公开(公告)号：US08036293B1

公开(公告)日：2011-10-11

申请号：US12322002

申请日：2009-01-28

Applicant: Chun-Sup Kim ,  Elango Pakriswamy ,  Luiz Felipe Fuks

Inventor： Chun-Sup Kim ,  Elango Pakriswamy ,  Luiz Felipe Fuks

IPC: H04K1/10 ,  H04L27/28

CPC classification number: H04B3/08 ,  H03G1/0088 ,  H04L25/0204 ,  H04L25/0264 ,  H04L25/03159 ,  H04L27/2601 ,  H04M11/062

Abstract: A transceiver having shared and discrete components forming a transmit path and a receive path configured to couple to a communication medium for establishing a multi-tone modulated communication channel thereon. The transceiver includes a line driver component on the transmit path. The line driver is configured to respond to a protocol determination and by configuring at least one of a transmit power level and a transmit bandwidth of the multi-tone modulated communication channel on the communication medium. The line driver includes a plurality of pre-amplifiers each exhibiting a combination of transmit power and bandwidth for amplification of a transmit signal modulated with a selected multi-tone modulation protocol. The line driver also includes a single output amplifier having an output coupled to the communication medium and an input switchably coupled to an output of a selected one of the plurality of pre-amplifiers in response to the protocol determination.

Abstract translation: 具有形成发送路径的共享和离散组件的收发机和被配置为耦合到通信介质以在其上建立多音调调制通信信道的接收路径。 收发器包括发送路径上的线路驱动器组件。 线路驱动器被配置为响应协议确定并且通过在通信介质上配置多音调调制通信信道的发射功率电平和发射带宽中的至少一个来配置。 线路驱动器包括多个前置放大器，每个前置放大器各自表现出发射功率和带宽的组合，用于放大以所选择的多音调制协议调制的发射信号。 线路驱动器还包括具有耦合到通信介质的输出的单个输出放大器和响应于协议确定可切换地耦合到多个前置放大器中的所选择的一个的输出的输入。

公开(公告)号：US06724219B1

公开(公告)日：2004-04-20

申请号：US09882499

申请日：2001-06-15

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

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

IPC: H04B303

CPC classification number: H04L25/0278 ,  H04L1/0001 ,  H04L25/028

Abstract: 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.

Abstract translation: 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：US06236628B1

公开(公告)日：2001-05-22

申请号：US09289987

申请日：1999-04-13

Applicant: Chun-Sup Kim

Inventor： Chun-Sup Kim

IPC: G11B700

CPC classification number: G11B7/0906 ,  G11B7/005 ,  G11B7/094 ,  G11B7/0941

Abstract: A read channel circuit of an optical disk reproducing apparatus is adapted to provide stability in servo control and reduce power consumption by revising the offset component of the circuit components after application of reference signals and then the offset component caused by pit depth resulting from signals read out in reproducing a data from an optical disk. The read channel circuit includes: a data converting section for amplifying signals input via different channels and converting them to digital data. A data reproducing section is provided for summing and waveform-equalizing the digital signals, detecting the phase difference between the waveform-equalized signals and reference sampling points, and generating a sampling clock frequency which is provided to the data converting section for compensating for the phase difference. A servo error signal detecting signal is provided for delaying the signals input from the data converting section by phases specified by the offset revision control signal and the pit depth revision control signal, summing the delayed signals into a plurality of signals, and generating the tracking error signals based on the comparison of phase differences between the summed signals.

Abstract translation: 光盘再现装置的读通道电路适用于提供伺服控制的稳定性，并且在施加参考信号之后修改电路部件的偏移分量，然后由由读出的信号导致的凹坑深度引起的偏移分量来降低功耗 在从光盘再现数据时。 读通道电路包括：数据转换部分，用于放大经由不同通道输入的信号并将其转换为数字数据。 提供数据再现部分，用于对数字信号求和和波形均衡，检测波形均衡信号和参考采样点之间的相位差，并产生提供给数据转换部分的补偿相位的采样时钟频率 区别。 提供伺服误差信号检测信号，用于将从数据转换部分输入的信号延迟由偏移修正控制信号和凹坑深度修正控制信号指定的相位，将延迟的信号加到多个信号中，并产生跟踪误差 基于相加信号之间的相位差的信号。

公开(公告)号：US08345859B2

公开(公告)日：2013-01-01

申请号：US12009196

申请日：2008-01-16

Applicant: Sam Heidari ,  Sigurd Schelstraete ,  Aner Tennen ,  Elango Pakriswamy ,  Chun-Sup Kim ,  Luiz Felipe Fuks

Inventor： Sam Heidari ,  Sigurd Schelstraete ,  Aner Tennen ,  Elango Pakriswamy ,  Chun-Sup Kim ,  Luiz Felipe Fuks

IPC: H04M1/00 ,  H04M9/00 ,  H04M7/00

CPC classification number: H04M11/062

Abstract: A XDSL line card including an allocator for allocating power to the multi-tone modulated communications on each of the subscriber lines, and for selecting control parameters sufficient to effect communications on each of the subscriber lines at a power level proximate to an allocated power level therefore. The line card also includes configurable components coupled to one another to form a transmit path and a receive path to couple to the digital subscriber lines. The configurable components are responsive to the control parameters selected by the allocator to initialize multi-tone communications over each of the plurality of subscriber lines at a power level proximate the allocated power level.

Abstract translation: 一种XDSL线路卡，包括用于为每个用户线路上的多音调调制通信分配功率的分配器，并且用于选择足以在接近分配的功率电平的功率电平上在每个用户线上进行通信的控制参数 。 线卡还包括彼此耦合的可配置组件以形成发送路径和接收到数字用户线路的接收路径。 可配置组件响应于由分配器选择的控制参数，以在接近分配的功率电平的功率电平上初始化多个用户线中的每一个上的多音通信。

公开(公告)号：US07944301B1

公开(公告)日：2011-05-17

申请号：US12799154

申请日：2010-04-20

Applicant: Chun-Sup Kim

Inventor： Chun-Sup Kim

IPC: H03F3/18

CPC classification number: H03F3/3069 ,  H03F1/307 ,  H03F1/308 ,  H03F3/3022

Abstract: An amplifier including complementary push and pull components, a bias component and a quiescent current balancer. The complementary push and pull components are serially coupled to one another between an electrical source and sink to generate an output signal at a common output terminal responsive to the input signal source. The bias component is coupled between the input signal source and the complementary push-pull components to bias the input signal to the push component and the input signal to the pull component by discrete amounts which reduce cross-over clipping exhibited in the output signal. The quiescent current balancer is coupled to the output terminal to balance quiescent currents in the push and the pull component at discrete levels which equilibrate amplification levels of the input signal generated by the push component and the pull component in the output signal at the output terminal.

Abstract translation: 放大器，包括互补的推挽元件，偏置元件和静态电流平衡器。 互补推挽元件在电源和接收器之间彼此串联耦合，以响应于输入信号源在公共输出端产生输出信号。 偏置分量耦合在输入信号源和互补推挽分量之间，以将输入信号偏压到推动分量，并将输入信号偏置到拉分量，离散量减少输出信号中所显示的交叉限幅。 静态电流平衡器耦合到输出端子，以平衡在输出端子处的输出信号中由推组件和拉分量产生的输入信号的放大电平的离散电平的推和分量中的静态电流。

公开(公告)号：US06603356B1

公开(公告)日：2003-08-05

申请号：US10047960

申请日：2002-01-14

Applicant: Chun-Sup Kim ,  Ara Bicakci ,  Sang-Soo Lee

Inventor： Chun-Sup Kim ,  Ara Bicakci ,  Sang-Soo Lee

IPC: H03F326

CPC classification number: H03F1/308 ,  H03F3/3064

Abstract: 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.

Abstract translation: 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：US06498534B1

公开(公告)日：2002-12-24

申请号：US09882497

申请日：2001-06-15

Applicant: Chun-Sup Kim ,  Sang-Soo Lee

Inventor： Chun-Sup Kim ,  Sang-Soo Lee

IPC: H03G320

CPC classification number: H03F1/025 ,  H03F1/0277 ,  H03G3/3026

Abstract: 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.

Abstract translation: 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：US06345020B1

公开(公告)日：2002-02-05

申请号：US09260020

申请日：1999-03-02

Applicant: Gea-ok Cho ,  Chun-sup Kim

Inventor： Gea-ok Cho ,  Chun-sup Kim

IPC: G11B700

CPC classification number: G11B7/0901 ,  G11B7/0943

Abstract: An apparatus and method for adaptively generating a tracking error signal according to a phase error generated due to a nonuniform depth of pits formed in an optical disk. The apparatus includes a first adder to output a first added signal (A+C) among optical detection signals A, B, C and D output by four elements for detecting light beams reflected from the optical disk, a second adder to output a second added signal (B+D) among the optical detection signals A, B, C and D, a multiplexer to receive the optical detection signals A, B, C and D, the first added signal (A+C), and the second added signal (B+D), and to select and output the signals (A+C) and (B+D), A and B, or C and D, a phase detector to determine a difference between the two signals output by the multiplexer, and output the difference as a tracking error signal and determine whether the tracking error signal is normal, and a selection controller to control selection of the multiplexer according to the result of the determination of the phase detector. Therefore, an optimal tracking error signal is obtained by selecting appropriate optical detection signals according to the phase error between the selected optical detection signals.

Abstract translation: 一种用于根据在光盘中形成的凹坑的不均匀深度而产生的相位误差自适应地生成跟踪误差信号的装置和方法。 该装置包括：第一加法器，用于输出由用于检测从光盘反射的光束的四个元件输出的光检测信号A，B，C和D中的第一相加信号（A + C）;第二加法器，输出第二加法信号 在光检测信号A，B，C和D中的信号（B + D），用于接收光检测信号A，B，C和D的多路复用器，第一相加信号（A + C）和第二相加信号 （B + D），并且选择并输出信号（A + C）和（B + D），A和B或C和D，相位检测器，以确定由多路复用器输出的两个信号之间的差异， 并输出差分作为跟踪误差信号，并确定跟踪误差信号是否正常;以及选择控制器，根据相位检测器的确定结果来控制多路复用器的选择。 因此，通过根据所选择的光学检测信号之间的相位误差来选择适当的光学检测信号来获得最佳的跟踪误差信号。

公开(公告)号：US06236898B1

公开(公告)日：2001-05-22

申请号：US09127631

申请日：1998-08-03

Applicant: Chun-Sup Kim

Inventor： Chun-Sup Kim

IPC: G05B1101

CPC classification number: G11B20/10009

Abstract: An error compensation circuit for compensating for a frequency error and a boost error of an IC chip having a filter and a boost circuit. The error compensation circuit includes a frequency compensation circuit, a boost compensation circuit, and a switch being switchable in response to a mode control signal. The frequency compensation circuit includes a first level detector to detect a level of a signal output from the filter; a first level comparator to compare an output level of the first level detector with a reference signal level; a first integrator to integrate an output of the first level comparator to generate a frequency error signal; and a first data converter and storage to convert the stored digital data into an analog frequency compensation signal in the normal signal processing mode, and provide the frequency compensation signal to the filter. The boost compensation circuit includes a second level detector to detect a level of a signal output from the boost circuit; a second level comparator to compare an output level of the second level detector with the reference signal level; a second integrator to integrate an output of the second level comparator to generate a boost error signal; and a second data converter and storage to convert the boost error signal into digital data, store the digital data, convert the stored digital data into an analog boost compensation signal in the normal signal processing mode, and provide the boost compensation signal to the boost circuit.

Abstract translation: 一种用于补偿具有滤波器和升压电路的IC芯片的频率误差和升压误差的误差补偿电路。 误差补偿电路包括频率补偿电路，升压补偿电路和可响应模式控制信号切换的开关。 频率补偿电路包括：第一电平检测器，用于检测从滤波器输出的信号的电平; 第一电平比较器，用于将第一电平检测器的输出电平与参考信号电平进行比较; 第一积分器，用于积分第一电平比较器的输出以产生频率误差信号; 以及第一数据转换器和存储器，用于在正常信号处理模式下将存储的数字数据转换成模拟频率补偿信号，并向滤波器提供频率补偿信号。 升压补偿电路包括：第二电平检测器，用于检测从升压电路输出的信号电平; 第二电平比较器，用于将第二电平检测器的输出电平与参考信号电平进行比较; 第二积分器，用于积分第二电平比较器的输出以产生升压误差信号; 以及第二数据转换器和存储器，用于将升压误差信号转换为数字数据，存储数字数据，在正常信号处理模式下将存储的数字数据转换成模拟升压补偿信号，并将升压补偿信号提供给升压电路 。

公开(公告)号：US5481313A

公开(公告)日：1996-01-02

申请号：US352105

申请日：1994-11-30

Applicant: Chun-sup Kim

Inventor： Chun-sup Kim

IPC: H04N5/455 ,  H04N9/45 ,  H04N9/455

CPC classification number: H04N9/455

Abstract: In a video processing system, a burst signal generating circuit receives a discontinuous burst signal and generates a continuous burst signal by using a phase locked loop. In the conventional video processing system, it is difficult to select a loop gain and loop bandwidth for generating a burst signal, since the performance characteristics of a phase locked loop are directly influenced by the presence of a sample and hold circuit in the phase locked loop. In order to solve this problem, in processing a digital video, a discontinuous burst signal is detected, and then during a burst signal, the phase locked loop operates by the discontinuous burst signal detected so that the continuous burst signal may be generated. When the burst signal is not present, the phase locked loop operates by a constant error value according to the continuous burst signal shifted 90 degrees in phase. Thereby, the continuous burst signal is generated.

Abstract translation: 在视频处理系统中，脉冲串信号发生电路接收不连续脉冲串信号，并通过使用锁相环产生连续脉冲信号。 在传统的视频处理系统中，由于锁相环的性能特性直接受锁相环中的采样和保持电路的影响而难以选择用于产生突发信号的环路增益和环路带宽 。 为了解决这个问题，在处理数字视频时，检测到不连续的脉冲串信号，然后在脉冲串信号期间，锁相环由检测到的不连续脉冲串信号进行操作，使得可以产生连续的脉冲串信号。 当脉冲串信号不存在时，锁相环根据相位偏移90度的连续脉冲信号而工作恒定的误差值。 从而，产生连续脉冲串信号。