公开(公告)号：US20190006964A1

公开(公告)日：2019-01-03

申请号：US16004494

申请日：2018-06-11

申请人： Renesas Electronics Corporation

发明人： Minoru KUROSAWA ,  Seigi ISHIJI

IPC分类号： H02P3/12 ,  H02P7/025 ,  H02P7/29 ,  H02P7/293 ,  H02P29/68 ,  G11B19/20

CPC分类号： H02P3/12 ,  G11B5/54 ,  G11B15/46 ,  G11B19/2009 ,  G11B19/28 ,  H02P3/22 ,  H02P6/24 ,  H02P7/025 ,  H02P7/29 ,  H02P7/293 ,  H02P29/68 ,  H02P2205/01

摘要： A PWM modulation circuit controls low-side transistors of three phases (u, v, and w) all to be into an ON state, when a brake current flows, controls, in a period in which a brake current flows in one phase, a transistor for sensing (u, v, and w) of this one phase to be into an ON state, and controls, in a period of two phases, the transistor for sensing (u, v, and w) of three phases to be into an OFF state. When the brake current is to flow, sense-phase control circuits of three phases controls a transistor for sensing (u, v, and w), in a phase in which the brake current is in a sink direction, to be into an ON state, and controls the transistor for sensing (u, v, and w) in a phase in which it is in an opposite direction, to be into an OFF state.

公开(公告)号：US09734847B1

公开(公告)日：2017-08-15

申请号：US15063696

申请日：2016-03-08

申请人： Western Digital (Fremont), LLC

发明人： Paul Dylan Sherman ,  Tuyetanh Thi Dang

IPC分类号： G11B5/09 ,  G11B20/10 ,  G11B5/455 ,  G11B27/36 ,  G11B5/54 ,  G11B5/012 ,  G11B5/60

CPC分类号： G11B5/6076 ,  G11B5/012 ,  G11B5/09 ,  G11B5/455 ,  G11B5/54 ,  G11B5/6005 ,  G11B20/10027 ,  G11B20/10037 ,  G11B27/36

摘要： A data storage device is disclosed comprising a disk, a head for accessing the disk, and a sensor for generating an alternating sensor signal. The sensor is disconnected from an input of a sensing circuit and while the sensor is disconnected an alternating calibration signal is injected into the input of the sensing circuit, wherein the alternating calibration signal comprises a predetermined offset and amplitude. A response of the sensing circuit to the alternating calibration signal is evaluated to detect at least one of an offset and a gain of the sensing circuit.

公开(公告)号：US09405467B2

公开(公告)日：2016-08-02

申请号：US14063509

申请日：2013-10-25

申请人： Seagate Technology LLC

发明人： Aigang Feng ,  FongKheon Chong ,  MyintNgwe Maung ,  SienHuay Chong ,  James Joseph Touchton ,  Abhay T. Kataria ,  Haejung Lee ,  Taesik Kang

IPC分类号： G06F3/06

CPC分类号： G11B5/5526 ,  G06F3/06 ,  G06F3/0601 ,  G06F3/0676 ,  G06F2003/0695 ,  G11B5/012 ,  G11B5/09 ,  G11B5/54 ,  G11B5/5521 ,  G11B5/59633 ,  G11B20/1217 ,  G11B20/1258 ,  G11B20/1889 ,  G11B21/12

摘要： An adaptive guard band for a ramp load/unload device is disclosed to provide extended data storage. In illustrated embodiments, an adaptive guard band algorithm is configured to format one or more discs or media having a lower capacity device with the adaptive guard band and extended data zone utilizing capacity measurements. The algorithm formats the media to provide a track zero at a first cylinder if the capacity is at or above the threshold capacity and a second cylinder if the capacity is below the threshold capacity to provide the extended data storage zone. A size or width of the extended data zone is variable to provide additional capacity to meet the threshold capacity.

摘要翻译： 公开了用于斜坡加载/卸载装置的自适应保护带，以提供扩展数据存储。 在所示实施例中，自适应保护带算法被配置为利用容量测量来格式化具有较低容量设备的一个或多个盘或介质与自适应保护带和扩展数据区。 如果容量等于或高于阈值容量，则算法将媒体格式化为在第一气缸处提供磁道零，如果容量低于阈值容量以提供扩展数据存储区，则该第二气缸。 扩展数据区的大小或宽度是可变的，以提供满足阈值容量的额外容量。

公开(公告)号：US09390749B2

公开(公告)日：2016-07-12

申请号：US14792798

申请日：2015-07-07

申请人： Western Digital Technologies, Inc.

发明人： Timothy A. Ferris ,  Robert P. Ryan

IPC分类号： G11B19/04 ,  G11B19/20 ,  H02P3/14 ,  H02P25/02

CPC分类号： G11B19/047 ,  G11B5/54 ,  G11B19/20 ,  H02P3/14 ,  H02P25/028

摘要： A disk drive is disclosed comprising a disk, a spindle motor operable to rotate the disk, a head actuated over the disk, an interface operable to receive a host supply voltage, and a capacitor. The host supply voltage is used to charge the capacitor to a capacitor voltage higher than the host supply voltage. During a power failure, the host supply voltage stops charging the capacitor, and a motor supply voltage is generated from the spindle motor. The capacitor voltage is used to operate control circuitry, and when the capacitor voltage decays below the motor supply voltage, the motor supply voltage charges the capacitor.

摘要翻译： 公开了一种磁盘驱动器，其包括盘，可操作以旋转盘的主轴马达，在盘上致动的头，可操作以接收主机电源电压的接口和电容器。 主电源电压用于将电容器充电到高于主机电源电压的电容器电压。 在电源故障期间，主机电源电压停止对电容器充电，并且主轴电机产生电机电源电压。 电容电压用于操作控制电路，当电容电压降到低于电机电源电压时，电机电源电压对电容充电。

公开(公告)号：US09183862B1

公开(公告)日：2015-11-10

申请号：US14548232

申请日：2014-11-19

申请人： HGST Netherlands B.V.

发明人： Anant Shah ,  Thomas Tamayo

IPC分类号： G11B5/54

CPC分类号： G11B5/4806 ,  G11B5/54

摘要： A load/unload ramp configured for a multiple disk-stack, shared actuator hard disk drive (HDD) includes two ramp parts configured to swivel-engage together. Each of the two ramp parts may have a sleeve configured for positioning over a swivel pin and a locking pin configured for positioning and movement within a corresponding receptacle constituent to an HDD base. Thus, each ramp part can be positioned to a respective initial locking position onto the base, a first disk stack installed, a first ramp part swiveled to a final locking position engaged with the first disk stack, and fixed to the base. Then an actuator assembly can be inserted and the corresponding actuator arms parked onto the first ramp part, a second disk stack installed, then the second ramp part swiveled to its final locking position engaged with the second disk stack, and fixed to the base.

摘要翻译： 配置为多个磁盘堆栈，共享执行器硬盘驱动器（HDD）的加载/卸载斜坡包括两个配置为旋转接合在一起的斜坡部件。 两个斜坡部分中的每一个可以具有构造成用于定位在旋转销上的套筒和构造成用于在相应的容器构件内定位和移动到HDD基座的锁定销。 因此，每个斜坡部分可以被定位到相应的初始锁定位置到基座上，安装第一盘堆叠，第一斜坡部分旋转到与第一盘堆叠接合的最终锁定位置并固定到基座。 然后可以将致动器组件插入并且相应的致动器臂停放在第一斜坡部分上，安装第二盘堆叠，然后第二斜坡部分旋转到其与第二盘堆叠接合的最终锁定位置，并固定到基座。

公开(公告)号：US09064516B2

公开(公告)日：2015-06-23

申请号：US14539712

申请日：2014-11-12

申请人： NHK SPRING CO., LTD.

发明人： Hajime Arai ,  Futa Sasaki

IPC分类号： G11B5/54

CPC分类号： G11B5/54 ,  G11B5/455 ,  G11B5/4853 ,  G11B5/486

摘要： A flexure tail is provided in a flexure including a metal base and a conductive circuit portion. The flexure tail includes a tail pad portion. In the tail pad portion, tail electrodes to are arranged. At the tail pad portion, a stub which remains after a test pad portion is cut off is formed. The stub includes conductors to which are left uncut. The conductors to which are left uncut are electrically connected to the tail electrodes to, respectively. The stub includes a bent portion. The bent portion is formed by bending a frame portion of the tail pad portion, and forms an angle of 30° or more with respect to a circuit board. The tail electrodes to are joined to terminals to of the circuit board.

摘要翻译： 弯曲尾部设置在包括金属基底和导电电路部分的挠曲部中。 弯曲尾部包括尾巴部分。 在尾垫部分中，布置有尾电极。 在尾垫部分，形成了在试验垫部分被切断之后残留的短截线。 短棒包括未切割的导体。 未切割的导体分别电连接到尾电极。 短截线包括弯曲部分。 弯曲部分通过弯曲尾板部分的框架部分而形成，并且相对于电路板形成30°或更大的角度。 尾电极连接到电路板的端子。

公开(公告)号：US09053729B1

公开(公告)日：2015-06-09

申请号：US14338485

申请日：2014-07-23

申请人： SEAGATE TECHNOLOGY LLC

发明人： Vijay Kumar ,  Ravishankar A. Shivarama

IPC分类号： G11B21/02 ,  G11B27/36 ,  G11B5/60 ,  G11B5/54

CPC分类号： G11B5/6011 ,  G11B5/54 ,  G11B5/6058 ,  G11B5/607 ,  G11B5/6076

摘要： Various embodiments of a method of detecting a contact event between a head and a storage medium, and a storage device that utilizes such method are disclosed. In one or more embodiments, the method includes applying an input signal to an actuator of a head of a storage device; identifying a frequency of the input signal; detecting an output signal in response to the input signal; and detecting a contact event between the head and a storage medium of the storage device if the output signal includes an even harmonic frequency and an odd harmonic frequency of the frequency of the input signal.

摘要翻译： 公开了检测头与存储介质之间的接触事件的方法以及利用这种方法的存储装置的各种实施例。 在一个或多个实施例中，该方法包括将输入信号施加到存储装置的头部的致动器; 识别输入信号的频率; 响应于所述输入信号检测输出信号; 以及如果所述输出信号包括所述输入信号的频率的偶次谐波频率和奇数谐波频率，则检测所述存储设备的磁头与存储介质之间的接触事件。

公开(公告)号：US08970977B1

公开(公告)日：2015-03-03

申请号：US13631588

申请日：2012-09-28

申请人： Western Digital Technologies, Inc.

发明人： John R. Agness ,  Mingying Gu

IPC分类号： G11B5/54 ,  G11B19/28

CPC分类号： G11B5/54 ,  G11B19/28 ,  G11B21/12

摘要： A disk drive is disclosed comprising a head actuated over a disk, a spindle motor operable to rotate the disk, and a ramp near an outer periphery of the disk. When an emergency condition is detected, the head is unloaded onto the ramp, and failure analysis data identifying a cause of the emergency condition is logged.

摘要翻译： 公开了一种磁盘驱动器，其包括在盘上致动的磁头，可操作以旋转磁盘的主轴电机和在盘的外周附近的斜坡。 当检测到紧急情况时，头部被卸载到斜坡上，并记录识别紧急情况的原因的故障分析数据。

公开(公告)号：US08873193B2

公开(公告)日：2014-10-28

申请号：US14013968

申请日：2013-08-29

申请人： STMicroelectronics S.r.l.

发明人： Ezio Galbiati

IPC分类号： G11B21/02 ,  G11B21/12 ,  H02P6/18 ,  G11B5/54 ,  H02P25/02 ,  G11B19/20 ,  H02P6/24

CPC分类号： G11B19/2063 ,  G11B5/54 ,  G11B21/12 ,  H02P6/182 ,  H02P6/24 ,  H02P25/028 ,  H02P25/034

摘要： A control circuit of a voice coil motor is configured to move at least one read/write head of an hard disk into a parking position. The control circuit compares a received supply signal with a reference signal having a minimum value and a maximum value and a frequency. When the value of the supply signal is between the minimum value and the maximum value of the reference signal, the controller causes alternation of a working condition of the voice coil motor, when the value of said supply signal is higher than the value of the reference signal, and of a stop condition of the voice coil motor, when the value of said supply signal is lower than the value of the reference signal, with a frequency equal to the frequency of said reference signal.

摘要翻译： 音圈电机的控制电路被配置为将至少一个硬盘的读/写头移动到停放位置。 控制电路将接收到的电源信号与具有最小值和最大值和频率的参考信号进行比较。 当供给信号的值在参考信号的最小值和最大值之间时，当所述供给信号的值高于参考值时，控制器使音圈马达的工作状态发生变化 信号和音圈电动机的停止状态，当所述电源信号的值低于参考信号的值时，其频率等于所述参考信号的频率。

公开(公告)号：US20140146414A1

公开(公告)日：2014-05-29

申请号：US14171699

申请日：2014-02-03

申请人： Sigma Pro Ltd. LLC

发明人： Tyson York Winarski

IPC分类号： G11B5/54

CPC分类号： G11B5/65 ,  B82Y10/00 ,  G11B5/54 ,  G11B5/706 ,  Y10S977/742 ,  Y10S977/773

摘要： A magnetic storage medium is formed of magnetic nanoparticles that are encapsulated within nanotubes (e.g., carbon nanotubes), which are arranged in a substrate to facilitate the reading and writing of information by a read/write head. The substrate may be flexible or rigid. Information is stored on the magnetic nanoparticles via the read/write head of a storage device. These magnetic nanoparticles are arranged into data tracks to store information through encapsulation within the carbon nanotubes. As carbon nanotubes are bendable, the carbon nanotubes may be arranged on flexible or rigid substrates, such as a polymer tape or disk for flexible media, or a glass substrate for rigid disk. A polymer may assist holding the nanoparticle-filled carbon tubes to the substrate.

摘要翻译： 磁性存储介质由包封在纳米管（例如碳纳米管）内的磁性纳米颗粒形成，其被布置在基板中以便于读/写头读取和写入信息。 衬底可以是柔性的或刚性的。 信息经由存储装置的读/写头存储在磁性纳米粒子上。 这些磁性纳米颗粒被布置成数据轨道，以通过在碳纳米管内的封装来存储信息。 由于碳纳米管是可弯曲的，碳纳米管可以布置在柔性或刚性基底上，例如用于柔性介质的聚合物带或盘，或用于刚性盘的玻璃基底。 聚合物可以有助于将纳米颗粒填充的碳管保持在基底上。