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1. 发明授权

US09275656B1 Disk drive with channel and preamp with dynamic write-current control for write head 有权
标题翻译：具有通道和前置放大器的磁盘驱动器，用于写入头的动态写入电流控制
公开(公告)号：US09275656B1
公开(公告)日：2016-03-01
申请号：US14804063
申请日：2015-07-20
申请人： HGST Netherlands B.V.
发明人： John Contreras , Samir Y. Garzon , Weldon Mark Hanson , Alexander Taratorin
IPC分类号： G11B5/09 , G11B20/10
CPC分类号： G11B5/09 , G11B5/02 , G11B20/10009 , G11B20/10018
摘要： Disk drives with a Channel System and Write Driver Preamp architecture that dynamically adjusts the write driver's signal wave-shape depending on the write data signal pattern are described. The wave-shape control signal is generated in the Channel and transmitted to the Write Driver Preamp. Embodiments of the invention provide discrete n-level overshoot amplitude control using amplitude-level modulated (AML) signal. One embodiment implements a look-ahead strategy overshoot amplitude control where the overshoot amplitude for each transition depends only on the subsequent (following) bits in the data stream and not on any previously recorded data.
摘要翻译：描述了具有通道系统和写入驱动器的磁盘驱动器根据写入数据信号模式动态地调整写入驱动器的信号波形的前置放大器架构。波形控制信号在通道中产生并发送到写驱动器前置放大器。本发明的实施例提供使用幅度电平调制（AML）信号的离散n级过冲幅度控制。一个实施例实现了先行策略超调幅度控制，其中每个转换的过冲幅度仅取决于数据流中的后续（后续）位，而不依赖于任何先前记录的数据。

2. 发明授权

US09025268B1 Cross-track interference testing of a hard disk drive 有权
标题翻译：硬盘驱动器的跨轨干扰测试
公开(公告)号：US09025268B1
公开(公告)日：2015-05-05
申请号：US14074361
申请日：2013-11-07
申请人： HGST Netherlands B.V.
发明人： Alexander Taratorin
IPC分类号： G11B5/09 , G11B20/18
CPC分类号： G11B20/182
摘要： Described herein is a method for testing an electronic information storage device having a read and write head includes writing a plurality of pattern periods along a single track of a magnetic recording medium of the electronic information storage device using the write head. The method also includes mapping read head signals for each pattern period across the single track and surrounding regions of the magnetic recording medium. Additionally, the method includes determining a condition of the electronic information storage device based on an average of the read head signals. The condition can include adjacent track degradation of the magnetic recording medium.
摘要翻译：本文描述了一种用于测试具有读写头的电子信息存储装置的方法，包括使用写入头沿着电子信息存储装置的磁记录介质的单个轨道写入多个模式周期。该方法还包括在磁记录介质的单个磁道和周围区域上映射每个图案周期的读取头信号。另外，该方法包括基于所读取的头信号的平均值来确定电子信息存储装置的状态。该条件可以包括磁记录介质的相邻磁道劣化。

3. 发明申请

US20170194024A1 IMPLEMENTING ENHANCED TRACK FOLLOWING DURING READ BACK USING HEAD ASYMMETRY METRICS IN HARD DISK DRIVES 有权
公开(公告)号：US20170194024A1
公开(公告)日：2017-07-06
申请号：US14988651
申请日：2016-01-05
申请人： HGST Netherlands B.V.
发明人： Richard Leo Galbraith , Weldon Mark Hanson , Mark A. Nichols , Alexander Taratorin , Roger William Wood
IPC分类号： G11B5/596
CPC分类号： G11B5/59683 , G11B5/59627
摘要： A method, apparatus, and system are provided for implementing track following using signal asymmetry metrics monitored during read back in hard disk drives (HDDs). Signal asymmetry metrics monitored during read back are used together with a position error signal (PES) to correct and guide the position of a read sensor with respect to a written track in the HDD.

4. 发明授权

US09218847B2 System and method for testing data storage systems utilizing micro-transitions 有权
标题翻译：使用微转换测试数据存储系统的系统和方法
公开(公告)号：US09218847B2
公开(公告)日：2015-12-22
申请号：US14132966
申请日：2013-12-18
申请人： HGST Netherlands B.V.
发明人： Weldon Mark Hanson , Michael Paul Salo , Alexander Taratorin , Roger William Wood
IPC分类号： G11B20/18 , G11B20/10
CPC分类号： G11B20/182 , G11B20/10398
摘要： A method of testing a one or more components of a data storage system introduces a first plurality of micro-transitions into a first data write pattern, which is then written to a magnetic media. A read-back signal is generated, and a frequency response of the read-back signal is analyzed to determine performance of the one or more components of the data storage system.
摘要翻译：测试数据存储系统的一个或多个组件的方法将第一多个微转换引入第一数据写入模式，然后将其写入磁性介质。生成回读信号，分析回读信号的频率响应，以确定数据存储系统的一个或多个组件的性能。

5. 发明授权

US08885275B1 System and method for ATI/FTI detection in magnetic media 有权
标题翻译：磁性介质中ATI / FTI检测的系统和方法
公开(公告)号：US08885275B1
公开(公告)日：2014-11-11
申请号：US14133075
申请日：2013-12-18
申请人： HGST Netherlands B.V.
发明人： Jing Lou , Alexander Taratorin
IPC分类号： G11B27/36 , G11B5/09
CPC分类号： G11B5/4555 , G11B5/09 , G11B20/10305
摘要： A system detects adjacent track interference (ATI)/far track interference (FTI) in a data storage system. The system includes a micro-transition generator that introduces micro-transitions into data write patterns written to a magnetic media. A spectrum analyzer analyzes in the frequency domain read-back signals generated in response to the data write patterns. In particular, the spectrum analyzer calculates first and second signal-to-noise ratios (SNRs) based on read-back signals generated before and after a center track stress test. Adjacent track interference/far track interference effects are determined based on the first and second SNR values.
摘要翻译：系统检测数据存储系统中的相邻轨道干扰（ATI）/远距离干扰（FTI）。该系统包括微转换发生器，其将微转换引入写入磁介质的数据写入模式。频谱分析仪分析响应于数据写入模式产生的频域读回信号。特别地，频谱分析仪基于在中心轨道应力测试之前和之后产生的回读信号来计算第一和第二信噪比（SNR）。基于第一和第二SNR值来确定相邻轨道干扰/远距离干扰效应。

6. 发明申请

US20150124346A1 CROSS-TRACK INTERFERENCE TESTING OF A HARD DISK DRIVE 有权
标题翻译：硬盘驱动器的跨轨道干扰测试
公开(公告)号：US20150124346A1
公开(公告)日：2015-05-07
申请号：US14074361
申请日：2013-11-07
申请人： HGST Netherlands B.V.
发明人： Alexander Taratorin
IPC分类号： G11B20/18
CPC分类号： G11B20/182
摘要： Described herein is a method for testing an electronic information storage device having a read and write head includes writing a plurality of pattern periods along a single track of a magnetic recording medium of the electronic information storage device using the write head. The method also includes mapping read head signals for each pattern period across the single track and surrounding regions of the magnetic recording medium. Additionally, the method includes determining a condition of the electronic information storage device based on an average of the read head signals. The condition can include adjacent track degradation of the magnetic recording medium.
摘要翻译：本文描述了一种用于测试具有读写头的电子信息存储装置的方法，包括使用写入头沿着电子信息存储装置的磁记录介质的单个轨道写入多个模式周期。该方法还包括在磁记录介质的单个磁道和周围区域上映射每个图案周期的读取头信号。另外，该方法包括基于所读取的头信号的平均值来确定电子信息存储装置的状态。该条件可以包括磁记录介质的相邻磁道劣化。

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