 ,  H04J14/02 ,  H04J2014/0253

摘要： A wavelength-division multiplexing optical communication system and a method for measuring optical performance of an output signal for the system. The optical communication system includes: a service-provider device; a local node; and a plurality of subscriber devices. The service-provider device includes: a plurality of first optical transceivers; a first optical multiplexer/demultiplexer (OD/OM) connected to the plurality of first optical transceivers; and a seed-light source providing seed light. Each subscriber device includes a second optical transceiver. The local node connects the service-provider device and the plurality of subscriber devices to each other using a DWDM link comprising: a second multiplexer/demultiplexer (OD/OM); and a single-mode optical fiber for transmission. Here, the optical intensity of an output signal of the second optical transceiver is determined by compensating for the value of the loss caused when the output signal passes through the second OD/OM of the local node.

摘要翻译： 一种波分复用光通信系统和用于测量该系统的输出信号的光学性能的方法。 光通信系统包括：服务提供者设备; 一个本地节点; 和多个订户设备。 服务提供者设备包括：多个第一光收发器; 连接到所述多个第一光收发器的第一光复用器/解复用器（OD / OM）; 和提供种子光的种子光源。 每个用户设备包括第二光收发器。 本地节点使用DWDM链路将服务提供商设备和多个用户设备彼此连接，包括：第二多路复用器/解复用器（OD / OM）; 和用于传输的单模光纤。 这里，通过补偿当输出信号通过本地节点的第二OD / OM时引起的损耗的值来确定第二光收发器的输出信号的光强度。

公开(公告)号：US08243223B2

公开(公告)日：2012-08-14

申请号：US12649892

申请日：2009-12-30

申请人： Sang-Soo Lee

发明人： Sang-Soo Lee

IPC分类号： G02F1/1333

CPC分类号： G02F1/133308

摘要： A liquid crystal display device includes a liquid crystal panel; a backlight unit disposed under the liquid crystal panel and including a light source and an optical sheet, the optical sheet including a protrusion extending from two opposite sides; and a bottom frame under the backlight unit and including a counter part, the counter part including an opening such that the protrusion is inserted into the opening.

摘要翻译： 液晶显示装置包括液晶面板; 设置在所述液晶面板的下方并包括光源和光学片的背光单元，所述光学片包括从两个相对侧延伸的突出部; 以及在所述背光单元下方的底框，并且包括对置部，所述对置部包括开口，使得所述突起插入所述开口中。

公开(公告)号：US20120163819A1

公开(公告)日：2012-06-28

申请号：US13334108

申请日：2011-12-22

申请人： Sil-Gu MUN ,  Eui-Suk Jung ,  Sang-Soo Lee

发明人： Sil-Gu MUN ,  Eui-Suk Jung ,  Sang-Soo Lee

IPC分类号： H04J14/00

CPC分类号： H04J14/0282 ,  H04B10/25753 ,  H04J14/0257 ,  H04W88/08

摘要： A data transmission apparatus for use in a separate-type base station is provided. The data transmission apparatus includes: a digital unit configured to generate first data that includes transmission method information indicating a selected transmission method and data to be transmitted; a time-division synchronization control unit configured to, in response to the selected transmission method being time-division multiplexing (TDM), generate second data by including synchronization information for transmitting the first data using TDM in the first data; and a wavelength conversion unit configured to convert at least one of the first data and the second data into one or more wavelength optical signals using a predefined wavelength or a predefined group of wavelengths and transmit the wavelength optical signals to one or more radio stations.

摘要翻译： 提供了一种用于分离式基站中的数据传输装置。 数据发送装置包括：数字单元，被配置为生成包括指示所选择的发送方法和要发送的数据的发送方法信息的第一数据; 时分同步控制单元，被配置为响应于所选择的传输方法是时分复用（TDM），通过在第一数据中包括使用TDM发送第一数据的同步信息来生成第二数据; 以及波长转换单元，被配置为使用预定波长或预定波长组将所述第一数据和所述第二数据中的至少一个转换成一个或多个波长光信号，并将所述波长光信号发射到一个或多个无线电台。

公开(公告)号：US20050141582A1

公开(公告)日：2005-06-30

申请号：US10880766

申请日：2004-06-28

申请人： Sang-Soo Lee ,  Heuk Park ,  Hyunwoo Cho ,  Sang-Kyu Lim ,  Je-Soo Ko

发明人： Sang-Soo Lee ,  Heuk Park ,  Hyunwoo Cho ,  Sang-Kyu Lim ,  Je-Soo Ko

IPC分类号： H04B10/04 ,  G02F2/00 ,  H01S3/067 ,  H01S3/097 ,  H01S3/30 ,  H03D9/00 ,  H04B10/145

CPC分类号： H01S3/302 ,  G02F2/002 ,  H01S3/067 ,  H03D9/00 ,  H04B10/50

摘要： An apparatus and a method for generating an optical carrier is disclosed. The apparatus includes: a light source generating a pump light; a SBS generator for stimulated Brillouin scattering the pump light to generate a stokes light from the light source; an attenuator for controlling an amplitude of the pump light from the light source to generate an amplitude controlled pump light; and a detector for heterodyne beating the stokes light and the amplitude controlled pump light to generate an optical carrier.

摘要翻译： 公开了一种用于产生光学载体的装置和方法。 该装置包括：产生泵浦光的光源; 用于受激布里渊的SBS发生器将泵浦光散射以产生来自光源的斯托克斯光; 衰减器，用于控制来自光源的泵浦光的振幅，以产生振幅控制的泵浦光; 以及用于外差打击斯托克斯光和振幅控制的泵浦光的检测器，以产生光学载体。