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    Analog tunneling current sensors for use with disk drive storage devices
    3.
    发明授权
    Analog tunneling current sensors for use with disk drive storage devices 有权
    用于磁盘驱动器存储设备的模拟隧道电流传感器

    公开(公告)号：US09099137B2

    公开(公告)日：2015-08-04

    申请号：US14272603

    申请日：2014-05-08

    Applicant: LSI Corporation

    Inventor： Brad A. Natzke ,  Cameron C. Rabe ,  Hong Jiang ,  Andrew P. Krebs ,  Jason P. Brenden

    IPC: G11B5/02 ,  G11B5/60 ,  G11B21/02 ,  H03F3/45 ,  G11B5/00

    CPC classification number: G11B5/6017 ,  G11B5/607 ,  G11B21/02 ,  G11B2005/0008 ,  G11B2005/0018 ,  H03F3/45071 ,  H03F3/4508 ,  H03F2203/45116 ,  H03F2203/45528

    Abstract: Amplifier architectures are provided for current sensing applications. An amplifier includes a load device, an operational amplifier, a current source, and a bipolar transistor. The operational amplifier has a first input terminal connected to a first input node that receives an input current, and a second input terminal connected to a second input node that receives a reference voltage. The current source is connected to an output of the operational amplifier. The operational amplifier, the current source, and the bipolar transistor form a feedback loop that generates and maintains a bias voltage on the first input node based on the reference voltage applied to the second input node. The bipolar transistor amplifies the input current received on the first input node, and generates an amplified input current. The load device converts the amplified input current to an output voltage, wherein the output voltage is used to sense the input current.

    Abstract translation: 为电流检测应用提供放大器架构。 放大器包括负载装置，运算放大器，电流源和双极晶体管。 运算放大器具有连接到接收输入电流的第一输入节点的第一输入端子和连接到接收参考电压的第二输入节点的第二输入端子。 电流源连接到运算放大器的输出端。 运算放大器，电流源和双极晶体管形成反馈回路，其基于施加到第二输入节点的参考电压产生并维持第一输入节点上的偏置电压。 双极晶体管放大在第一输入节点上接收的输入电流，并产生放大的输入电流。 负载装置将放大的输入电流转换为输出电压，其中输出电压用于感测输入电流。

    Resistivity sense bias circuits and methods of operating the same
    5.
    发明授权
    Resistivity sense bias circuits and methods of operating the same 有权
    电阻率偏置电路及其操作方法

    公开(公告)号：US07961418B2

    公开(公告)日：2011-06-14

    申请号：US11747681

    申请日：2007-05-11

    Applicant: Naoko Takemoto ,  Motomu Hashizume

    Inventor： Naoko Takemoto ,  Motomu Hashizume

    IPC: G11B5/03

    CPC classification number: G11B5/59683 ,  G11B5/02 ,  G11B2005/0008

    Abstract: Resistivity sense bias circuits are described herein. An example resistivity sense bias circuit for use with a magnetoresistive read head includes a current biasing portion configured to provide a bias current across the magnetoresistive read head thereby establishing a bias voltage across the magnetoresistive read head, a resistivity sensing portion coupled to the current biasing portion and configured to sense a change in the bias current based on a resistivity change of the magnetoresistive read head, and a voltage source to provide the bias voltage and to adjust the bias voltage in response to the resistivity change of the magnetoresistive read head.

    Abstract translation: 本文描述了电阻率检测偏置电路。 用于磁阻读取头的示例电阻率检测偏置电路包括电流偏置部分，其被配置为在磁阻读取头两端提供偏置电流，从而在磁阻读取头两端建立偏置电压，耦合到电流偏置部分的电阻率检测部分 并且被配置为基于磁阻读取头的电阻率变化和电压源来感测偏置电流的变化，以提供偏置电压并且响应于磁阻读取头的电阻率变化来调整偏置电压。

    Virtual front shield writer
    6.
    发明授权
    Virtual front shield writer 有权
    虚拟前盾作家

    公开(公告)号：US07876531B2

    公开(公告)日：2011-01-25

    申请号：US11651245

    申请日：2007-01-09

    Applicant: Steven Paul Bozeman ,  Olle Gunnar Heinonen ,  Sining Mao

    Inventor： Steven Paul Bozeman ,  Olle Gunnar Heinonen ,  Sining Mao

    IPC: G11B5/187

    CPC classification number: G11B5/1278 ,  G11B2005/0008

    Abstract: A magnetic writer includes a first write element and a second write element. The first write element produces a first field when a first current is passed through a first coil. The second write element, which is disposed relative to the first write element, produces a second field when a second current is passed through a second coil such that the second field at least partially opposes the first field.

    Abstract translation: 磁性写入器包括第一写入元件和第二写入元件。 当第一电流通过第一线圈时，第一写元件产生第一场。 当第二电流通过第二线圈使得第二场至少部分地与第一场相对时，相对于第一写元件布置的第二写入元件产生第二场。

    Method for manufacturing a dual spin valve sensor having a longitudinal bias stack
    7.
    发明授权
    Method for manufacturing a dual spin valve sensor having a longitudinal bias stack 失效
    制造具有纵向偏压叠层的双自旋阀传感器的方法

    公开(公告)号：US07413636B2

    公开(公告)日：2008-08-19

    申请号：US10692968

    申请日：2003-10-24

    Applicant: Tsann Lin ,  Daniele Mauri

    Inventor： Tsann Lin ,  Daniele Mauri

    IPC: C23C14/34

    CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3903 ,  G11B5/3935 ,  G11B5/3954 ,  G11B5/3967 ,  G11B2005/0008

    Abstract: A dual spin valve (SV) sensor is provided with a longitudinal bias stack sandwiched between a first SV stack and a second SV stack. The longitudinal bias stack comprises an antiferromagnetic (AFM) layer sandwiched between first and second ferromagnetic layers. The first and second SV stacks comprise antiparallel (AP)-pinned layers pinned by AFM layers made of an AFM material having a higher blocking temperature than the AFM material of the bias stack allowing the AP-pinned layers to be pinned in a transverse direction and the bias stack to be pinned in a longitudinal direction. The demagnetizing fields of the two AP-pinned layers cancel each other and the bias stack provides flux closures for the sense layers of the first and second SV stacks.

    Abstract translation: 双自旋阀（SV）传感器设置有夹在第一SV堆叠和第二SV堆叠之间的纵向偏置堆叠。 纵向偏置堆叠包括夹在第一和第二铁磁层之间的反铁磁（AFM）层。 第一和第二SV堆叠包括由具有比偏置堆叠的AFM材料更高的阻挡温度的AFM材料制成的AFM层钉住的反平行（AP） - 镀层，其允许AP钉扎层在横向上被钉扎， 偏置堆叠沿纵向方向固定。 两个AP钉扎层的去磁场彼此抵消，并且偏置堆叠为第一和第二SV堆叠的感测层提供磁通闭合。

    Storage system using an array of electro-magnetic sensors
    8.
    发明申请
    Storage system using an array of electro-magnetic sensors 审中-公开
    存储系统使用一系列电磁传感器

    公开(公告)号：US20070164264A1

    公开(公告)日：2007-07-19

    申请号：US10529680

    申请日：2003-09-30

    Applicant: Kars-Michiel Lenssen ,  Hendrik Van Houten

    Inventor： Kars-Michiel Lenssen ,  Hendrik Van Houten

    IPC: H01L47/00

    CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/012 ,  G11B5/03 ,  G11B5/09 ,  G11B5/3909 ,  G11B5/3932 ,  G11B5/4886 ,  G11B5/4984 ,  G11B5/743 ,  G11B5/82 ,  G11B9/14 ,  G11B9/1445 ,  G11B9/1454 ,  G11B9/1472 ,  G11B9/1481 ,  G11B11/007 ,  G11B11/08 ,  G11B23/0014 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0008 ,  G11C11/02 ,  G11C11/16

    Abstract: A record carrier (40) of a removable type has an information plane that is provided with a pattern of an electro-magnetic material constituting an array of bit locations (11). The presence or absence of said material at the information plane represent the value of a bit location. The device has an interface surface (32) for cooperating with the information plane. The interface surface is provided with an array of electro-magnetic sensor elements (54,56) that are sensitive to the presence of said electro-magnetic material within a near-field working distance. The record carrier and device system have alignment means (38,41) for positioning the bit locations near the sensor elements within the near-field working distance between a bit location and the corresponding sensor when the record carrier is mounted in the device.

    Abstract translation: 可拆卸式的记录载体（40）具有设置有构成钻头位置（11）阵列的电磁材料的图案的信息平面。 在信息平面处存在或不存在所述材料表示位位置的值。 该设备具有用于与信息平面配合的接口表面（32）。 接口表面设置有在近场工作距离内对所述电磁材料的存在敏感的电磁传感器元件阵列（54,56）。 记录载体和装置系统具有对准装置（38,41），用于当记录载体安装在装置中时，将位置靠近传感器元件的位位置定位在钻头位置与对应的传感器之间的近场工作距离内。

    Method for recording bursts on a disk and related apparatus
    9.
    发明申请
    Method for recording bursts on a disk and related apparatus 失效
    在磁盘和相关设备上记录脉冲串的方法

    公开(公告)号：US20070103807A1

    公开(公告)日：2007-05-10

    申请号：US11593494

    申请日：2006-11-07

    Applicant: Won-choul Yang

    Inventor： Won-choul Yang

    IPC: G11B5/03 ,  G11B5/02 ,  G11B21/02

    CPC classification number: G11B5/024 ,  G11B5/012 ,  G11B5/465 ,  G11B20/10009 ,  G11B2005/0008 ,  G11B2005/0016 ,  G11B2005/0029

    Abstract: Embodiments of the invention provide a method for recording bursts on a disk and a related apparatus. In accordance with an embodiment of the invention, a method for recording bursts on a burst field of a servo sector of a disk comprises generating a first write current corresponding to burst data provided by a write channel circuit, and generating a second write current having a higher frequency than the first write current using a high frequency AC current generator, wherein the high frequency AC current generator is independent from the write channel circuit. The method further comprises selectively applying the first write current to a write head in response to a signal and selectively applying the second write current to the write head in response to the signal.

    Abstract translation: 本发明的实施例提供了一种用于在盘上记录脉冲串和相关装置的方法。 根据本发明的实施例，一种用于在盘的伺服扇区的脉冲串区域上记录脉冲串的方法包括：产生与由写通道电路提供的突发数据相对应的第一写入电流，以及产生具有 使用高频AC电流发生器比第一写入电流高的频率，其中高频AC电流发生器独立于写入通道电路。 该方法还包括响应于信号选择性地将第一写入电流施加到写入头，并且响应于该信号选择性地将第二写入电流施加到写入头。

    Magnetic head for perpendicular recording with hard bias structure for write pole tip
    10.
    发明授权
    Magnetic head for perpendicular recording with hard bias structure for write pole tip 有权
    磁头用于垂直记录，具有用于写入极尖的硬偏置结构

    公开(公告)号：US07199975B1

    公开(公告)日：2007-04-03

    申请号：US10846040

    申请日：2004-05-15

    Applicant: Tao Pan

    Inventor： Tao Pan

    IPC: G11B5/147

    CPC classification number: G11B5/1278 ,  G11B5/17 ,  G11B5/312 ,  G11B2005/0008

    Abstract: A magnetic head for writing information on a relatively-moving medium is disclosed, the head having a leading end, a trailing end and a medium-facing surface, the head comprising: a soft magnetic write pole that terminates in a pole tip that is disposed adjacent to the medium-facing surface; at least one coil section that is disposed adjacent to the write pole to induce a magnetic flux in the write pole; and a hard magnetic bias structure disposed within one micron of the pole tip to magnetically bias the pole tip.

    Abstract translation: 公开了一种用于在相对移动的介质上写入信息的磁头，头部具有前端，后端和面向中间的表面，头部包括：终止于设置在磁极尖端的软磁性写入磁极 邻近中等面积的表面; 至少一个线圈部分，被布置成与所述写入极相邻以在所述写入极中引起磁通量; 以及设置在极尖的一微米内的硬磁偏置结构，以磁极偏置极尖。

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