公开(公告)号：US07868648B2

公开(公告)日：2011-01-11

申请号：US12071848

申请日：2008-02-27

Applicant: Dong-jin Lee ,  Jin-hyung Cho

Inventor： Dong-jin Lee ,  Jin-hyung Cho

IPC: H03K17/16 ,  H03K19/003

CPC classification number: G11C7/22 ,  G11C7/1048 ,  G11C7/1078 ,  G11C7/109 ,  G11C7/222 ,  H03K19/0005

Abstract: An on-die termination (ODT) circuit may include an ODT synchronous buffer and/or an ODT gate. The ODT synchronous buffer may be configured to generate a synchronous ODT command from an external ODT command in synchronization with a first clock signal delay-locked to an external clock signal. The ODT gate may be configured to generate signals for controlling ODT based on a second clock signal delay-locked to the external clock signal and the synchronous ODT command. The synchronous ODT command may be generated in a disabled period of the second clock signal.

Abstract translation: 片上终端（ODT）电路可以包括ODT同步缓冲器和/或ODT门。 ODT同步缓冲器可以被配置为与延迟锁定到外部时钟信号的第一时钟信号同步地从外部ODT命令生成同步ODT命令。 ODT门可以被配置为基于延迟锁定到外部时钟信号和同步ODT命令的第二时钟信号来产生用于控制ODT的信号。 可以在第二时钟信号的禁用时段中生成同步ODT命令。

公开(公告)号：US07385895B2

公开(公告)日：2008-06-10

申请号：US10859471

申请日：2004-06-03

Applicant: Yong-seock Yoon ,  Byoung-ho Choi ,  Soo-yul Jung ,  Joong-Eon Seo ,  Dong-jin Lee

Inventor： Yong-seock Yoon ,  Byoung-ho Choi ,  Soo-yul Jung ,  Joong-Eon Seo ,  Dong-jin Lee

IPC: G11B27/36 ,  G11B7/00

CPC classification number: G11B19/12

Abstract: A method of discriminating an optical disc type and an apparatus thereof. The method for an optical disc system of recording and/or reproducing an optical disc that includes an optical pickup having a laser diode, an object lens, and a light receiving device, checks a track error signal while moving the object lens to upward/downward, and discriminates an optical disc type by using the magnitude of the checked track error signal. The method and apparatus discriminate the disc type in the initial stage of focusing where the object lens moves to upward/downward.

Abstract translation: 鉴别光盘类型的方法及其装置。 用于记录和/或再现光盘的光盘系统的方法包括具有激光二极管，物镜和光接收装置的光学拾取器，在将物镜向上/向下移动的同时检查轨道误差信号 并且通过使用所检查的轨道误差信号的幅度来鉴别光盘类型。 该方法和装置在物镜向上/向下移动的聚焦的初始阶段中区分光盘类型。

公开(公告)号：US06906986B2

公开(公告)日：2005-06-14

申请号：US10230373

申请日：2002-08-29

Applicant: Moon-noh Lee ,  Won Kim ,  Sung-ro Go ,  Dong-jin Lee ,  Hyun-seok Yang ,  Hong-gul Jun

Inventor： Moon-noh Lee ,  Won Kim ,  Sung-ro Go ,  Dong-jin Lee ,  Hyun-seok Yang ,  Hong-gul Jun

IPC: G11B7/09 ,  G01H1/00 ,  G11B7/00 ,  G11B7/095 ,  G11B19/02 ,  G11B20/18

CPC classification number: G11B7/0946 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0948 ,  G11B7/0953

Abstract: A vibration quantity measuring apparatus and method, and a loop design method in which a vibration quantity generated in a focus and tracking loop is accurately measured to optimally design a focus and tracking loop of an optical disc drive. The vibration quantity measuring apparatus includes an error gain adjusting unit which adjusts an amplitude of a focus and tracking error which occurs where a disc rotates, so as to maintain the amplitude of the focus and tracking error constant, a loop gain adjusting unit which compares a closed loop phase of a focus and tracking loop and a predetermined reference closed loop phase, and maintains a constant gain of the focus and tracking loop to compensate for a gain difference of an actuator, and a measuring unit which calculates and outputs a vibration quantity using an error adjusted by the error gain adjusting unit and the loop gain adjusting unit, and an output of a controller which controls a focus and tracking of the disc. According to the methods and apparatus, a focus and tracking vibration quantity that occur differently depending on the type of a disc, on which data is recorded on or read from, or depending on a speed factor of a disc drive, can be measured.

Abstract translation: 振动量测量装置和方法以及循环设计方法，其中精确地测量在聚焦和跟踪环路中产生的振动量，以最佳地设计光盘驱动器的聚焦和跟踪环路。 振动量测量装置包括：误差增益调整单元，其调整盘旋转时发生的聚焦和跟踪误差的幅度，以保持聚焦和跟踪误差的幅度恒定;环路增益调整单元， 聚焦跟踪环和预定的参考闭环相位的闭环相位，并且保持焦距和跟踪环路的恒定增益以补偿致动器的增益差;以及测量单元，其计算并输出使用 由误差增益调整单元和环路增益调整单元调整的误差以及控制盘的聚焦和跟踪的控制器的输出。 根据方法和装置，可以测量根据盘的类型而不同地产生的聚焦和跟踪振动量，其中数据被记录在其上或从其读取或取决于盘驱动器的速度因子。

公开(公告)号：USD477993S1

公开(公告)日：2003-08-05

申请号：US29154101

申请日：2002-01-18

Applicant: Dong-jin Lee

Designer： Dong-jin Lee