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公开(公告)号：US10152997B1
公开(公告)日：2018-12-11
申请号：US15660832
申请日：2017-07-26
Applicant: Seagate Technology LLC
Inventor： Alfredo Sam Chu , Todd Michael Lammers , Thomas Lee Schick , Robert Matousek
Abstract: Systems and methods of laser bias calibration are presented. A preamplifier circuit may configure a laser current supplied to a laser emitter to be a first laser current of the plurality of laser currents during the writing of one or more first sectors. The preamplifier may further detect one or more gaps in a write power signal while the laser current of the laser emitter is configured to be the first laser current. In response to the detection of the one or more gaps in the write power signal, the preamplifier may configure the laser current supplied to the laser emitter to be a second laser current of the plurality of laser currents during the writing of one or more second sectors. The preamplifier circuit may be utilized in a heat assisted magnetic recording device.
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公开(公告)号：US20170162222A1
公开(公告)日：2017-06-08
申请号：US14957220
申请日：2015-12-02
Applicant: Seagate Technology LLC
Inventor： Robert Matousek , Todd Lammers , Jon David Trantham
IPC: G11B11/105
CPC classification number: G11B11/10534 , G11B5/314 , G11B5/40 , G11B5/455 , G11B7/126 , G11B7/1263 , G11B7/1267 , G11B7/13 , G11B11/10595 , G11B19/046 , G11B2005/0021
Abstract: Methods and apparatuses for detecting mode hopping in a laser diode or other optical energy source in heat-assisted magnetic recording. An output power of the laser diode or other optical energy source is measured and the output power is differentiated over time to determine a rate of change. If it is determined that the rate of change exceeds a threshold value, a fault signal is asserted indicating a potential mode hopping event.
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公开(公告)号：US09318153B2
公开(公告)日：2016-04-19
申请号：US14230367
申请日：2014-03-31
Applicant: Seagate Technology LLC
Inventor： Jon D. Trantham , Robert Matousek , Todd M. Lammers
IPC: G11B5/02 , G11B11/00 , G11B27/36 , G11B13/08 , G11B13/04 , G11B11/105 , G11B5/48 , G11B5/31 , G11B5/60 , G11B5/00
CPC classification number: G11B27/36 , G11B5/314 , G11B5/4866 , G11B5/6088 , G11B11/10504 , G11B11/10506 , G11B13/04 , G11B13/08 , G11B2005/0021
Abstract: A data storage apparatus includes a controller capable of being coupled to a read/write head. The controller is configured to receive a fault signal from a sensor of the read/write head. The sensor indicates whether an energy source used to heat the recording medium is malfunctioning during a write operation. In response to the fault signal, the controller takes remedial action to protect the data associated with the write operation.
Abstract translation: 数据存储装置包括能够耦合到读/写头的控制器。 控制器被配置为从读/写头的传感器接收故障信号。 传感器指示在写入操作期间用于加热记录介质的能量源是否发生故障。 响应于故障信号，控制器采取补救措施来保护与写操作相关的数据。
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公开(公告)号：US20150279430A1
公开(公告)日：2015-10-01
申请号：US14230367
申请日：2014-03-31
Applicant: Seagate Technology LLC
Inventor： Jon D. Trantham , Robert Matousek , Todd M. Lammers
CPC classification number: G11B27/36 , G11B5/314 , G11B5/4866 , G11B5/6088 , G11B11/10504 , G11B11/10506 , G11B13/04 , G11B13/08 , G11B2005/0021
Abstract: A data storage apparatus includes a controller capable of being coupled to a read/write head. The controller is configured to receive a fault signal from a sensor of the read/write head. The sensor indicates whether an energy source used to heat the recording medium is malfunctioning during a write operation. In response to the fault signal, the controller takes remedial action to protect the data associated with the write operation.
Abstract translation: 数据存储装置包括能够耦合到读/写头的控制器。 控制器被配置为从读/写头的传感器接收故障信号。 传感器指示在写入操作期间用于加热记录介质的能量源是否发生故障。 响应于故障信号，控制器采取补救措施来保护与写操作相关的数据。
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Patent Agency Ranking
公开(公告)号：US09147431B2
公开(公告)日：2015-09-29
申请号：US13960443
申请日：2013-08-06
Applicant: Seagate Technology LLC
Inventor： Todd Michael Lammers , Robert Matousek , William Michael Radich
CPC classification number: G11B20/10268 , G11B5/556
Abstract: Method and apparatus for decoding data, such as from a rotatable magnetic recording medium. In accordance with some embodiments, a plurality of sensors is provided, with each sensor configured to generate a sense signal from an adjacent pattern. A processing circuit is configured to decode data from the adjacent pattern using the generated sense signals.
Abstract translation: 用于解码数据的方法和装置，例如从可旋转的磁记录介质。 根据一些实施例，提供多个传感器，其中每个传感器被配置为从相邻图案生成感测信号。 处理电路被配置为使用所产生的感测信号来解码来自相邻图案的数据。
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公开(公告)号：US20150043098A1
公开(公告)日：2015-02-12
申请号：US13960443
申请日：2013-08-06
Applicant: Seagate Technology LLC
Inventor： Todd Michael Lammers , Robert Matousek , William Michael Radich
IPC: G11B20/10
CPC classification number: G11B20/10268 , G11B5/556
Abstract: Method and apparatus for decoding data, such as from a rotatable magnetic recording medium. In accordance with some embodiments, a plurality of sensors is provided, with each sensor configured to generate a sense signal from an adjacent pattern. A processing circuit is configured to decode data from the adjacent pattern using the generated sense signals.
Abstract translation: 用于解码数据的方法和装置，例如从可旋转的磁记录介质。 根据一些实施例，提供多个传感器，其中每个传感器被配置为从相邻图案生成感测信号。 处理电路被配置为使用所产生的感测信号来解码来自相邻图案的数据。
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公开(公告)号：US08891340B2
公开(公告)日：2014-11-18
申请号：US14028343
申请日：2013-09-16
Applicant: Seagate Technology LLC
Inventor： Michael H. Lennard , Robert Matousek
CPC classification number: G11B13/04 , G11B5/02 , G11B2005/0021
Abstract: An apparatus and associated method is presently disclosed for a control circuitry capable of managing a heat source used in data storage applications. Various embodiments of the present invention are generally directed to a heat source directed at a data storage medium with a synchronization signal and a serial interface that are each selectively activated via a demultiplexed write gate signal. The selective activation allows for pulsed operation of the heat source resulting in reduced duty cycle and temperature during a write operation.
Abstract translation: 目前公开了一种用于能够管理数据存储应用中使用的热源的控制电路的装置和相关方法。 本发明的各种实施例通常涉及一种定向在数据存储介质上的热源，其具有通过解复用的写入门信号选择性地激活的同步信号和串行接口。 选择性激活允许热源的脉冲操作，从而在写入操作期间减少占空比和温度。
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公开(公告)号：US20140086034A1
公开(公告)日：2014-03-27
申请号：US13627731
申请日：2012-09-26
Applicant: SEAGATE TECHNOLOGY LLC
Inventor： Robert Matousek , Kevin David Powers , Dale Thomas Riley
IPC: G11B27/36
CPC classification number: G01B7/34 , G11B5/607 , G11B5/6076 , G11B27/36
Abstract: The present application discloses detecting an asperity on a storage media surface using two amplitude threshold crossings of an asperity detection signal within a preset timing window. The present application further discloses a temperature-dependent resistive asperity sensor and a preamplifier that correlates a resistance change at the asperity sensor within a preset timing window to detect an asperity on a storage media surface. The asperity may be one or both of a void in the storage media surface and a protrusion from the storage media surface.
Abstract translation: 本申请公开了使用预设定时窗口内的粗糙度检测信号的两个振幅阈值交叉来检测存储介质表面上的粗糙度。 本申请还公开了一种温度依赖性电阻粗糙度传感器和一个前置放大器，其将预定定时窗口内的凹凸传感器的电阻变化相关联，以检测存储介质表面上的粗糙度。 凹凸可以是存储介质表面中的空隙和来自存储介质表面的突起中的一个或两个。
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公开(公告)号：US20140036645A1
公开(公告)日：2014-02-06
申请号：US14028343
申请日：2013-09-16
Applicant: Seagate Technology LLC
Inventor： Michael H. Lennard , Robert Matousek
IPC: G11B13/04
CPC classification number: G11B13/04 , G11B5/02 , G11B2005/0021
Abstract: An apparatus and associated method is presently disclosed for a control circuitry capable of managing a heat source used in data storage applications. Various embodiments of the present invention are generally directed to a heat source directed at a data storage medium with a synchronization signal and a serial interface that are each selectively activated via a demultiplexed write gate signal. The selective activation allows for pulsed operation of the heat source resulting in reduced duty cycle and temperature during a write operation.
Abstract translation: 目前公开了一种用于能够管理数据存储应用中使用的热源的控制电路的装置和相关方法。 本发明的各种实施例通常涉及一种定向在数据存储介质上的热源，其具有通过解复用的写入门信号选择性地激活的同步信号和串行接口。 选择性激活允许热源的脉冲操作，从而在写入操作期间减少占空比和温度。
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