公开(公告)号：US20080018370A1

公开(公告)日：2008-01-24

申请号：US11812928

申请日：2007-06-22

Applicant: Jae-wook Lee

Inventor： Jae-wook Lee

IPC: H03K5/01

CPC classification number: H04L25/03878 ,  H03K3/3565

Abstract: Example embodiments are directed to a receiver for reducing ISI of at least one data transmission channel and compensating for signal gain loss, and method thereof. A receiver may include a high pass filter and a Schmitt trigger controlled by a plurality of first control signals and a plurality of second control signals. The plurality of first control signals and the plurality of second control signals may be used to shift a first trigger voltage and a second trigger voltage of the Schmitt trigger. A method of reducing intersymbol interference and compensating for signal gain loss of a receiver connected to at least one data transmission channel is also provided.

Abstract translation: 示例性实施例涉及用于减少至少一个数据传输信道的ISI并补偿信号增益损失的接收机及其方法。 接收机可以包括高通滤波器和由多个第一控制信号和多个第二控制信号控制的施密特触发器。 多个第一控制信号和多个第二控制信号可用于移位施密特触发器的第一触发电压和第二触发电压。 还提供了一种减少符号间干扰并补偿连接到至少一个数据传输信道的接收机的信号增益损失的方法。

公开(公告)号：US07248547B2

公开(公告)日：2007-07-24

申请号：US10680154

申请日：2003-10-08

Applicant: Eun-jin Ryu ,  Jae-wook Lee

Inventor： Eun-jin Ryu ,  Jae-wook Lee

IPC: G11B7/00

CPC classification number: G11B20/18 ,  G11B7/0948

Abstract: A defect signal detecting apparatus for an optical recording/reproducing apparatus that includes a maximum value detecting unit for detecting a highest amplitude among signals input during a maximum value detection period as a maximum value, a minimum value detecting unit for detecting a lowest amplitude among signals input during a minimum value detection period as a minimum value, an asymmetry detecting unit for calculating an amount δ of asymmetry by detecting a maximum value ILmax and a minimum value ILmin of a signal IL having a maximum periodicity among the signal input, and a maximum value ISmax and a minimum value ISmin of a signal IS having a minimum periodicity among the signal input, and a defect determining unit for determining whether there is a defect in the signal input, using the maximum value, the minimum value and the amount δ of asymmetry.

Abstract translation: 一种用于光学记录/再现装置的缺陷信号检测装置，包括用于检测在最大值检测周期期间输入的信号中的最大幅度的最大值检测单元作为最大值;最小值检测单元，用于检测信号中的最低振幅 在最小值检测周期期间输入为最小值;不对称检测单元，用于通过检测最大值I最大值最大值和最小值I来计算不对称量的增量量 在信号输入中具有最大周期性的信号I L L 的最小值I SUB 在信号输入端口中具有最小周期的信号I S S S S S的最小值最小值和最小值最小值 以及缺陷确定单元，用于使用所述最大值，所述最小值和所述不对称的量值δ来确定所述信号输入中是否存在缺陷。

公开(公告)号：US20060279440A1

公开(公告)日：2006-12-14

申请号：US11406374

申请日：2006-04-19

Applicant: Hui Zhao ,  Hyun-soo Park ,  Jae-wook Lee

Inventor： Hui Zhao ,  Hyun-soo Park ,  Jae-wook Lee

IPC: H03M7/40

CPC classification number: H03L7/091 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10222 ,  G11B20/10425 ,  G11B20/14 ,  G11B2220/2541 ,  G11B2220/2579

Abstract: A frequency detector implementing a method capable of detecting a frequency error in a phase locked loop (PLL) circuit at high speed includes a run-length signal detecting unit detecting a run-length signal from a sampled radio-frequency (RF) signal in a frequency detection period, based on a predetermined distribution density of the run-length signal; a counter unit including at least one counter which counts the detected run-length signals in the frequency detection period; an edge counter controlling the frequency detection period by counting passing edges of the sampled radio-frequency signal; and a frequency error generating unit generating a frequency error in the frequency detection period, using the counting result output from the at least one counter and a predetermined reference value.

Abstract translation: 执行能够以高速检测锁相环（PLL）电路中的频率误差的方法的频率检测器包括：行程长度信号检测单元，其从一个采样的射频（RF）信号中检测游程长度信号， 频率检测周期，基于游程长度信号的预定分布密度; 计数器单元，其包括至少一个计数器，其在所述频率检测周期中对所检测的游程长度信号进行计数; 边缘计数器，通过对采样的射频信号的通过边缘进行计数来控制频率检测周期; 以及频率误差产生单元，使用从所述至少一个计数器输出的计数结果和预定的参考值，在频率检测周期中产生频率误差。

公开(公告)号：US07120104B2

公开(公告)日：2006-10-10

申请号：US10657124

申请日：2003-09-09

Applicant: Eing-seob Cho ,  Jae-wook Lee

Inventor： Eing-seob Cho ,  Jae-wook Lee

IPC: G11B7/00

CPC classification number: G11B20/10046 ,  G11B20/10009

Abstract: An equalizer and an equalizing method of optical recording/reproducing apparatus capable of enhancing equalizing performance and equalizing speed are disclosed. The equalizer includes a FF unit having a feedforward filter for removing pre-cursor from inter-symbol interference of input signal, a FB unit having a feedback filter for predicting post-cursor of the inter-symbol interference and outputting it, a first adder and a second adder for adding the signal from the FF unit and the signal from the FB unit, to remove the inter-symbol interference, a slicer for deciding the level of the signal from the first adder to be a predetermined level and feeding back the level-decided signal to the FB unit, and a signal detection unit for outputting the signal having the inter-symbol interference removed by the second adder as a predetermined signal using at least one of a trellis structure method and a tree structure method.

Abstract translation: 公开了能够提高均衡性能和均衡速度的光记录/再现装置的均衡器和均衡方法。 均衡器包括具有前馈滤波器的FF单元，用于从输入信号的符号间干扰中去除前置信号; FB单元，具有用于预测符号间干扰后序的输出的反馈滤波器，第一加法器和 第二加法器，用于将来自FF单元的信号和来自FB单元的信号相加，以消除符号间干扰;切片器，用于将来自第一加法器的信号的电平决定为预定电平，并将电平反馈 信号检测单元，用于使用网格结构方法和树结构方法中的至少一种，将具有由第二加法器去除的符号间干扰的信号作为预定信号输出。

公开(公告)号：US20060135148A1

公开(公告)日：2006-06-22

申请号：US11184416

申请日：2005-07-19

Applicant: Jae-Wook Lee ,  Gil-Haeng Lee ,  Young-Sun Kim

Inventor： Jae-Wook Lee ,  Gil-Haeng Lee ,  Young-Sun Kim

IPC: H04Q7/20

CPC classification number: H04W24/06 ,  H04L41/5038 ,  H04L43/50

Abstract: A system for measuring a communication quality and a method thereof are disclosed. The system includes: a first communication quality measuring unit for requesting a second communication quality measuring unit to transmit a test traffic, measuring a communication quality from the test traffic received from the second communication quality measuring unit as a response of the request, and controlling a generation frequency and an amount of test traffic for a next communication quality measuring stage by analyzing the measured communication quality; and the second communication quality measuring unit for generating a test traffic by controlling a generation frequency and an amount of the test traffic according to a request of the first communication quality measuring unit.

Abstract translation: 公开了一种用于测量通信质量的系统及其方法。 该系统包括：第一通信质量测量单元，用于请求第二通信质量测量单元发送测试业务;测量来自第二通信质量测量单元接收的测试业务的通信质量作为该请求的响应;以及控制一个 通过分析所测量的通信质量来进行下一个通信质量测量阶段的生成频率和测试业务量; 以及第二通信质量测量单元，用于通过根据第一通信质量测量单元的请求控制测试业务的生成频率和量来产生测试业务。

公开(公告)号：US20050264350A1

公开(公告)日：2005-12-01

申请号：US11124530

申请日：2005-05-06

Applicant: Jae-Wook Lee ,  Goog-Chun Cho

Inventor： Jae-Wook Lee ,  Goog-Chun Cho

IPC: H03K5/04 ,  H03F3/217 ,  H03F3/38 ,  H03K7/08 ,  H03M7/32

CPC classification number: H03F3/217 ,  H03F2200/331

Abstract: A class D amplifier and a method of pulse width modulation are provided. The class D amplifier includes a sigma delta modulator, a reference signal generator, a pulse width modulator and an amplifier. The sigma delta modulator converts an M bit input signal into N bit pulse code modulation data (M and N are integers and M>N). The reference signal generator counts a system clock and generates an N bit reference signal having 2N data blocks in a sampling period of the pulse code modulation data. The pulse width modulator generates a plurality of pulse width modulation signals having at least two switching periods within the sampling period of the pulse code modulation data. The pulse width modulation signals have pulse widths varied based on a unit time interval of the reference signal. The unit time interval corresponds to one of the data blocks of the reference signal.

Abstract translation: 提供D类放大器和脉冲宽度调制方法。 D类放大器包括一个Σ-Δ调制器，一个参考信号发生器，一个脉宽调制器和一个放大器。 Σ-Δ调制器将M位输入信号转换成N位脉冲码调制数据（M和N是整数，M> N）。 参考信号发生器对系统时钟进行计数，并在脉冲编码调制数据的采样周期中产生具有2个N个数据块的N位参考信号。 脉宽调制器产生在脉冲编码调制数据的采样周期内具有至少两个切换周期的多个脉宽调制信号。 脉冲宽度调制信号具有基于参考信号的单位时间间隔而变化的脉冲宽度。 单位时间间隔对应于参考信号的数据块之一。

公开(公告)号：US06954510B2

公开(公告)日：2005-10-11

申请号：US09847790

申请日：2001-05-02

Applicant: Jae-wook Lee

Inventor： Jae-wook Lee

IPC: H03L7/08 ,  H03L7/095 ,  H03D3/24 ,  H04L7/00

CPC classification number: H03L7/095

Abstract: There is provided a phase-locked loop lock detector circuit for detecting a lock or unlock state of a PLL circuit. A synchronization circuit synchronizes a lock window signal with a reference frequency signal. A rising edge detection circuit and a falling edge detection circuit output a state of an error signal at a rising edge of an output signal of the synchronization circuit and at a rising edge of an inverted lock window signal, respectively. A logic circuit performs an AND operation on outputs of the detection circuits, and outputs a signal indicating the lock or unlock state.

Abstract translation: 提供了用于检测PLL电路的锁定或解锁状态的锁相环锁定检测器电路。 同步电路将锁定窗口信号与参考频率信号同步。 上升沿检测电路和下降沿检测电路分别在同步电路的输出信号的上升沿和反相锁定窗口信号的上升沿输出误差信号的状态。 逻辑电路对检测电路的输出进行AND运算，并输出指示锁定或解锁状态的信号。

公开(公告)号：US20050093622A1

公开(公告)日：2005-05-05

申请号：US10979484

申请日：2004-11-02

Applicant: Jae-Wook Lee

Inventor： Jae-Wook Lee

IPC: H03F1/52 ,  H03F3/217 ,  H03F3/38

CPC classification number: H03F1/523 ,  H03F3/2171 ,  H03F3/2173 ,  H03F2200/351

Abstract: In a method of detecting a fault in a class D amplifier, an amplifier output signal is generated based on inverting a pulse width modulation signal corresponding to received audio data. The amplifier output signal is low pass filtered and hysteretically filtered (Schmitt Triggered). The filtered amplifier output signal is sampled (latched) using the pulse width modulation signal as a sampling (latch) clock signal, to generate a first comparison signal. The pulse width modulation signal is sampled (latched) using the filtered amplifier output signal as a sampling (latch) clock signal, to generate a second comparison signal. A fault detection signal for detecting the fault is generated by comparing the first and second comparison signals. Since the first pulse width modulation signal and the filtered amplifier output signal are robustly compared, a fault occurrence may be directly and reliably detected.

Abstract translation: 在检测D类放大器的故障的方法中，基于与接收到的音频数据相对应的脉冲宽度调制信号反相来产生放大器输出信号。 放大器输出信号是低通滤波和迟滞滤波（施密特触发）。 滤波后的放大器输出信号采用脉冲宽度调制信号作为采样（锁存）时钟信号采样（锁存），以产生第一比较信号。 使用滤波的放大器输出信号作为采样（锁存）时钟信号对脉冲宽度调制信号进行采样（锁存），以产生第二比较信号。 通过比较第一和第二比较信号来产生用于检测故障的故障检测信号。 由于第一脉冲宽度调制信号和滤波放大器输出信号被鲁棒地比较，所以可以直接可靠地检测到故障发生。

公开(公告)号：US20050078188A1

公开(公告)日：2005-04-14

申请号：US10919531

申请日：2004-08-17

Applicant: Eing-seob Cho ,  Jae-seong Shim ,  Hyun-soo Park ,  Jae-wook Lee ,  Jung-hyun Lee ,  Eun-Jin Ryu

Inventor： Eing-seob Cho ,  Jae-seong Shim ,  Hyun-soo Park ,  Jae-wook Lee ,  Jung-hyun Lee ,  Eun-Jin Ryu

IPC: G11B20/10 ,  G06F19/00 ,  H04L1/20

CPC classification number: H04L1/205

Abstract: A signal quality measuring method and apparatus in which a quality of a signal detected from an RF signal read out from a disk or a communications channel is measured by using eye pattern signals of the detected RF signals. Eye pattern signals representing time change of a waveform of the detected signal are generated and a signal quality value is generated based on an eye depth and/or an eye width measured from the eye pattern signals. A histogram of the eye pattern signals is used to identify a plurality of main level values which are used as a reference value in measuring the signal quality. Accordingly, signal characteristics in a high-density storage medium system or communication system may be accurately represented.

Abstract translation: 一种信号质量测量方法和装置，其中通过使用检测到的RF信号的眼图信号测量从从盘或通信信道读出的RF信号中检测到的信号的质量。 产生表示检测信号的波形的时间变化的眼图信号，并且基于从眼图信号测量的眼睛深度和/或眼睛宽度来生成信号质量值。 眼图信号的直方图用于识别在测量信号质量时用作参考值的多个主电平值。 因此，可以精确地表示高密度存储介质系统或通信系统中的信号特性。

公开(公告)号：US06727639B2

公开(公告)日：2004-04-27

申请号：US09855526

申请日：2001-05-16

Applicant: Jae Wook Lee

Inventor： Jae Wook Lee

IPC: H01J2980

CPC classification number: H01J29/07 ,  H01J2229/0716 ,  H01J2229/0788

Abstract: The invention relates to a flat color CRT in which the upper plate width of a frame for tensioning and fixing a shadow mask is enlarged so that the CRT is free from an influence from howling of the shadow mask and welding and productivity of the shadow mask and the frame may be simplified. The shadow mask assembly comprises a shadow mask having an effective area with slots and a non-effective area without slots in the periphery; and a frame fixing body for tensioning the shadow mask; wherein the shortest distance tM from the outermost end of a main frame welded to the shadow mask to the interface between the effective area and the non-effective area and the width tW of the mask welding part formed at the upper part of the main frame have the relation of 0.14 ≤ t W t M ≤ 1.0 .

Abstract translation: 本发明涉及一种平板彩色CRT，其中用于张紧和固定荫罩的框架的上板宽度被扩大，使得CRT不受荫罩的啸叫和阴影的焊接和生产率的影响，以及 该框架可以被简化。 荫罩组件包括具有有槽区域的有效区域和在周边没有狭槽的非有效区域的荫罩; 以及用于张紧荫罩的框架固定体; 其中从焊接到荫罩的主框架的最外端到形成在主框架的上部的掩模焊接部分的有效区域和非有效区域之间的界面以及宽度tW的最短距离tM具有 的关系