公开(公告)号：US20150003222A1

公开(公告)日：2015-01-01

申请号：US14457518

申请日：2014-08-12

Applicant: Seagate Technology LLC

Inventor： Housan Dakroub ,  Edward Charles Gage ,  Tim Rausch

IPC: G11B5/60

CPC classification number: G11B5/6076 ,  G11B5/6005 ,  G11B5/607 ,  G11B11/10554 ,  G11B20/10009

Abstract: A transducer is configured to interact with a magnetic storage medium, a first channel comprises a first sensor and first circuitry configured to adjust a plurality of first channel parameters, and a second channel comprises a second sensor and second circuitry configured to adjust a plurality of second channel parameters. The first and second channel parameters are independently adjustable by the first and second circuitry, respectively. A detector is coupled to the first and second channels, and configured to detect a head-medium interface event.

Abstract translation: 换能器被配置为与磁存储介质相互作用，第一通道包括第一传感器和配置成调整多个第一通道参数的第一电路，第二通道包括第二传感器和第二电路，其被配置为调整多个第二通道参数 通道参数。 第一和第二通道参数分别由第一和第二电路独立地调节。 检测器耦合到第一和第二通道，并且被配置为检测头 - 介质接口事件。

公开(公告)号：US20150213813A1

公开(公告)日：2015-07-30

申请号：US14168970

申请日：2014-01-30

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Todd Michael Lammers ,  Housan Dakroub ,  Jason C. Jury

IPC: G11B5/027

CPC classification number: G11B20/10018 ,  G11B5/02

Abstract: The implementations disclosed herein provide for a storage device including a preamplifier that dynamically adjusts at least one of a rise time and fall time of an analog write current pulse based on a length of a corresponding write transition and/or characteristics of a media location where the write transition is to be recorded.

Abstract translation: 本文公开的实现方案提供了一种存储设备，其包括前置放大器，其基于相应写入转变的长度和/或媒体位置的特性动态地调整模拟写入电流脉冲的上升时间和下降时间中的至少一个，其中 写入转换将被记录。

公开(公告)号：US09042207B2

公开(公告)日：2015-05-26

申请号：US13890785

申请日：2013-05-09

Applicant: Seagate Technology LLC

Inventor： Housan Dakroub

IPC: G11B13/04 ,  G11B5/60 ,  G11B11/105 ,  G11B5/31 ,  G11B5/00

CPC classification number: G11B5/6088 ,  G11B5/314 ,  G11B11/10539 ,  G11B13/04 ,  G11B2005/0021

Abstract: Controlling a laser diode involves activating a first current source in preparation for writing to a magnetic recording medium. The first current source applies a threshold current to a laser diode that brings the laser diode close to an operating point. Responsive to a write signal, a second current source is activated that applies a write current to the laser diode. A combination of the write current and the threshold current fully energizes the laser diode and is less than a target recording current. Coincident with the activation of the second current source, a photodiode is activated that is optically coupled to the laser diode. The activated photodiode causes a feedback current to be applied to the laser diode.

Abstract translation: 控制激光二极管涉及激活第一电流源以准备写入磁记录介质。 第一个电流源向激光二极管施加阈值电流，使激光二极管接近工作点。 响应于写入信号，第二电流源被激活，其向激光二极管施加写入电流。 写入电流和阈值电流的组合完全激励激光二极管，并且小于目标记录电流。 与激活第二电流源一致，激活光电二极管，光电耦合到激光二极管。 激活的光电二极管使得反馈电流被施加到激光二极管。

公开(公告)号：US09355677B2

公开(公告)日：2016-05-31

申请号：US14168970

申请日：2014-01-30

Applicant: Seagate Technology LLC

Inventor： Todd Michael Lammers ,  Housan Dakroub ,  Jason C. Jury

IPC: G11B20/10 ,  G11B5/02

CPC classification number: G11B20/10018 ,  G11B5/02

Abstract: The implementations disclosed herein provide for a storage device including a preamplifier that dynamically adjusts at least one of a rise time and fall time of an analog write current pulse based on a length of a corresponding write transition and/or characteristics of a media location where the write transition is to be recorded.

Abstract translation: 本文公开的实现方案提供了一种存储设备，其包括前置放大器，其基于相应写入转变的长度和/或媒体位置的特性动态地调整模拟写入电流脉冲的上升时间和下降时间中的至少一个，其中 写入转换将被记录。

公开(公告)号：US09070377B1

公开(公告)日：2015-06-30

申请号：US14104676

申请日：2013-12-12

Applicant: Seagate Technology LLC

Inventor： Housan Dakroub ,  Edward Charles Gage ,  Jan-Ulrich Thiele

IPC: G11B11/00 ,  G11B5/02 ,  G11B7/1263 ,  G11B5/00

CPC classification number: G11B5/02 ,  G11B7/1263 ,  G11B2005/0021

Abstract: Polarity transitions of a write signal applied to a write coil correspond to first bit boundaries written to a magnetic recording media. A heat signal is applied to heat the magnetic recording media via a heat source while bits are being written. The heat signal includes negative pulses that de-energize the heat source during cooling periods corresponding to the writing of the first bit boundaries. The negative pulses are offset from the polarity transitions by a predetermined time.

Abstract translation: 施加到写入线圈的写信号的极性转变对应于写入磁记录介质的第一位边界。 当写入位时，通过加热信号加热磁记录介质。 热信号包括在对应于第一位边界的写入的冷却期间使热源断电的负脉冲。 负脉冲从极性转变偏移预定时间。

公开(公告)号：US09123372B2

公开(公告)日：2015-09-01

申请号：US14457518

申请日：2014-08-12

Applicant: Seagate Technology LLC

Inventor： Housan Dakroub ,  Edward Charles Gage ,  Tim Rausch

IPC: G11B11/00 ,  G11B5/09 ,  G11B5/60 ,  G11B11/105 ,  G11B20/10

CPC classification number: G11B5/6076 ,  G11B5/6005 ,  G11B5/607 ,  G11B11/10554 ,  G11B20/10009

Abstract: A transducer is configured to interact with a magnetic storage medium, a first channel comprises a first sensor and first circuitry configured to adjust a plurality of first channel parameters, and a second channel comprises a second sensor and second circuitry configured to adjust a plurality of second channel parameters. The first and second channel parameters are independently adjustable by the first and second circuitry, respectively. A detector is coupled to the first and second channels, and configured to detect a head-medium interface event.

Abstract translation: 换能器被配置为与磁存储介质相互作用，第一通道包括第一传感器和配置成调整多个第一通道参数的第一电路，第二通道包括第二传感器和第二电路，其被配置为调整多个第二通道参数 通道参数。 第一和第二通道参数分别由第一和第二电路独立地调节。 检测器耦合到第一和第二通道，并且被配置为检测头 - 介质接口事件。

公开(公告)号：US09123355B1

公开(公告)日：2015-09-01

申请号：US14028413

申请日：2013-09-16

Applicant: Seagate Technology LLC

Inventor： Housan Dakroub ,  Christine Green ,  Edward C. Gage ,  Tim Rausch

IPC: G11B11/00 ,  G11B5/02 ,  G11B13/04 ,  G11B11/105 ,  G11B5/00 ,  G11B7/126

CPC classification number: G11B5/02 ,  G11B5/455 ,  G11B7/126 ,  G11B11/10515 ,  G11B11/1053 ,  G11B11/10595 ,  G11B13/04 ,  G11B2005/001 ,  G11B2005/0021

Abstract: A circuit may be configured to reduce the power consumption and extend the life of a near field transducer of a heat-assisted magnetic recording (HAMR) device by pulsing a laser. The current that drives the laser may be of a frequency and magnitude so as to approximate the value of a continuous current in a continuous, non-pulsed laser. A system on chip (SOC), which may include a HAMR channel, can generate a laser data signal that may be synchronous with, and offset from, a write signal by a certain period of time, and may calculate certain parameters such as peak current and pulse width that may be applied to the signals in a preamp. The preamp signals can be used to program data to a disc medium.

Abstract translation: 电路可以被配置为通过脉冲激光来减少功率消耗并延长热辅助磁记录（HAMR）装置的近场传感器的寿命。 驱动激光器的电流可以是频率和幅度，以便在连续的非脉冲激光器中接近连续电流的值。 可以包括HAMR通道的片上系统（SOC）可以产生与写入信号同步并偏移一定时间段的激光数据信号，并且可以计算某些参数，例如峰值电流 以及可以施加到前置放大器中的信号的脉冲宽度。 前置放大器信号可用于将数据编程到盘介质。

公开(公告)号：US20150170699A1

公开(公告)日：2015-06-18

申请号：US14104676

申请日：2013-12-12

Applicant: Seagate Technology LLC

Inventor： Housan Dakroub ,  Edward Charles Gage ,  Jan-Ulrich Thiele

IPC: G11B7/1263

CPC classification number: G11B5/02 ,  G11B7/1263 ,  G11B2005/0021

Abstract: Polarity transitions of a write signal applied to a write coil correspond to first bit boundaries written to a magnetic recording media. A heat signal is applied to heat the magnetic recording media via a heat source while bits are being written. The heat signal includes negative pulses that de-energize the heat source during cooling periods corresponding to the writing of the first bit boundaries. The negative pulses are offset from the polarity transitions by a predetermined time.

Abstract translation: 施加到写入线圈的写信号的极性转变对应于写入磁记录介质的第一位边界。 当写入位时，通过加热信号加热磁记录介质。 热信号包括在对应于第一位边界的写入的冷却期间使热源断电的负脉冲。 负脉冲从极性转变偏移预定时间。

公开(公告)号：US09019646B2

公开(公告)日：2015-04-28

申请号：US13831129

申请日：2013-03-14

Applicant: Seagate Technology LLC

Inventor： Tim Rausch ,  Jon D. Trantham ,  John West Dykes ,  Housan Dakroub ,  Charles Paul Henry ,  Edward Charles Gage ,  Raul Horacio Andruet ,  James Gary Wessel ,  James Dillon Kiely ,  Bruce Douglas Buch ,  Barmeshwar Vikramaditya

IPC: G11B5/02 ,  G11B13/04 ,  G11B5/31 ,  G11B5/60 ,  G11B5/00

CPC classification number: G11B13/04 ,  G11B5/314 ,  G11B5/6088 ,  G11B2005/0021

Abstract: An apparatus includes a write element configured to apply a magnetic field to write data on a portion of a heat-assisted magnetic recording media in response to an energizing current. An energy source is configured to heat the portion of the media being magnetized by the write element. A preheat energizing current is applied to the write element during an interval before writing the data to the portion of the media. The preheat energizing current does not cause data to be written to the media and brings at least one of the write element and driver circuitry into thermal equilibrium prior to writing the data on the portion.

Abstract translation: 一种装置包括：写入元件，其被配置为响应于激励电流施加磁场以在热辅助磁记录介质的一部分上写入数据。 能量源被配置为加热被写入元件磁化的介质的部分。 在将数据写入介质的一部分之前的间隔期间，将预热通电电流施加到写入元件。 在将数据写入该部分之前，预热通电电流不会导致数据被写入介质并且使写入元件和驱动器电路中的至少一个进入热平衡。

公开(公告)号：US20140334274A1

公开(公告)日：2014-11-13

申请号：US13890785

申请日：2013-05-09

Applicant: SEAGATE TECHNOLOGY LLC

Inventor： Housan Dakroub

IPC: G11B13/04

CPC classification number: G11B5/6088 ,  G11B5/314 ,  G11B11/10539 ,  G11B13/04 ,  G11B2005/0021

Abstract: Controlling a laser diode involves activating a first current source in preparation for writing to a magnetic recording medium. The first current source applies a threshold current to a laser diode that brings the laser diode close to an operating point. Responsive to a write signal, a second current source is activated that applies a write current to the laser diode. A combination of the write current and the threshold current fully energizes the laser diode and is less than a target recording current. Coincident with the activation of the second current source, a photodiode is activated that is optically coupled to the laser diode. The activated photodiode causes a feedback current to be applied to the laser diode.

Abstract translation: 控制激光二极管涉及激活第一电流源以准备写入磁记录介质。 第一个电流源向激光二极管施加阈值电流，使激光二极管接近工作点。 响应于写入信号，第二电流源被激活，其向激光二极管施加写入电流。 写入电流和阈值电流的组合完全激励激光二极管，并且小于目标记录电流。 与激活第二电流源一致，激活光电二极管，光电耦合到激光二极管。 激活的光电二极管使得反馈电流被施加到激光二极管。