公开(公告)号：US06538835B1

公开(公告)日：2003-03-25

申请号：US09435319

申请日：1999-11-04

申请人： Matthew C. Burton

发明人： Matthew C. Burton

IPC分类号： G11B1512

CPC分类号： G11B5/5547

摘要： Apparatus and method for compensating for position signal distortion during a disc drive seek. A disc drive has first and second data recording surfaces on which tracks are defined, a moveable actuator which supports first and second magneto-resistive heads, and a servo circuit which applies current to an actuator motor to position the heads. During a seek in which the first head is moved from an initial track to a first destination track, upon loss of transduced servo data from the first data recording surface indicative of radial position of the head, the servo circuit switches from the first head to the second head and applies current to the actuator motor to move the second head to a known radial position with respect to the first destination track while transducing servo data from the second data recording surface. The servo circuit subsequently switches back to the first head to position the first head over the first destination track.

摘要翻译： 用于在盘驱动器寻找期间补偿位置信号失真的装置和方法。 磁盘驱动器具有第一和第二数据记录表面，轨道被定义在其上，支撑第一和第二磁阻头的可移动致动器以及向致动器马达施加电流以定位磁头的伺服电路。 在第一头从初始轨迹移动到第一目的地轨道的寻道期间，当从表示头部的径向位置的第一数据记录表面丢失转换的伺服数据时，伺服电路从第一头切换到 第二头，并且将电流施加到致动器电动机，以将第二头相对于第一目的地轨道移动到已知的径向位置，同时从第二数据记录表面传送伺服数据。 伺服电路随后切换回第一磁头，将第一磁头定位在第一目的磁道上。

公开(公告)号：US06473256B2

公开(公告)日：2002-10-29

申请号：US09212753

申请日：1998-12-16

申请人： Hae-Seok Cho ,  Indumini Ranmuthu

发明人： Hae-Seok Cho ,  Indumini Ranmuthu

IPC分类号： G11B1512

CPC分类号： G11B5/012 ,  G11B5/02 ,  G11B15/125 ,  G11B19/02 ,  G11B2005/0016

摘要： The present invention includes a circuit which can achieve a 200 nano second write to read time. The present invention eliminates a switch in the RMR measurement circuit.

摘要翻译： 本发明包括可实现200纳秒写入读取时间的电路。 本发明消除了RMR测量电路中的开关。

公开(公告)号：US06804076B2

公开(公告)日：2004-10-12

申请号：US09804177

申请日：2001-03-12

申请人： Munehisa Haitani

发明人： Munehisa Haitani

IPC分类号： G11B1512

CPC分类号： G01R31/31701

摘要： A method and a device enters a test mode in a floppy disk drive integrated circuit. The method and device includes a monitoring circuit and an integrated circuit having a selecting circuit. The selecting circuit selects a test-mode when a test mode command is received and a steady state voltage level is reached in a predetermined time period.

摘要翻译： 方法和设备在软盘驱动器集成电路中进入测试模式。 该方法和装置包括监视电路和具有选择电路的集成电路。 当接收到测试模式命令并且在预定时间段内达到稳态电压电平时，选择电路选择测试模式。

公开(公告)号：US06735034B1

公开(公告)日：2004-05-11

申请号：US09599176

申请日：2000-06-22

申请人： Ashish Manjrekar ,  Echere Iroaga ,  Bryan Bloodworth ,  Paul Merle Emerson

发明人： Ashish Manjrekar ,  Echere Iroaga ,  Bryan Bloodworth ,  Paul Merle Emerson

IPC分类号： G11B1512

CPC分类号： G11B20/10027 ,  G11B5/012 ,  G11B5/02 ,  G11B20/10009 ,  G11B2005/001 ,  G11B2005/0013

摘要： A method and circuit for selectively timing amplifier stages of a multi-stage reader amplifier for a hard disk drive system. The reader amplifier includes a first stage, second stage and third stage coupled in series. The method includes the steps of powering the first stage, delaying the enabling of the second stage, and delaying the enabling of the third stage, in order to reduce excursions on the third stage output signal. The circuit includes a logic circuit for successively enabling the second and third amplifier stages.

摘要翻译： 一种用于选择性地为硬盘驱动器系统的多级读取器放大器的放大器级定时的方法和电路。 阅读器放大器包括串联耦合的第一级，第二级和第三级。 该方法包括以下步骤：对第一级供电，延迟第二级的使能，并延迟第三级的使能，以减少第三级输出信号的偏移。 电路包括用于连续启用第二和第三放大器级的逻辑电路。

公开(公告)号：US06603621B1

公开(公告)日：2003-08-05

申请号：US09662038

申请日：2000-09-14

申请人： Yuhji Kigami ,  Takashi Kuroda ,  Masayuki Murakami

发明人： Yuhji Kigami ,  Takashi Kuroda ,  Masayuki Murakami

IPC分类号： G11B1512

CPC分类号： G06F3/061 ,  G06F3/064 ,  G06F3/0655 ,  G06F3/0676 ,  G11B20/10 ,  G11B20/1217

摘要： A system and method within a hard disk drive for transferring track sector information of a storage disk to a memory device. The system of the present invention includes a disk having multiple tracks, wherein each of the tracks includes at least one sector. The system further includes a memory device for storing sector identification data and user data. A drive data bus is utilized for transferring data between the storage disk and the memory. A controller is utilized to manages read and write operations to and from the storage disk, wherein the controller includes means for selecting either said user data or said sector identification data to be transferred to said memory device.

摘要翻译： 用于将存储盘的轨道扇区信息传送到存储设备的硬盘驱动器内的系统和方法。 本发明的系统包括具有多个磁道的磁盘，其中每个磁道包括至少一个扇区。 该系统还包括用于存储扇区标识数据和用户数据的存储器装置。 驱动数据总线用于在存储盘和存储器之间传送数据。 使用控制器来管理到存储盘和从存储盘的读取和写入操作，其中控制器包括用于选择要传送到所述存储器设备的所述用户数据或所述扇区标识数据的装置。

公开(公告)号：US06532126B1

公开(公告)日：2003-03-11

申请号：US09639211

申请日：2000-08-15

申请人： Hieu Van Nguyen ,  Clyde Everett Goodner, III

发明人： Hieu Van Nguyen ,  Clyde Everett Goodner, III

IPC分类号： G11B1512

CPC分类号： G11B5/02 ,  G11B5/012 ,  G11B5/40 ,  G11B15/12 ,  G11B15/125 ,  G11B2005/0018

摘要： An apparatus and method are disclosed for minimizing damage to a disc drive during head switching operations. The disc drive comprises a plurality of magnetic recording surfaces to and from which data are transferred using read/write heads, each head utilizing the application of a bias current during operation. To switch from a presently selected head to a target head, the disc drive determines a first value indicative of the magnitude of a bias current for the presently selected head and a target bias current to be applied to the target head. When the second value is greater than the first value, the disc drive switches from the presently selected head to the target head and then applies the target bias current; conversely, when the first value is greater than the second value, the target bias current is applied to the presently selected head and then the disc drive switches from the presently selected head to the target head.

摘要翻译： 公开了一种用于在磁头切换操作期间最小化对磁盘驱动器的损坏的装置和方法。 磁盘驱动器包括多个磁记录表面，从而从读数/写头读取/写入数据，每个磁头在运行期间利用偏置电流的应用。 为了从当前选择的头切换到目标头，盘驱动器确定指示当前选择的头的偏置电流的大小的第一值和要施加到目标头的目标偏置电流。 当第二值大于第一值时，盘驱动器从当前选择的头切换到目标头，然后施加目标偏置电流; 相反，当第一值大于第二值时，目标偏置电流被施加到当前选择的磁头，然后磁盘驱动器从当前选择的磁头切换到目标磁头。

公开(公告)号：US06449112B1

公开(公告)日：2002-09-10

申请号：US09416912

申请日：1999-10-13

申请人： Edgar Wursthorn ,  Jürgen Kaaden

发明人： Edgar Wursthorn ,  Jürgen Kaaden

IPC分类号： G11B1512

CPC分类号： G11B5/4992 ,  G11B5/4976

摘要： Tape recorder having a group of write heads which are arranged like a matrix in rows and columns, with each write head assigned in one row line and in one column line, and having a driver circuit for passing current through the row and column lines. A write head magnetizes a magnetic tape permanently only when its associated row and column lines have currents applied to them causing magnetic fields that reinforce one another in the magnetic tape. A common row return line is provided to which all the row lines are connected and a common column return line is provided to which all the column lines are connected.

摘要翻译： 磁带记录器具有一组写入头，其排列成行和列的矩阵，每个写入头分配在一行和一列，并且具有用于使电流通过行和列线的驱动电路。 只有当其相关联的行和列线具有施加到其上的电流时，写磁头永久地磁化磁带，导致在磁带中彼此加强的磁场。 提供了所有行线连接到的公共行返回线，并且提供了所有列线连接到的公共列返回线。

公开(公告)号：US06400520B1

公开(公告)日：2002-06-04

申请号：US09177161

申请日：1998-10-22

申请人： Joseph S. Stoutenburgh ,  Scott G. Sorrenson

发明人： Joseph S. Stoutenburgh ,  Scott G. Sorrenson

IPC分类号： G11B1512

CPC分类号： G11B5/486 ,  G11B5/012 ,  G11B20/10009

摘要： A data storage system and device is provided in which parasitic capacitance between multiple preamplifiers and a signal channel is minimized. Multiple read signals from multiple data heads are amplified by corresponding ones of the multiple preamplifiers. A connection device coupled to each of the multiple preamplifiers selectively electrically couples the amplified read signal from the active preamplifier to the signal channel, while electrically isolating the amplified read signals from the inactive preamplifiers from the signal channel. In addition, a method of coupling multiple preamplifiers to a signal channel is provided.

摘要翻译： 提供一种数据存储系统和装置，其中多个前置放大器和信号通道之间的寄生电容最小化。 来自多个数据头的多个读取信号被多个前置放大器中的相应的一个放大。 耦合到多个前置放大器中的每一个的连接装置选择性地电耦合来自有源前置放大器的放大的读取信号到信号通道，同时将放大的读取信号与不活动的前置放大器与信号通道电隔离。 另外，提供了一种将多个前置放大器耦合到信号通道的方法。

公开(公告)号：US06282051B1

公开(公告)日：2001-08-28

申请号：US09420889

申请日：1999-10-19

申请人： Thomas Robert Albrecht ,  Robert Carl Barrett ,  James Howard Eaton

发明人： Thomas Robert Albrecht ,  Robert Carl Barrett ,  James Howard Eaton

IPC分类号： G11B1512

CPC分类号： G11B5/584

摘要： A track following servo system is disclosed for use with magnetic tape systems in which magnetic servo track patterns contain transitions recorded at more than on azimuthal orientation across the width of the servo track. The timing of a signal derived from reading at any point across the width of such a pattern varies continuously as the read head is moved across the servo track. The pattern is read by a servo read head whose width is small compared to the servo track pattern. The combination of a wide servo pattern and a narrow servo read head offers excellent position sensing linearity and dynamic range. In the preferred embodiment, the servo read head is also narrow with respect to the data tracks, which provides the additional advantages of superior immunity to position sensing errors caused by defects or temporal variations in the servo read head, defects in the servo pattern on the tape, wear of the head or tape, or debris collection on the head or tape. Position sensing with this system is achieved by deriving a ratio of two servo pattern intervals and therefore is insensitive to tape speed during reading. The servo patterns may include spacing intervals recognizable for error detection and correction purposes. Servo tracks are recorded using a patterned multiple gap servo write head whose magnetic gaps have geometries appropriate to generate the desired servo patterns. The patterned gaps of the servo write head are produced by photolithographically defined electroplating of permalloy on a ferrite ring head structure.

摘要翻译： 磁带跟踪伺服系统被公开用于磁带系统，其中磁性伺服磁道模式包含跨过伺服磁道的宽度方向记录的转换。 在读取头跨过伺服轨迹移动时，在这种图案的宽度上的任何点处从读取得到的信号的定时不断变化。 通过与伺服磁道图形相比宽度小的伺服读取头来读取图案。 宽伺服模式和窄伺服读头的结合提供出色的位置检测线性度和动态范围。 在优选实施例中，伺服读取头相对于数据磁道也是窄的，这提供了对伺服读取头的缺陷或时间变化引起的位置检测错误的优异的抗扰性的额外优点， 胶带，头部或胶带的磨损，或在头部或胶带上的碎屑收集。 通过导出两个伺服模式间隔的比例来实现该系统的位置感测，因此在读取期间对磁带速度不敏感。 伺服模式可以包括可识别用于错误检测和校正目的的间隔间隔。 使用图案化的多间隙伺服写头来记录伺服磁道，其磁隙具有适于产生所需伺服模式的几何形状。 伺服写入头的图案化间隙通过光刻定义的坡莫合金电镀在铁氧体环头部结构上产生。

公开(公告)号：US06208480B1

公开(公告)日：2001-03-27

申请号：US09172693

申请日：1998-10-14

申请人： Stephen C. Tigner

发明人： Stephen C. Tigner

IPC分类号： G11B1512

CPC分类号： G11B5/59633 ,  G11B5/59655 ,  G11B2020/1234

摘要： A data storage apparatus is provided in which the multiple disc surfaces for a disc stack are divided into multiple rotationally spaced apart servo frames. Servo data is written on the multiple disc surfaces within radially extending servo spokes such that each disc surface includes one servo spoke within each servo frame. Within each particular servo frame the servo spokes on each of the multiple disc surfaces are offset rotationally from one another. In addition, servo control circuitry and a method of using the same to provide positional reference signals for the staggered servo format are disclosed.

摘要翻译： 提供了一种数据存储装置，其中盘堆叠的多个盘表面被分成多个旋转间隔开的伺服帧。 伺服数据被写在径向延伸的伺服轮辐中的多个盘表面上，使得每个盘表面在每个伺服框架内包括一个伺服轮辐。 在每个特定的伺服框架内，多个盘表面中的每一个上的伺服轮辐彼此旋转地偏移。 此外，公开了伺服控制电路及其使用方法来提供交错伺服格式的位置参考信号。