Tachometer for deriving average velocity output by sampling position
signal
    1.
    发明授权
    Tachometer for deriving average velocity output by sampling position signal 失效
    用于通过采样位置信号导出平均速度输出的转速计

    公开(公告)号:US4329721A

    公开(公告)日:1982-05-11

    申请号:US120453

    申请日:1980-02-11

    CPC分类号: G11B21/083 G11B5/553

    摘要: A tachometer for generating a velocity signal in a data disc pack servo system comprising a sampling pulse generator for producing pulses that are spaced from one another by a constant amount representative of a distance increment of radial movement of a servo head in the system, a timer for measuring the time between the sampling pulses, the timer including a clock pulse source and a counter which is started by one sampling pulse and reset by the next succeeding sampling pulse so that the digital output thereof is proportional to time and a computer for computing average velocity by deriving the quotient of the distance increment divided by the time required for the servo head to traverse such distance increment.

    摘要翻译: 一种用于在数据盘组伺服系统中产生速度信号的转速计,包括采样脉冲发生器,用于产生表示系统中伺服磁头的径向运动的距离增量的恒定量的脉冲,定时器 用于测量采样脉冲之间的时间,定时器包括时钟脉冲源和由一个采样脉冲启动并由下一个后续采样脉冲复位的计数器,使得其数字输出与时间成正比,计算机用于计算平均值 速度通过导出距离增量的商除以伺服头穿过这样的距离增量所需的时间。

    Automatic gain control for transducer circuit
    2.
    发明授权
    Automatic gain control for transducer circuit 失效
    换能器电路自动增益控制

    公开(公告)号:US3999133A

    公开(公告)日:1976-12-21

    申请号:US649867

    申请日:1976-01-16

    申请人: Siu Kee Lee John Cuda

    发明人: Siu Kee Lee John Cuda

    CPC分类号: H03G3/3084 G01D5/38

    摘要: A circuit for controlling the gain of a transducer circuit by detecting the peak voltage of the transducer circuit, comparing the voltage with the reference voltage and modifying the output of the transducer circuit in a direction to adjust the output voltage towards a desired voltage.

    摘要翻译: 一种用于通过检测换能器电路的峰值电压来控制换能器电路的增益的电路,将该电压与参考电压进行比较,并在将输出电压调节到所需电压的方向上修改换能器电路的输出。

    Preamplifier circuit configurable to allow simultaneous read and write operations for self-servo writing a disk drive
    3.
    发明授权
    Preamplifier circuit configurable to allow simultaneous read and write operations for self-servo writing a disk drive 有权
    前置放大器电路可配置为允许同时读写操作,用于自动写入磁盘驱动器

    公开(公告)号:US06693760B1

    公开(公告)日:2004-02-17

    申请号:US09540445

    申请日:2000-03-31

    IPC分类号: G11B2102

    CPC分类号: G11B5/59633 G11B5/024

    摘要: A preamplifier circuit is disclosed comprising a data input for receiving write data, a read signal output for outputting an amplified read signal, a read signal input for receiving a read signal from a read element, and a write signal output for supplying a write signal to a write element. The preamplifier circuit further comprises a first amplifier circuit, responsive to the write data, for generating the write signal supplied to the write element, and a second amplifier circuit for amplifying the read signal from the read element to generate the amplified read signal output via the read signal output. A head control circuit, responsive to head select data, simultaneously enables the first and second amplifier circuits to perform a simultaneous read and write operation.

    摘要翻译: 公开了一种前置放大器电路,包括用于接收写入数据的数据输入端,用于输出放大的读取信号的读取信号输出端,用于从读取元件接收读取信号的读取信号输入端和用于将写入信号提供给 写元素。 前置放大器电路还包括响应于写入数据的第一放大器电路,用于产生提供给写入元件的写入信号,以及第二放大器电路,用于放大来自读取元件的读取信号,以产生经由 读信号输出。 响应于头部选择数据的头部控制电路同时使第一和第二放大器电路执行同时的读取和写入操作。

    Self-servo writing a disk drive by propagating interleaved sets of timing clocks and servo bursts during alternate time intervals
    4.
    发明授权
    Self-servo writing a disk drive by propagating interleaved sets of timing clocks and servo bursts during alternate time intervals 有权
    通过在交替时间间隔期间传播交错的定时时钟和伺服脉冲串来自动伺服写入磁盘驱动器

    公开(公告)号:US06600620B1

    公开(公告)日:2003-07-29

    申请号:US09541136

    申请日:2000-03-31

    IPC分类号: G11B2102

    CPC分类号: G11B5/59644

    摘要: The present invention may be regarded as a self-servo writing disk drive comprising a head having a read element radially offset from a write element. During a first time interval, the read element is positioned over a first radial location to read first A clock data to generate first circumferential timing information and first A servo bursts to generate first position control information. The first position control information is used for positioning the write element over a second radial location, and the first circumferential timing information is used for writing second B clock data and second B servo bursts to the second radial location. During a second time interval, the read element is positioned over the first radial location to read first B clock data to generate second circumferential timing information and first B servo bursts to generate second position control information. The second position control information is used for positioning the write element over the second radial location, and the second circumferential timing information is used for writing second A clock data and second A servo bursts to the second radial location.

    摘要翻译: 本发明可以被认为是包括具有从写入元件径向偏移的读取元件的头的自伺服写入盘驱动器。 在第一时间间隔期间,读取元件位于第一径向位置上以读取第一A时钟数据以产生第一周期定时信息和第一A伺服脉冲串以产生第一位置控制信息。 第一位置控制信息用于在第二径向位置定位写元件,并且第一周期定时信息用于将第二B时钟数据和第二B伺服脉冲串写入第二径向位置。 在第二时间间隔期间,读取元件位于第一径向位置上以读取第一B时钟数据以产生第二周期定时信息和第一B伺服突发,以产生第二位置控制信息。 第二位置控制信息用于将写元件定位在第二径向位置上,并且第二周期定时信息用于将第二A时钟数据和第二A伺服脉冲串写入第二径向位置。

    Coarse and fine control for position servo
    6.
    发明授权
    Coarse and fine control for position servo 失效
    伺服精度高精度控制

    公开(公告)号:US4006394A

    公开(公告)日:1977-02-01

    申请号:US524766

    申请日:1974-11-18

    摘要: A closed loop servo system for positioning a head relative to a magnetic recording element wherein track crossings are normally utilized to generate a feedback signal to the servo for positioning the head and wherein for a precise indication of head positioning between track crossings the velocity of movement of the head is integrated and fed into the servo system to provide a fine position signal.

    摘要翻译: 一种用于相对于磁记录元件定位磁头的闭环伺服系统,其中通常使用磁道交叉来产生用于定位磁头的伺服机构的反馈信号,并且其中,为了精确指示轨迹之间的磁头定位, 头部被集成并馈送到伺服系统中以提供精细位置信号。