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    IMPLEMENTING SPIN-TORQUE OSCILLATOR SENSING WITH ENHANCED INTEGRATED DEMODULATOR FOR HARD DISK DRIVES
    1.
    发明申请
    IMPLEMENTING SPIN-TORQUE OSCILLATOR SENSING WITH ENHANCED INTEGRATED DEMODULATOR FOR HARD DISK DRIVES 有权
    用于硬盘驱动器的增强型集成式解调器实现旋转振动振荡器感应

    公开(公告)号：US20130148224A1

    公开(公告)日：2013-06-13

    申请号：US13316419

    申请日：2011-12-09

    申请人： Patrick Mesquita Braganca ,  Richard Leo Galbraith ,  Bruce Alvin Gurney ,  Neil Smith ,  Bruce Wilson ,  Rehan Ahmed Zakai

    发明人： Patrick Mesquita Braganca ,  Richard Leo Galbraith ,  Bruce Alvin Gurney ,  Neil Smith ,  Bruce Wilson ,  Rehan Ahmed Zakai

    IPC分类号： G11B20/06

    CPC分类号： H03D3/009 ,  G11B20/10018 ,  G11B20/10027 ,  G11B2220/2516

    摘要： A method, apparatus, and system are provided for implementing spin-torque oscillator sensing with an enhanced integrated demodulator for hard disk drives. The demodulator receives an input signal from a STO read sensor having an oscillation frequency ω related to the strength of the detected magnetic signal field. The demodulator includes a pair of mixers coupled to a quadrature reference oscillator with respective quadrature components cos(ω0t), and sin(ω0t) of the quadrature reference oscillator being mixed with a received input signal to form signals at the sum and difference frequencies, ω±ω0. Each of these mixer products is lowpass filtered by a respective a lowpass filter to remove the sum frequency components for providing a demodulator output signal that is directly proportional the STO oscillation frequency ω. The demodulator output signal is used for processing by data detection electronics.

    摘要翻译： 提供了一种用于通过用于硬盘驱动器的增强型集成解调器来实现自旋扭矩振荡器感测的方法，装置和系统。 解调器接收来自具有与所检测的磁信号场的强度相关的振荡频率ω的STO读取传感器的输入信号。 解调器包括耦合到具有相应正交分量cos（ωωt）的正交参考振荡器的正交参考振荡器对，并且正交基准振荡器的sin（ω0t）与接收的输入信号混合以形成和频率和差频率ω ±omega0。 这些混频器产品中的每一个由相应的低通滤波器进行低通滤波，以去除和频分量，以提供与STO振荡频率ω直接成比例的解调器输出信号。 解调器输出信号用于数据检测电子设备的处理。

    Implementing spin-torque oscillator sensing with enhanced integrated demodulator for hard disk drives
    3.
    发明授权
    Implementing spin-torque oscillator sensing with enhanced integrated demodulator for hard disk drives 有权
    通过增强的集成解调器实现用于硬盘驱动器的自旋扭矩振荡器感应

    公开(公告)号：US08570677B2

    公开(公告)日：2013-10-29

    申请号：US13316419

    申请日：2011-12-09

    申请人： Patrick Mesquita Braganca ,  Richard Leo Galbraith ,  Bruce Alvin Gurney ,  Neil Smith ,  Bruce Wilson ,  Rehan Ahmed Zakai

    发明人： Patrick Mesquita Braganca ,  Richard Leo Galbraith ,  Bruce Alvin Gurney ,  Neil Smith ,  Bruce Wilson ,  Rehan Ahmed Zakai

    IPC分类号： G11B20/06 ,  G11B5/02 ,  G11B21/02

    CPC分类号： H03D3/009 ,  G11B20/10018 ,  G11B20/10027 ,  G11B2220/2516

    摘要： A method, apparatus, and system are provided for implementing spin-torque oscillator sensing with an enhanced integrated demodulator for hard disk drives. The demodulator receives an input signal from a STO read sensor having an oscillation frequency ω related to the strength of the detected magnetic signal field. The demodulator includes a pair of mixers coupled to a quadrature reference oscillator with respective quadrature components cos(ω0t), and sin(ω0t) of the quadrature reference oscillator being mixed with a received input signal to form signals at the sum and difference frequencies, ω±ω0. Each of these mixer products is lowpass filtered by a respective a lowpass filter to remove the sum frequency components for providing a demodulator output signal that is directly proportional the STO oscillation frequency ω. The demodulator output signal is used for processing by data detection electronics.

    摘要翻译： 提供了一种用于通过用于硬盘驱动器的增强型集成解调器来实现自旋扭矩振荡器感测的方法，装置和系统。 解调器接收来自具有与所检测的磁信号场的强度相关的振荡频率ω的STO读取传感器的输入信号。 解调器包括耦合到具有相应正交分量cos（ωωt）的正交参考振荡器的正交参考振荡器对，并且正交基准振荡器的sin（ω0t）与接收的输入信号混合以形成和频率和差频率ω ±omega0。 这些混频器产品中的每一个由相应的低通滤波器进行低通滤波，以去除和频分量，以提供与STO振荡频率ω直接成比例的解调器输出信号。 解调器输出信号用于数据检测电子设备的处理。

    Signal-extraction laser-pulse system architecture for thermally-assisted magnetic recording
    7.
    发明授权
    Signal-extraction laser-pulse system architecture for thermally-assisted magnetic recording 有权
    用于热辅助磁记录的信号提取激光脉冲系统架构

    公开(公告)号：US08310902B1

    公开(公告)日：2012-11-13

    申请号：US13337046

    申请日：2011-12-23

    申请人： John Thomas Contreras ,  Rehan Ahmed Zakai

    发明人： John Thomas Contreras ,  Rehan Ahmed Zakai

    IPC分类号： G11B11/00

    CPC分类号： G11B5/02 ,  G11B20/10222 ,  G11B20/1024 ,  G11B27/36 ,  G11B2005/0021 ,  G11B2220/2516

    摘要： A thermal-assisted magnetic recording (TAMR) system is described which generates laser-pulse signals from the write data line. Additionally, training signals for initial synchronization are fed to the preamp IC using the write data line during servo read cycle. This requires no increase in the number of wires going to read-write driver chip (R/W IC) (preamp). In embodiments of the invention the R/W IC also includes registers that are set using serial data from the system electronics to influence the characteristics of the drive signal to the laser.

    摘要翻译： 描述了从写入数据线产生激光脉冲信号的热辅助磁记录（TAMR）系统。 此外，初始同步的训练信号在伺服读周期期间使用写数据线馈送到前置放大器IC。 这不需要增加读写驱动器芯片（R / W IC）（前置放大器）的数量。 在本发明的实施例中，R / W IC还包括使用来自系统电子装置的串行数据设置以影响到激光器的驱动信号的特性的寄存器。

    Distributed temperature detector architecture for head disk interface systems
    8.
    发明授权
    Distributed temperature detector architecture for head disk interface systems 有权
    用于磁头磁盘接口系统的分布式温度检测器架构

    公开(公告)号：US08482872B1

    公开(公告)日：2013-07-09

    申请号：US13333565

    申请日：2011-12-21

    申请人： John Thomas Contreras ,  Rehan Ahmed Zakai ,  Samir Y Garzon

    发明人： John Thomas Contreras ,  Rehan Ahmed Zakai ,  Samir Y Garzon

    IPC分类号： G11B27/36 ,  G11B21/02

    CPC分类号： G11B5/6005 ,  G11B5/6064 ,  G11B5/607 ,  G11B5/6076

    摘要： Approaches for a distributed temperature detector architecture in a head disk interface system of a hard-disk drive (HDD). A HDD may include a read/write head comprising a read element and a write element and a read/write integrated circuit (IC). The read/write head may comprise (a) a first temperature sensor that is located relatively near an air bearing surface (ABS) of the read/write head and (b) a second temperature sensor that is offset from the ABS. The read/write IC is configured to detect when the read/write head makes physical contact with a disk based on a difference in temperature measured by the first and second temperature sensor. The first and second temperature sensors form a bridge circuit, such as a Wheatstone bridge, with a first IC resistor and a second IC resistor that both reside in the read/write IC, allowing the temperature of the read/write head to be accurately measured.

    摘要翻译： 在硬盘驱动器（HDD）的磁头磁盘接口系统中的分布式温度检测器架构的方法。 HDD可以包括读/写头，读/写头包括读元件和写元件以及读/写集成电路（IC）。 读/写头可以包括（a）第一温度传感器，其位于相对靠近读/写头的空气轴承表面（ABS）处，以及（b）与ABS偏移的第二温度传感器。 读/写IC被配置为基于由第一和第二温度传感器测量的温度差来检测读/写头何时与盘物理接触。 第一和第二温度传感器形成桥接电路，例如惠斯通电桥，具有位于读/写IC中的第一IC电阻器和第二IC电阻器，允许读/写头的温度被精确测量 。

    Balanced embedded contact sensor with low noise architecture
    9.
    发明授权
    Balanced embedded contact sensor with low noise architecture 有权
    平衡嵌入式接触传感器，具有低噪声结构

    公开(公告)号：US08830614B2

    公开(公告)日：2014-09-09

    申请号：US13333518

    申请日：2011-12-21

    申请人： Samir Y. Garzon ,  Rehan Ahmed Zakai ,  John Thomas Contreras

    发明人： Samir Y. Garzon ,  Rehan Ahmed Zakai ,  John Thomas Contreras

    IPC分类号： G11B5/60

    CPC分类号： G11B5/607 ,  G11B5/40 ,  G11B5/6076

    摘要： Approaches for a hard-disk drive (HDD) having a balanced resistive temperature detector (RTD). A HDD includes a head slider comprising a single RTD. A read/write IC comprises a balance resistor having the same resistance as the single RTD when the head slider is not in physical contact with the disk. The same amount of current flows through the single RTD and the balance resistor except when the head slider is in physical contact with the disk. Detecting a voltage change across the single RTD enables physical contact between the head slider and the disk to be accurately detected using a circuit with low noise. Alternately, the head slider may include two RTDs connected in sequence, and the balance resistor may possess the same resistance as the two RTDs. The two RTDs may vary inversely with environmental changes to avoid the need to recalibrate the balance resistor after any environmental change.

    摘要翻译： 具有平衡电阻温度检测器（RTD）的硬盘驱动器（HDD）的方法。 HDD包括具有单个RTD的磁头滑块。 读/写IC包括当磁头滑块不与磁盘物理接触时具有与单个RTD相同的电阻的平衡电阻器。 除了磁头滑块与磁盘物理接触之外，相同量的电流流过单个RTD和平衡电阻。 通过检测单个RTD上的电压变化，可以使用低噪声电路来精确检测磁头滑块和磁盘之间的物理接触。 或者，磁头滑动器可以包括依次连接的两个RTD，并且平衡电阻可以具有与两个RTD相同的电阻。 两个RTD可能与环境变化反向变化，以避免在任何环境变化后重新校准平衡电阻。

    BALANCED EMBEDDED CONTACT SENSOR WITH LOW NOISE ARCHITECTURE
    10.
    发明申请
    BALANCED EMBEDDED CONTACT SENSOR WITH LOW NOISE ARCHITECTURE 有权
    具有低噪声结构的平衡式嵌入式传感器

    公开(公告)号：US20130163110A1

    公开(公告)日：2013-06-27

    申请号：US13333518

    申请日：2011-12-21

    申请人： Samir Y. Garzon ,  Rehan Ahmed Zakai ,  John Thomas Contreras

    发明人： Samir Y. Garzon ,  Rehan Ahmed Zakai ,  John Thomas Contreras

    IPC分类号： G11B5/48 ,  G11B21/02

    CPC分类号： G11B5/607 ,  G11B5/40 ,  G11B5/6076

    摘要： Approaches for a hard-disk drive (HDD) having a balanced resistive temperature detector (RTD). A HDD includes a head slider comprising a single RTD. A read/write IC comprises a balance resistor having the same resistance as the single RTD when the head slider is not in physical contact with the disk. The same amount of current flows through the single RTD and the balance resistor except when the head slider is in physical contact with the disk. Detecting a voltage change across the single RTD enables physical contact between the head slider and the disk to be accurately detected using a circuit with low noise. Alternately, the head slider may include two RTDs connected in sequence, and the balance resistor may possess the same resistance as the two RTDs. The two RTDs may vary inversely with environmental changes to avoid the need to recalibrate the balance resistor after any environmental change.

    摘要翻译： 具有平衡电阻温度检测器（RTD）的硬盘驱动器（HDD）的方法。 HDD包括具有单个RTD的磁头滑块。 读/写IC包括当磁头滑块不与磁盘物理接触时具有与单个RTD相同的电阻的平衡电阻器。 除了磁头滑块与磁盘物理接触之外，相同量的电流流过单个RTD和平衡电阻。 通过检测单个RTD上的电压变化，可以使用低噪声电路来精确检测磁头滑块和磁盘之间的物理接触。 或者，磁头滑动器可以包括依次连接的两个RTD，并且平衡电阻可以具有与两个RTD相同的电阻。 两个RTD可能与环境变化反向变化，以避免在任何环境变化后重新校准平衡电阻。