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4 条记录 (耗时 0.011 秒)

    Echo cancellation for disk drive read circuit
    1.
    发明授权
    Echo cancellation for disk drive read circuit 有权
    磁盘驱动器读取电路的回波消除

    公开(公告)号：US06256161B1

    公开(公告)日：2001-07-03

    申请号：US09385788

    申请日：1999-08-30

    申请人： John D. Leighton ,  Sally A. Doherty

    发明人： John D. Leighton ,  Sally A. Doherty

    IPC分类号： G11B502

    CPC分类号： G11B5/012 ,  G11B5/02 ,  G11B23/0007

    摘要： Echo cancellation is provided in a disk drive circuit having a transducing head connected to a preamplifier circuit by an electrical interconnect with a first time delay, a first interface between the preamplifier and the electrical interconnect having a first reflection coefficient and a second interface between the transducing head and the electrical interconnect having a second reflection coefficient. The echo cancellation technique delays a preamplifier output signal with a second time delay, the second time delay being double the first time delay. The preamplifier output signal is also filtered so as to simulate the effects of the first and second reflection coefficients. The delayed and filtered signal is then subtracted from the preamplifier output signal, thereby removing echo content from the signal.

    摘要翻译： 在具有第一时间延迟的电互连连接到前置放大器电路的转换头的磁盘驱动电路中提供回波消除，前置放大器和电互连之间的第一接口具有第一反射系数和第二接口之间的转换 头部和电互连具有第二反射系数。 回波消除技术延迟具有第二时间延迟的前置放大器输出信号，第二时间延迟是第一时间延迟的两倍。 前置放大器输出信号也被滤波，以模拟第一和第二反射系数的影响。 然后从前置放大器输出信号中减去延迟和滤波的信号，从而消除信号中的回波内容。

    Pulse-mode writer
    2.
    发明授权
    Pulse-mode writer 有权
    脉冲模式写入

    公开(公告)号：US06493161B1

    公开(公告)日：2002-12-10

    申请号：US09476016

    申请日：1999-12-31

    申请人： Carl F. Elliott ,  John D. Leighton ,  Sally A. Doherty

    发明人： Carl F. Elliott ,  John D. Leighton ,  Sally A. Doherty

    IPC分类号： G11B509

    CPC分类号： G11B5/09

    摘要： A pulse-mode data writing protocol is disclosed which reduces the time required to implement a transition in the direction of magnetization of a recording medium, and which reduces the total power required to encode a given data sequence. After a magnetic transition is encoded on the medium by generating a write current pulse through the write head, the write current through the recording head is reduced, thereby utilizing the spatial extent of the write bubble to encode the lack of a transition on the medium. Alternate configurations are disclosed for various scenarios of write bubble size versus maximum cell size, all utilizing the principle of the invention.

    摘要翻译： 公开了一种脉冲模式数据写入协议，其减少了在记录介质的磁化方向上实现转换所需的时间，并减少了编码给定数据序列所需的总功率。 通过在写入头上产生写入电流脉冲对介质上的磁转换进行编码之后，通过记录头的写入电流减小，从而利用写入气泡的空间范围来对介质上的转换进行编码。 公开了针对写入气泡尺寸与最大单元尺寸的各种情况的替代配置，所有这些都利用了本发明的原理。