公开(公告)号：US20070164886A1

公开(公告)日：2007-07-19

申请号：US11652553

申请日：2007-01-12

申请人： Je-Kook Kim ,  Jun-Ho Huh ,  Sang-Hoon Moon

发明人： Je-Kook Kim ,  Jun-Ho Huh ,  Sang-Hoon Moon

IPC分类号： H03M1/66

CPC分类号： H03M1/48 ,  G01R19/255 ,  H03M1/50

摘要： An analog level meter and a method of measuring an analog signal level may be provided. The analog level meter may include a comparator, a duty counter, an analog level detector and/or a digital to analog converter (DAC). The comparator may compare a voltage level of the analog signal with a reference voltage and generate an up-down signal. The duty counter may count a duty value of the up-down signal. The analog level detector may output a duty error value obtained by subtracting a target duty value from the duty value of the up-down signal. The analog level meter may output the reference voltage as a measured value of the analog signal when the duty error value is a desired or predetermined value.

摘要翻译： 可以提供模拟电平表和测量模拟信号电平的方法。 模拟电平表可以包括比较器，占空计数器，模拟电平检测器和/或数模转换器（DAC）。 比较器可以将模拟信号的电压电平与参考电压进行比较，并产生上拉信号。 占空比计数器可以计数上行信号的占空比值。 模拟电平检测器可以通过从上下信号的占空比值中减去目标占空比值而输出占空比误差值。 当占空比误差值为期望值或预定值时，模拟量表可输出参考电压作为模拟信号的测量值。

公开(公告)号：US20070025216A1

公开(公告)日：2007-02-01

申请号：US11492804

申请日：2006-07-26

申请人： Je-kook Kim ,  Jun-ho Huh ,  Sang-hoon Moon

发明人： Je-kook Kim ,  Jun-ho Huh ,  Sang-hoon Moon

IPC分类号： G11B7/00

CPC分类号： G11B7/0906

摘要： An apparatus and method for digitally detecting a tracking error signal using multiple phase clocks. The apparatus includes a phase extractor receiving four divided outputs in response to light reflected from an optical disk and extracting four divided phases, respectively, a phase difference detector detecting phase differences between two phases among the four divided phases, a multiple phase clock generator generating a plurality of phase clocks in response to a predetermined clock signal, a phase error detector counting phase differences in response to each of the plurality of phase clocks, summing the counted phase differences, and detecting a phase error, and a tracking error output unit detecting the tracking error signal in response to the phase error and outputting the detected tracking error signal.

摘要翻译： 一种用于使用多个相位时钟数字检测跟踪误差信号的装置和方法。 该装置包括：相位提取器，响应于从光盘反射的光分别接收四个分割的输出，并分别提取四个分相;相位差检测器，检测四个分相中的两相之间的相位差;多相时钟发生器， 响应于预定时钟信号的多个相位时钟;相位误差检测器，计数响应于所述多个相位时钟中的每一个相位差的相位差，对所计数的相位差求和，并检测相位误差;以及跟踪误差输出单元， 跟踪误差信号，并输出检测到的跟踪误差信号。

公开(公告)号：US20070025202A1

公开(公告)日：2007-02-01

申请号：US11491253

申请日：2006-07-24

申请人： Jun-ho Huh ,  Je-kook Kim ,  Sang-hoon Moon

发明人： Jun-ho Huh ,  Je-kook Kim ,  Sang-hoon Moon

IPC分类号： G11B7/00

CPC分类号： G11B7/0053 ,  G11B7/24082 ,  G11B20/12 ,  G11B27/24 ,  G11B2220/2541

摘要： An apparatus for and a method of detecting a wobble signal in accordance with a time shift includes comparing a basic wobble signal with reference levels to detect pulses representing the time shift in an analog fashion, and digitally determining a code value for the basic wobble signal on the basis of the widths of the pulses using a channel clock signal and a wobble clock signal. The determined code value is accumulated and serves as a basis on which final wobble data is produced.

摘要翻译： 根据时移检测摆动信号的装置和方法包括将基本摆动信号与参考电平进行比较，以检测以模拟方式表示时移的脉冲，以及数字确定基本摆动信号的码值 使用信道时钟信号和摆动时钟信号的脉冲宽度的基础。 所确定的代码值被累积并且用作产生最终摆动数据的基础。

公开(公告)号：US06879549B2

公开(公告)日：2005-04-12

申请号：US10226919

申请日：2002-08-23

申请人： Je-kook Kim ,  Young-wook Jang

发明人： Je-kook Kim ,  Young-wook Jang

IPC分类号： G11B7/085 ,  B60Q1/44 ,  G11B7/00 ,  G11B7/08 ,  G11B19/22 ,  G11B21/08

CPC分类号： G11B7/08517

摘要： A brake signal generating circuit and method for improving the efficiency of a lens brake in an optical disc reproducing system are provided. The brake signal generating circuit includes: a brake signal generator which receives a mirror signal that detects the track movement of a main beam and generates a first brake signal or a second brake signal for selecting predetermined operation mode signals in response to a first brake selection signal; a first operation mode generator which generates a processing value of the gain and phase of a tracking error as a first operation mode signal in response to a predetermined first control signal; a second operation mode generator which generates a correction value of a tracking loop offset as a second operation mode signal in response to a second control signal; a third operation mode generator which generates a value obtained by multiplying a value of the first operation mode signal by a predetermined value K1, where K1 is a non-zero real number, as a third operation mode signal; a fourth operation mode generator which generates as a fourth operation mode signal a value obtained by subtracting the value of the first operation mode signal from a value of the second operation mode signal, multiplying the result of the subtraction by the predetermined value K1, and adding the value of the second operation mode signal to the product; a fifth operation mode generator which generates a predetermined reference voltage as a fifth operation mode signal; and a switch unit which outputs one of the first through fifth operation mode signals in response to the first or second brake signal and second through fourth brake selection signals. The amount of braking is inverted in accordance with the amount of error in a track deviation direction and multiplied by a gain factor to improve the brake efficiency. In addition, the settling time after a track jump is reduced, the data access can be faster, and the unstable state, for example, due to track skipping, can return to the original stable state quickly.

公开(公告)号：US06611485B2

公开(公告)日：2003-08-26

申请号：US09902311

申请日：2001-07-10

申请人： Je-Kook Kim ,  Young-Wook Jang ,  Suk-Jung Lee

发明人： Je-Kook Kim ,  Young-Wook Jang ,  Suk-Jung Lee

IPC分类号： G11B576

CPC分类号： G11B20/10009 ,  G11B7/005

摘要： In an apparatus and a method for correcting asymmetry in an optical disk reproduction system, an analog RF signal is received from an optical diode and an asymmetry-corrected signal is output as a digital EFM signal. The apparatus includes envelope detectors for detecting upper and lower envelopes of the RF signal, a level controller for controlling the level of the sum of the upper envelope and the lower envelope and for outputting signal having the controlled level, and a comparator for comparing the level of the signal output from the level controller with the level of the RF signal and for outputting the comparison result as the digital EFM signal.

公开(公告)号：US06188060B1

公开(公告)日：2001-02-13

申请号：US09286238

申请日：1999-04-05

申请人： Je-Kook Kim ,  Young-Wook Jang

发明人： Je-Kook Kim ,  Young-Wook Jang

IPC分类号： H01J4014

CPC分类号： G11B20/10314 ,  G11B7/0037 ,  G11B20/10009

摘要： An optical signal conversion apparatus in a compact disk player detects peaking in an RF signal read from a disk and compensates to reproduce a stable conversion signal, for example an EFM signal. In the optical signal conversion apparatus, a peaking prevention portion detects peaking of the RF input signal and outputs a predetermined reference voltage, if the peaking is detected, or alternately the input signal, if the peaking is not detected. A waveform processing portion extracts a high frequency component from the signal output from the peaking prevention portion, slices the extracted signal as a predetermined level, and outputs the sliced signal.

摘要翻译： 光盘播放机中的光信号转换装置检测从盘读取的RF信号中的峰值，并补偿再现稳定的转换信号，例如EFM信号。 在光信号转换装置中，如果检测到峰值，则峰值防止部分检测RF输入信号的峰值，并输出预定的参考电压，或者如果没有检测到峰值，则输出预定参考电压。 波形处理部从从峰化防止部输出的信号中提取高频分量，将所提取的信号切片为预定电平，并输出分片信号。

公开(公告)号：US07701833B2

公开(公告)日：2010-04-20

申请号：US11492766

申请日：2006-07-26

申请人： Je-kook Kim ,  Jun-ho Huh ,  Sang-hoon Moon

发明人： Je-kook Kim ,  Jun-ho Huh ,  Sang-hoon Moon

IPC分类号： G11B7/00

CPC分类号： H03G3/3036 ,  G11B20/10009 ,  G11B20/10027 ,  H03G3/3084

摘要： An automatic gain controller includes a voltage control gain amplifier amplifying input signals in response to a control voltage and producing output signals. A level detector detects peak and bottom levels of the output signals of the voltage control gain amplifier, and an analog-digital converter (ADC) converts the detected peak and bottom levels into digital signals. A peak detector detects a digital peak in response to a difference between the digital peak level and digital bottom level, and a voltage controller compares the digital peak and a reference voltage, and controls the control voltage.

摘要翻译： 自动增益控制器包括电压控制增益放大器，其响应于控制电压放大输入信号并产生输出信号。 电平检测器检测电压控制增益放大器的输出信号的峰值和最低电平，模数转换器（ADC）将检测到的峰值和底电平转换为数字信号。 峰值检测器响应于数字峰值电平和数字底部电平之间的差异检测数字峰值，并且电压控制器比较数字峰值和参考电压，并控制控制电压。

公开(公告)号：US07668052B2

公开(公告)日：2010-02-23

申请号：US11492804

申请日：2006-07-26

申请人： Je-kook Kim ,  Jun-ho Huh ,  Sang-hoon Moon

发明人： Je-kook Kim ,  Jun-ho Huh ,  Sang-hoon Moon

IPC分类号： G11B7/00

CPC分类号： G11B7/0906

摘要： An apparatus and method for digitally detecting a tracking error signal using multiple phase clocks. The apparatus includes a phase extractor receiving four divided outputs in response to light reflected from an optical disk and extracting four divided phases, respectively, a phase difference detector detecting phase differences between two phases among the four divided phases, a multiple phase clock generator generating a plurality of phase clocks in response to a predetermined clock signal, a phase error detector counting phase differences in response to each of the plurality of phase clocks, summing the counted phase differences, and detecting a phase error, and a tracking error output unit detecting the tracking error signal in response to the phase error and outputting the detected tracking error signal.

摘要翻译： 一种用于使用多个相位时钟数字检测跟踪误差信号的装置和方法。 该装置包括：相位提取器，响应于从光盘反射的光分别接收四个分割的输出，并分别提取四个分相;相位差检测器，检测四个分相中的两相之间的相位差;多相时钟发生器， 响应于预定时钟信号的多个相位时钟;相位误差检测器，计数响应于所述多个相位时钟中的每一个相位差的相位差，对所计数的相位差求和，并检测相位误差;以及跟踪误差输出单元， 跟踪误差信号，并输出检测到的跟踪误差信号。

公开(公告)号：US07616537B2

公开(公告)日：2009-11-10

申请号：US10677192

申请日：2003-10-02

申请人： Je-kook Kim ,  Suk-jung Lee ,  Young-wook Jang

发明人： Je-kook Kim ,  Suk-jung Lee ,  Young-wook Jang

IPC分类号： G11B7/095

CPC分类号： G11B7/08511

摘要： Provided are a focus search apparatus and method for performing a focus search after moving an optical pickup to a focus-on point according to a signal output from a sine wave generator so that a stable and smooth focus search is performed. In the focus search method, a sine wave is generated in response to a focus search command. The focus search is performed using an optical pickup in response to the sine wave. The optical pickup is driven in response to an amplitude of the sine wave during the focus search and in response to a filtered focus error signal during a focus servo.

摘要翻译： 提供了一种聚焦搜索装置和方法，用于根据从正弦波发生器输出的信号将光学拾取器移动到聚焦点之后进行聚焦搜索，从而进行稳定和平滑的焦点搜索。 在聚焦搜索方法中，响应于焦点搜索命令产生正弦波。 使用光学拾取器响应于正弦波执行焦点搜索。 在聚焦搜索期间响应于正弦波的幅度并且响应于聚焦伺服期间的滤波的聚焦误差信号来驱动光学拾取器。

公开(公告)号：US20060002248A1

公开(公告)日：2006-01-05

申请号：US10947114

申请日：2004-09-22

申请人： Je-Kook Kim ,  Young-Wook Jang

发明人： Je-Kook Kim ,  Young-Wook Jang

IPC分类号： G11B7/00

CPC分类号： G11B7/0945 ,  G11B7/0901 ,  G11B7/0903 ,  G11B7/094

摘要： A signal generator generates a track traversing signal, and a driver causes a pick-up to traverse across tracks of a disc in accordance with the track traversing signal. An error signal generator generates a tracking error signal from the pick-up traversing across the tracks of the disc in accordance with the track traversing signal. A parameter calculator determines a value of a calibration parameter from the tracking error signal that is generated without delay and without signal distortion from low frequency components.