利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

37 条记录 (耗时 0.012 秒)

    A method of measuring the flying height of a slider in a moving magnetic storage apparatus
    35.
    发明公开
    A method of measuring the flying height of a slider in a moving magnetic storage apparatus 失效
    测量滑动器在移动磁存储装置中的飞行高度的方法

    公开(公告)号：EP0256356A3

    公开(公告)日：1989-10-18

    申请号：EP87110754.6

    申请日：1987-07-24

    申请人： International Business Machines Corporation

    发明人： Brown, Byron Richard ,  Hu, Hung Liang ,  Klaassen, Klaas Berend ,  Lum, Joseph Jack ,  van Peppen, Jacobus Cornelis Leonardus ,  Weresin, Walter Eugene

    IPC分类号： G11B5/60 ,  G11B5/48 ,  G11B5/455

    CPC分类号： G11B5/012 ,  G11B5/6029 ,  G11B27/36 ,  G11B2005/001 ,  G11B2005/0013

    摘要： In a method of measuring the flying height of a slider supporting a magnetic transducer in an operational magnetic storage system, relative motion is produced between the magnetic transducer and a magnetic recording medium at a first velocity so that the resulting air bearing positions the magnetic transducer slider at a first flying height from the magnetic medium. A single signal of constant periodicity is written over a predetermined area of the recording medium by the magnetic transducer, and a readback signal is sensed from the predetermined area of the recording medium to produce a first signal. The flying height of the magnetic transducer slider is lowered to substantially zero, and a readback signal is sensed at the lowered flying height to produce a second signal. The first flying height is then calculated as the ratio, expressed in decibels, of the first and second signals times the wavelength divided by a constant. In another embodiment a plurality of signals are recorded and readback signals are simultaneously sensed at two separate wavelengths. In a further embodiment, a signal is recorded which has a spectral content comprising a plurality of different frequencies, and readback signals are simultaneously sensed at two separate wavelengths.

    A method of measuring the flying height of a slider in a moving magnetic storage apparatus
    36.
    发明公开
    A method of measuring the flying height of a slider in a moving magnetic storage apparatus 失效
    测量磁盘单元的磁盘的十字头的距离的方法。

    公开(公告)号：EP0256356A2

    公开(公告)日：1988-02-24

    申请号：EP87110754.6

    申请日：1987-07-24

    申请人： International Business Machines Corporation

    发明人： Brown, Byron Richard ,  Hu, Hung Liang ,  Klaassen, Klaas Berend ,  Lum, Joseph Jack ,  van Peppen, Jacobus Cornelis Leonardus ,  Weresin, Walter Eugene

    IPC分类号： G11B5/60 ,  G11B5/48 ,  G11B5/455

    CPC分类号： G11B5/012 ,  G11B5/6029 ,  G11B27/36 ,  G11B2005/001 ,  G11B2005/0013

    摘要： In a method of measuring the flying height of a slider supporting a magnetic transducer in an operational magnetic storage system, relative motion is produced between the magnetic transducer and a magnetic recording medium at a first velocity so that the resulting air bearing positions the magnetic transducer slider at a first flying height from the magnetic medium. A single signal of constant periodicity is written over a predetermined area of the recording medium by the magnetic transducer, and a readback signal is sensed from the predetermined area of the recording medium to produce a first signal. The flying height of the magnetic transducer slider is lowered to substantially zero, and a readback signal is sensed at the lowered flying height to produce a second signal. The first flying height is then calculated as the ratio, expressed in decibels, of the first and second signals times the wavelength divided by a constant. In another embodiment a plurality of signals are recorded and readback signals are simultaneously sensed at two separate wavelengths. In a further embodiment, a signal is recorded which has a spectral content comprising a plurality of different frequencies, and readback signals are simultaneously sensed at two separate wavelengths.

    摘要翻译： 在测量滑动器支持在操作磁性存储系统中的磁换能器的飞行高度的方法，相对运动的磁换能器，并以第一速度的磁性记录介质之间产生的所以没有产生的空气轴承的位置的磁换能器滑块 在从磁介质上的第一浮动高度。 恒定周期性的单个信号被写入在由磁换能器在记录介质的预定区域，和回读信号被从记录介质，以产生第一信号的预定区域感测到的。 磁换能器滑块的飞行高度降低到基本为零，和回读信号在下降飞行高度被感测以产生第二信号。 然后，第一浮动高度被计算为比率，用分贝表示，第一和第二信号时间除以常数的波长。 在另一个实施例的信号的多个被记录和回读信号在两个不同的波长同时感测。 在另一实施例中，信号被记录其中有一个频谱内容包括不同频率的多个，并且回读信号在两个不同的波长同时感测。

    A circuit for biasing a magnetoresistive sensor and amplifying signals produced thereby
    37.
    发明公开
    A circuit for biasing a magnetoresistive sensor and amplifying signals produced thereby 失效
    电路，用于偏置磁阻传感器和所述激励信号的增益。

    公开(公告)号：EP0251023A2

    公开(公告)日：1988-01-07

    申请号：EP87108643.5

    申请日：1987-06-16

    申请人： International Business Machines Corporation

    发明人： Jove, Stephen Alan ,  Klaassen, Klaas Berend ,  Nomura, Calvin Shizuo ,  Van Peppen, Jacobus Cornelis Leonardus

    IPC分类号： G01R33/06

    CPC分类号： G01R33/09 ,  G11B5/02 ,  G11B2005/0016

    摘要： The resistance (Rh) of a magnetoresistive sensor is disposed between the bases of a differential pair of transistors (T1a and T1b) comprising the input stage of an amplifier. Constant bias voltage for the sensor is provided (by J1 and RE) independently of the resistance of the sensor. DC feedback (from g₀) to the input stage balances current flow in both paths of the differential input stage to correct for DC offset arising in the output from the input stage emitter resistor (RE). The amplified signal represents ΔR h /R h , where ΔR h is the change in steady-state resistance, R h , of the sensor.

    摘要翻译： 磁阻传感器的电阻（RH）是一个差分对晶体管（T1a和T1b）包括放大器的输入级的的基极之间设置。 用于传感器恒定的偏置电压被提供（由J1和RE）的传感器的电阻的unabhängig。 DC反馈（来自克0）到输入级余额在差分输入级的两个路径的电流流动，以校正DC偏移在从输入级发射极电阻器（RE）的输出所产生。 放大后的信号darstellt DELTA的Rh / RH，其中R h是DELTA稳态性，有Rh的变化的传感器的，。