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39 条记录 (耗时 0.024 秒)

    Differential phase detection device and tracking error signal detection apparatus using the same
    33.
    发明授权
    Differential phase detection device and tracking error signal detection apparatus using the same 失效
    差分相位检测装置和跟踪误差信号检测装置使用相同

    公开(公告)号：US06977982B2

    公开(公告)日：2005-12-20

    申请号：US09986978

    申请日：2001-11-13

    申请人： Byung-in Ma ,  In-sik Park ,  Joong-eon Seo ,  Sung-ro Go ,  Soo-yul Jung ,  Chang-jin Yang

    发明人： Byung-in Ma ,  In-sik Park ,  Joong-eon Seo ,  Sung-ro Go ,  Soo-yul Jung ,  Chang-jin Yang

    IPC分类号： G11B7/08 ,  G11B7/09 ,  H04L7/00 ,  G11B7/00

    CPC分类号： G11B7/0906 ,  G11B7/094

    摘要： A differential phase detection device receives first through fourth detection signals from a photodetector and detects a differential phase signal therefrom, the differential phase detection device includes a slicer slicing and digitizing each of the detection signals with respect to a reference level. A synthesizer synthesizes the digitized detection signals and generates therefrom synthesis signals. A phase difference detector compares phases of the synthesis signals and outputs a first phase difference signal and a second phase difference signal. A matrix circuit processes the first and second phase difference signals to output the differential phase signal.

    摘要翻译： 差分相位检测装置从光电检测器接收第一至第四检测信号，并从其检测差分相位信号，差分相位检测装置包括切片器，对每个检测信号相对于基准电平进行数字化。 合成器合成数字化的检测信号并从中产生合成信号。 相位差检测器对合成信号的相位进行比较，并输出第一相位差信号和第二相位差信号。 矩阵电路处理第一和第二相位差信号以输出差分相位信号。

    Digital magnetic recording/reproducing amplifying apparatus
    34.
    发明授权
    Digital magnetic recording/reproducing amplifying apparatus 失效
    数字磁记录/再现放大装置

    公开(公告)号：US5208709A

    公开(公告)日：1993-05-04

    申请号：US670037

    申请日：1991-03-15

    申请人： Chang-jin Yang

    发明人： Chang-jin Yang

    IPC分类号： G11B15/12

    CPC分类号： G11B15/125

    摘要： A digital magnetic recording/reproducing amplifying apparatus which includes a recording amplifying portion, a first reproducing amplifying portion, a switching portion, and a second reproducing amplifying portion. The apparatus has the advantage of uniform performance by a more simply defined recording current waveform with variable resistance and by performing a two-stage amplification while simultaneously reducing the number of amplifiers by half.

    摘要翻译： 一种数字磁记录/再现放大装置，包括记录放大部分，第一再现放大部分，开关部分和第二再现放大部分。 该装置具有通过具有可变电阻的更简单定义的记录电流波形并且通过执行两级放大同时将放大器数量减少一半而具有均匀性能的优点。

    Circuit and method for detecting mirror signal for optical disc apparatus
    35.
    发明授权
    Circuit and method for detecting mirror signal for optical disc apparatus 失效
    光盘装置检测镜像信号的电路及方法

    公开(公告)号：US06967906B2

    公开(公告)日：2005-11-22

    申请号：US10439310

    申请日：2003-05-16

    申请人： Sang-yeal Park ,  Chang-jin Yang

    发明人： Sang-yeal Park ,  Chang-jin Yang

    IPC分类号： G11B7/005 ,  G11B7/085 ,  G11B19/02 ,  G11B21/08

    CPC分类号： G11B7/08541 ,  G11B7/08529

    摘要： A circuit and a method of detecting a mirror signal for an optical disc apparatus, the method includes detecting a bottom envelope from a radio frequency signal and providing a bottom envelope signal thereof, amplifying the bottom envelope signal according to a center level of the bottom envelope signal, and comparing the amplified bottom envelope signal with a predetermined comparison voltage to detect the mirror signal.

    摘要翻译： 一种用于检测光盘装置的镜像信号的电路和方法，所述方法包括从射频信号检测底包络并提供其底包络信号，根据底包络线的中心电平放大底包络信号 信号，并且将放大的底包络信号与预定的比较电压进行比较以检测镜像信号。

    Optical pickup apparatus and optimal light spot focusing method
    37.
    发明授权
    Optical pickup apparatus and optimal light spot focusing method 有权
    光拾取装置和最佳光点聚焦法

    公开(公告)号：US07280458B2

    公开(公告)日：2007-10-09

    申请号：US10120786

    申请日：2002-04-12

    申请人： Yong-jae Lee ,  Sung-ro Go ,  Pyong-yong Seong ,  Chang-jin Yang ,  Gi-bong Song ,  Byung-in Ma ,  Jong-koog Lee

    发明人： Yong-jae Lee ,  Sung-ro Go ,  Pyong-yong Seong ,  Chang-jin Yang ,  Gi-bong Song ,  Byung-in Ma ,  Jong-koog Lee

    IPC分类号： G11B7/95

    CPC分类号： G11B7/131 ,  G11B7/00718 ,  G11B7/094 ,  G11B7/0941 ,  G11B7/0943 ,  G11B7/0946 ,  G11B7/0956 ,  G11B7/1275 ,  G11B7/1353 ,  G11B7/1367 ,  G11B7/139 ,  G11B7/13922 ,  G11B2007/0006

    摘要： An optical pickup apparatus includes a first light source to emit a first light beam having a predetermined wavelength, a first optical path changer to change a proceeding path of the first light beam, an objective lens to focus the first light beam on a recording medium, a diffraction member to divide the first light beam reflected by the recording medium into five light regions, the diffraction member having a first diffraction region having a wide width in a direction corresponding to a tangential direction of the recording medium and second through fifth diffraction regions sequentially arranged around the outside of the first diffraction region in a direction corresponding to a radial direction of the recording medium, and a first photodetector having first through fifth light receiving portions to receive the first light beam reflected by the recording medium.

    摘要翻译： 一种光拾取装置包括：发射具有预定波长的第一光束的第一光源;改变第一光束的行进路径的第一光路改变器;将第一光束聚焦在记录介质上的物镜; 衍射构件，用于将由记录介质反射的第一光束分成五个光区域，衍射构件具有在与记录介质的切线方向对应的方向上具有宽宽度的第一衍射区域和第二至第五衍射区域 在与所述记录介质的径向对应的方向上围绕所述第一衍射区域的外侧布置;以及第一光电检测器，具有第一至第五光接收部分，以接收由所述记录介质反射的所述第一光束。

    Optical reproducing apparatus and method with automatic gain control
    38.
    发明申请
    Optical reproducing apparatus and method with automatic gain control 审中-公开
    具有自动增益控制的光学再现装置和方法

    公开(公告)号：US20050201253A1

    公开(公告)日：2005-09-15

    申请号：US11073610

    申请日：2005-03-08

    申请人： Chang-jin Yang ,  Sang-yeal Park ,  Young-im Joo ,  You-chan Woun

    发明人： Chang-jin Yang ,  Sang-yeal Park ,  Young-im Joo ,  You-chan Woun

    IPC分类号： G11B7/004 ,  G11B7/00 ,  G11B7/005

    CPC分类号： G11B7/005 ,  G11B20/10009 ,  G11B20/10027 ,  G11B20/10481 ,  G11B20/1833 ,  G11B2220/2537

    摘要： An optical reproducing apparatus and method, with an automatic gain control therefor. The optical reproducing apparatus may include an optical pickup reading out data from an optical disk, an automatic gain controller operating in one of a first amplification mode and a second amplification mode, and a main controller controlling an amplification mode of the automatic gain controller according to the location of the optical pickup. In the first amplification mode, the automatic gain controller amplifies a gain of a RF signal read out by the optical pickup at a fixed amplification rate for a recoding area of the optical disk, and in the second amplification mode, the automatic gain controller adjusts adaptively an amplification rate according to an input level of the RF signal for a non-recording area of the optical disk.

    摘要翻译： 一种具有自动增益控制的光学再现装置和方法。 光学再现装置可以包括从光盘读出数据的光学拾取器，以第一放大模式和第二放大模式中的一种工作的自动增益控制器，以及控制根据本发明的自动增益控制器的放大模式的主控制器 光学拾取器的位置。 在第一放大模式中，自动增益控制器以光盘的记录区域的固定放大率放大由光拾取器读出的RF信号的增益，在第二放大模式中，自动增益控制器自适应地调整 根据用于光盘的非记录区域的RF信号的输入电平的放大率。

    Digital signal recording circuit for digital video cassette tape recorder
    39.
    发明授权
    Digital signal recording circuit for digital video cassette tape recorder 失效
    数字录像机数字信号记录电路

    公开(公告)号：US5204790A

    公开(公告)日：1993-04-20

    申请号：US661266

    申请日：1991-02-27

    申请人： Chang-jin Yang

    发明人： Chang-jin Yang

    IPC分类号： G11B5/09 ,  G11B20/00 ,  G11B20/10 ,  G11B20/18 ,  H04N5/92

    CPC分类号： G11B5/09 ,  G11B20/10009 ,  G11B20/10527

    摘要： A digital signal recording circuit compensates for the deterioration of a digital signal that occurs during recording and reduces the occurrence of bit errors during playback in a digital signal recording and playback apparatus. The circuit includes a read/write circuit which records and reads digital signals to and from a recording medium and which relays its data to a playback circuit for reproducing digital signals read from the recording medium. The circuit also provides an input signal processing circuit which converts along signals into processed digital signals for recording and a compensation circuit which both amplifies the digital signal for recording and compensates for bit deterioration caused by frequency variations in the processed digital signals.

    摘要翻译： 数字信号记录电路补偿在记录期间发生的数字信号的恶化，并减少在数字信号记录和重放装置中重放期间的位错误的发生。 该电路包括读/写电路，其记录和读取数字信号到记录介质和从记录介质读取数据信号，并将其数据中继到用于再现从记录介质读取的数字信号的重放电路。 该电路还提供了一个输入信号处理电路，其将信号转换成用于记录的经处理的数字信号和补偿电路，两者都放大用于记录的数字信号，并补偿由经处理的数字信号中的频率变化引起的位劣化。