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1. 发明申请

WO01026099A1 LOW IMPEDANCE HEAD/PREAMPLIFIER CHIP POSITION IN A DISK DRIVE 审中-公开
标题翻译：磁盘驱动器中的低阻抗头/前置器芯片位置
公开(公告)号：WO01026099A1
公开(公告)日：2001-04-12
申请号：PCT/US2000/027625
申请日：2000-10-05
IPC分类号： G11B5/016 , G11B5/48 , G11B5/55 , G11B5/596
CPC分类号： G11B5/4813 , G11B5/016 , G11B5/4826 , G11B5/4833 , G11B5/553 , G11B5/59677
摘要： A disk drive system includes a base, a disk rotatably attached to the base, and an actuator assembly pivotally attached to the base. The actuator assembly moves the transducer to selected areas of the disk where information representative of data is to be written or read. The actuator assembly maintains the transducer in a transducing relationship with the disk. The actuator assembly includes an arm and a head gimbal assembly. The head gimbal assembly includes a suspension. The arm has a length from the point where it pivots to the end of the arm. The arm and suspension can be thought of as having a fixed length for a certain sized disk drive. The length of the arm is greater than 4.0 times the lenght of the suspension. The ratio of the length of the arm to the length of the suspension is in the range of 4.0 to 20.0. The arm is made of a material with a stiffness-to-mass ratio in the range of 6.0 to 20.0 x 10 m. The resulting actuator arm is long and stable and the suspension is short so that the signal processing preamplifier chip attached to the arm near the end carrying the transducer is 8 mm or less from the head transducer. The material of the arm conducts heat away from the chip by moving it from the preamplifier chip to the surface of the arm in the airstream between the disk and the arm. The suspension includes signal-carrying wires which electrically connect the transducer to the preamplifier chip which have a length in the range of 4mm to 12mm.
摘要翻译：磁盘驱动器系统包括基座，可旋转地附接到基座的盘，以及可枢转地附接到基座的致动器组件。致动器组件将换能器移动到盘的选定区域，其中代表数据的信息将被写入或读取。致动器组件将换能器保持与盘的传递关系。致动器组件包括臂和头万向架组件。头部万向节组件包括悬架。手臂具有从其枢转到手臂末端的点的长度。手臂和悬架可以被认为具有固定长度以用于特定尺寸的磁盘驱动器。手臂的长度大于悬挂长度的4.0倍。臂的长度与悬浮液的长度之比在4.0至20.0的范围内。臂由硬度与质量比在6.0至20.0×10 6 m范围内的材料制成。所产生的执行机构臂长而稳定，悬架较短，因此附着在靠近传感器端部的臂上的信号处理前置放大器芯片与头部传感器相距8 mm或更小。臂的材料通过将其从前置放大器芯片移动到在盘和臂之间的气流中的臂的表面而将热量从芯片传导出去。悬架包括将换能器电连接到前置放大器芯片的信号承载线，前置放大器芯片的长度在4mm至12mm的范围内。

2. 发明申请

WO99023644A1 CHIP ON ACTUATOR ARM OF A DISK DRIVE 审中-公开
标题翻译：芯片驱动器驱动器ARM
公开(公告)号：WO99023644A1
公开(公告)日：1999-05-14
申请号：PCT/US1998/022137
申请日：1998-10-20
IPC分类号： G11B5/016 , G11B5/48 , G11B5/55 , G11B5/596
CPC分类号： G11B5/553 , G11B5/016 , G11B5/4813 , G11B5/4833 , G11B5/59677
摘要： A disk drive system includes a base, a disk rotatably attached to the base, and an actuator assembly movably attached to the base. The actuator assembly (134) moves the transducer (136) to selected areas of the disk where information representative of data is to be written or read. The actuator assembly maintains the transducer in a transducing relationship with the disk. The first embodiment of the actuator assembly also includes an arm which has a first layer of material including a plurality of elongated fibers orientated in a first direction, and a second layer of material including a plurality of elongated fibers orientated in a second direction. The first and second layers are part of a composite material. The second embodiment of the actuator assembly also includes an arm made of a ceramic material. The transducer (136) is attached to said arm. The resulting actuator arm is long and stable. A preamplifier chip (600) is attached to the arm (134) near the end carrying the transducer (136). The material of the arm (134) is able to conduct heat away from the arm by moving it from the preamplifier chip (600) to the surface of the arm in the airstream between the disk and the arm. The arm may also include signal-carrying wires (600) which are positioned between the layers of the composite arm and heat conductive fibers to remove heat from a heat producing source, such as from a chip on the arm.
摘要翻译：磁盘驱动器系统包括基座，可旋转地附接到基座的盘，以及可移动地附接到基座的致动器组件。致动器组件（134）将换能器（136）移动到盘的选择区域，其中代表数据的信息要被写入或读取。致动器组件将换能器保持与盘的换能关系。致动器组件的第一实施例还包括臂，其具有包括沿第一方向定向的多个细长纤维的第一材料层和包括沿第二方向定向的多个细长纤维的第二材料层。第一层和第二层是复合材料的一部分。致动器组件的第二实施例还包括由陶瓷材料制成的臂。传感器（136）附接到所述臂。所得到的执行器臂长而稳定。前置放大器芯片（600）在承载换能器（136）的端部附近附接到臂（134）。臂（134）的材料能够通过将其从前置放大器芯片600移动到在盘和臂之间的空气流中的臂的表面而将热量从臂传导出去。臂还可以包括位于复合臂的层之间的信号承载线（600）和导热纤维，以从诸如从臂上的芯片的发热源移除热量。

3. 发明申请

WO9856108A3 AUTOMATIC GAIN CONTROL CIRCUIT, E.G. FOR USE IN A HARD DISK DRIVE 审中-公开
标题翻译：自动增益控制电路用于硬盘驱动器
公开(公告)号：WO9856108A3
公开(公告)日：1999-03-25
申请号：PCT/IB9800675
申请日：1998-05-07
申请人： KONINKL PHILIPS ELECTRONICS NV , PHILIPS SVENSKA AB
发明人： VOORMAN JOHANNES OTTO , RAMALHO JOAO NUNO VILA LOBOS
IPC分类号： G11B20/10 , G11B5/55 , G11B5/596 , G11B20/18 , G11B20/24 , G11B21/08 , G11B21/10 , H03G3/20 , H03G3/30 , H03K5/1532
CPC分类号： H03G3/30 , G11B5/553 , G11B5/59622 , G11B20/18 , G11B20/24 , G11B21/083 , G11B21/106
摘要： An automatic gain control circuit is disclosed for amplifying an input signal so that it has a specific correspondence with a reference value (Vref). The circuit comprises an input terminal (2) for receiving the input signal, a variable gain amplifier unit (4) for amplifying said input signal in response to a gain control signal. A peak detector unit (14) is provided for detecting peaks in said amplified input signal. The peak detector unit (14) has an attack time constant (Ta) and a decay time constant (Td), so as to supply a peak detector output signal (Vp) which is representative of the amplitude of the peaks in said amplified input signal. Further, a comparator unit (20) is provided for comparing the peak detector output signal (Vp) with said reference value (Vref) so as to derive an error signal (e) therefrom. An integrator unit (30) is further present for integrating the error signal (e) so as to obtain said gain control signal. The peak detector circuit comprises means for controlling said decay time constant in response to said error signal, said means for controlling said decay time constant being adapted to decrease said decay time constant for increasing error signals, in a situation when the peak detector output signal (Vp) is larger than said reference value (Vref). Further, the following relationship is maintained between the attack time constant Td and the decay time constant T4 of the peak detector means: Td = c.Ta , where c is a positive constant and p is a constant larger than 1. p is preferably equal to 2 and for c holds 20
摘要翻译：公开了一种用于放大输入信号以使其与参考值（Vref）具有特定对应关系的自动增益控制电路。电路包括用于接收输入信号的输入端（2），用于响应于增益控制信号放大所述输入信号的可变增益放大器单元（4）。提供峰值检测器单元（14），用于检测所述放大的输入信号中的峰值。峰值检测器单元（14）具有发射时间常数（Ta）和衰减时间常数（Td），从而提供表示所述放大输入信号中的峰值振幅的峰值检测器输出信号（Vp）。此外，提供比较器单元（20），用于将峰值检测器输出信号（Vp）与所述参考值（Vref）进行比较，从而从其导出误差信号（e）。还存在积分器单元（30），用于积分误差信号（e）以获得所述增益控制信号。峰值检测器电路包括用于响应于所述误差信号控制所述衰减时间常数的装置，所述用于控制所述衰减时间常数的装置适于减小所述衰减时间常数以增加误差信号，在峰值检测器输出信号（ Vp）大于所述参考值（Vref）。此外，在峰值检测器装置的攻击时间常数Td和衰减时间常数T4之间保持以下关系：Td = c.Ta，其中c是正常数，p是大于1的常数p 优选等于2，对于c保持20

4. 发明申请

WO00011663A1 SYSTEM AND METHOD FOR EXTENDING THE OPERATING LIFE OF A MAGNETORESISTIVE TRANSDUCER PROVIDED IN A DISK DRIVE SYSTEM 审中-公开
标题翻译：用于扩展磁盘驱动系统中提供的磁传感器的操作寿命的系统和方法
公开(公告)号：WO00011663A1
公开(公告)日：2000-03-02
申请号：PCT/US1998/026839
申请日：1998-12-17
IPC分类号： G11B5/00 , G11B5/55 , G11B5/596 , G11B15/12 , G11B19/04 , G11B5/39
CPC分类号： G11B5/59683 , G11B5/553 , G11B5/596 , G11B15/125 , G11B19/04 , G11B2005/0016
摘要： An apparatus and method for extending the service life of an MR element (157) incorporated in a read/write head (156) involves detecting periods of disk drive system inactivity and selectively switching between the heads (156) for purposes of reading servo information during the inactive periods. Selecting between heads (156) may involve selecting (260) a head (156) having a minimum of usage, such as a head (156) having an MR element (157) with a minimum of cumulative operational time or energy dissipation relative to other MR elements (157) provided in the disk drive system (20). Reducing the servo sampling rate (320) during a period of system (20) inactivity. The MR elements (307) may be selectively activated during idle periods so as to further reduce usage of the MR elements (307).
摘要翻译：用于延长结合在读/写头（156）中的MR元件（157）的使用寿命的装置和方法涉及检测磁盘驱动系统不活动的周期，并且在磁头（156）之间选择性地切换以便在伺服信息期间读取伺服信息非活动期。在头部（156）之间的选择可以包括选择（260）具有最小使用量的头部（156），例如具有MR元件（157）的头部（156），其具有相对于其他的最小累积操作时间或能量耗散设置在磁盘驱动系统（20）中的MR元件（157）。在系统（20）不活动期间减少伺服采样率（320）。可以在空闲周期期间选择性地激活MR元件（307），以便进一步减少MR元件（307）的使用。

5. 发明申请

WO99009544A1 DISK DRIVE ACTUATOR USING FIBER COMPOSITE MATERIAL 审中-公开
标题翻译：使用纤维复合材料的磁盘驱动器执行器
公开(公告)号：WO99009544A1
公开(公告)日：1999-02-25
申请号：PCT/US1998/016963
申请日：1998-08-14
IPC分类号： G11B5/48 , G11B5/55 , G11B21/02 , G11B21/08 , G11B21/16 , G11B21/18
CPC分类号： G11B21/16 , G11B5/4833 , G11B5/486 , G11B5/553 , G11B5/5582 , G11B21/02 , G11B21/08 , G11B21/18
摘要： A disk drive system includes a base, a disk rotatably attached to the base, and an actuator assembly movably attached to the base. The actuator assembly moves the transducer to selected areas of the disk where information representative of data is to be written or read. The actuator assembly maintains the transducer in a transducing relationship with the disk. The actuator assembly also includes an arm which has a first layer of material including a plurality of elongated fibers orientated in a first direction, and a second layer of material including a plurality of elongated fibers orientated in a second direction. The first and second layers are part of a composite material. The transducer is attached to said arm. The resulting actuator arm has a resonant frequency that can be varied or moved or shifted by varying the direction of the elongated fibers in the second layer with respect to the direction of the elongated fibers in the first layer. The resonant frequency is varied so that it is at a different frequency than the resonant frequency peaks associated with the other components of the disk drive, such as the resonance frequency of the disk or disks of the drive and the head suspension assembly (HSA). The arm may also include signal-carrying wires which are positioned between the layers of the composite arm and heat conductive fibers to remove heat from a heat producing source, such as from a chip on the arm.
摘要翻译：磁盘驱动器系统包括基座，可旋转地附接到基座的盘，以及可移动地附接到基座的致动器组件。致动器组件将换能器移动到盘的选定区域，其中代表数据的信息将被写入或读取。致动器组件将换能器保持与盘的换能关系。所述致动器组件还包括臂，所述臂具有包括沿第一方向定向的多个细长纤维的第一材料层和包括沿第二方向定向的多个细长纤维的第二材料层。第一层和第二层是复合材料的一部分。传感器连接到所述臂。所产生的致动器臂具有通过相对于第一层中的细长纤维的方向改变第二层中的细长纤维的方向而可以改变或移动或移动的共振频率。谐振频率是变化的，使得其处于与盘驱动器的其他部件相关联的谐振频率峰值的不同频率，例如驱动器的磁盘或磁盘悬架组件（HSA）的共振频率。臂还可以包括位于复合臂的层之间的信号承载线和导热纤维，以从发热源例如从臂上的芯片移除热量。

6. 发明申请

WO9620472A2 SYSTEM AND METHOD FOR ENCODING A SERVO ADDRESS 审中-公开
标题翻译：用于编码伺服地址的系统和方法
公开(公告)号：WO9620472A2
公开(公告)日：1996-07-04
申请号：PCT/EP9504788
申请日：1995-12-06
申请人： IBM
发明人： GREENBERG RICHARD , PURKETT JOHN C
IPC分类号： G11B21/10 , G11B5/48 , G11B5/55 , G11B5/596 , G11B7/007 , G11B20/12 , G11B21/00 , G11B21/08 , G11B27/10 , G11B27/30
CPC分类号： G11B20/1252 , G11B5/4886 , G11B5/553 , G11B5/59655 , G11B7/00745 , G11B20/1217 , G11B21/00 , G11B27/105 , G11B27/3027 , G11B2020/1234 , G11B2220/20
摘要： A servo address is encoded in a disk drive system having at least one disk for storing data. A servo address associated with a sector in a track, or cylinder, on a surface of a disk and comprised of a sector number, a track number, and in multiple disk systems, a head number is encoded into the encoded servo address. Encoding the servo address saves disk storage space because the encoded servo address uses fewer bits than a conventional servo address while still enabling the disk drive system to locate positions on the disk.
摘要翻译：伺服地址在具有至少一个用于存储数据的磁盘的磁盘驱动器系统中被编码。一个伺服地址与一个磁盘表面上的一个磁道或圆柱体中的一个扇区相关联，并且由一个扇区号，一个磁道号和多个磁盘系统组成，一个磁头号被编码到编码的伺服地址中。对伺服地址进行编码可节省磁盘存储空间，因为编码后的伺服地址使用的位数少于传统的伺服地址，同时仍然使磁盘驱动器系统能够定位磁盘上的位置。

7. 发明申请

WO1990003644A1 FAULT TOLERANT INDEX PATTERNS AND DECODING MEANS 审中-公开
标题翻译：错误的索引模式和解码方式
公开(公告)号：WO1990003644A1
公开(公告)日：1990-04-05
申请号：PCT/US1989004124
申请日：1989-09-20
申请人： MAXTOR CORPORATION
发明人： MAXTOR CORPORATION , WILSON, Rosser, S.
IPC分类号： G11B21/10
CPC分类号： G11B5/553 , G11B5/59633 , G11B21/081 , G11B27/3027
摘要： A fault tolerant servo index scheme (21) is described. The servo pattern (22, 23, 24) of the preferred embodiment is a twelve bit pattern chosen to limit the side lobes (5) of an autocorrelation plot of the pattern with a template (37) of the pattern. In this manner a greater number of errors can be tolerated while still permitting index identification. Initially, the entire servo pattern (22, 23, 24) on a servo track (26) (27) is detected in sequence at the bit rate. Each twelve bit sequence is compared (38) to a template (37) of the servo pattern (22, 23, 24), and the number of bits whose position and value (''1'' or ''0'') match the template (37) are determined. Whenever a threshold level (40), (less than the total number of bits in the pattern), of ''hits'' takes place it is assumed that the index has been detected. By minimizing the magnitude of the side lobes (5) of the correlation plot, the threshold can be set somewhere between complete correlation and the side lobe (5) number.

8. 发明申请

WO2015047730A1 METHOD AND APPARATUS FOR DETERMINING POSITION OF MULTIPLE DRIVE HEADS 审中-公开
标题翻译：用于确定多个驱动头的位置的方法和装置
公开(公告)号：WO2015047730A1
公开(公告)日：2015-04-02
申请号：PCT/US2014/054964
申请日：2014-09-10
申请人： MARVELL WORLD TRADE LTD. , OBERG, Mats , ZOU, Qiyue , BURD, Gregory
发明人： OBERG, Mats , ZOU, Qiyue , BURD, Gregory
IPC分类号： G11B5/596 , G11B5/48 , G11B5/55
CPC分类号： G11B5/59627 , G11B5/4886 , G11B5/553 , G11B5/59683
摘要： Determining the radial position of a first read head of a storage device includes reading servo data from a storage media platter surface using the first read head, deriving from that servo data a first position error signal representing a first estimate of the radial position of the first read head, reading the servo data from the storage media platter surface using a different read head, deriving from that servo data a second position error signal representing an estimate of the radial position of the different read head, and combining the first estimate of the radial position of the first read head and the estimate of the radial position of the different read head to obtain a revised estimate of the radial position of the first read head. The combining could include taking account of a known positional offset between the first read head and the different read head.
摘要翻译：确定存储设备的第一读取头的径向位置包括使用第一读取头从存储介质盘表面读取伺服数据，从该伺服数据中导出第一位置误差信号，该第一位置误差信号表示第一读取头的径向位置的第一估计读取头，使用不同的读取头从存储介质盘表面读取伺服数据，从该伺服数据导出表示不同读取头的径向位置的估计的第二位置误差信号，以及组合径向的第一估计第一读取头的位置和不同读取头的径向位置的估计，以获得第一读取头的径向位置的修正估计。组合可以包括考虑在第一读头和不同读头之间已知的位置偏移。

9. 发明申请

WO2011017441A1 DEFLECTION REFERENCE ADJUSTMENT FOR VARIABLE TRACK PITCH MEDIA 审中-公开
标题翻译：用于可变轨迹倾斜介质的偏移参考调整
公开(公告)号：WO2011017441A1
公开(公告)日：2011-02-10
申请号：PCT/US2010/044433
申请日：2010-08-04
申请人： DOUG CARSON & ASSOCIATES, INC. , CARSON, Douglas, M.
发明人： CARSON, Douglas, M.
IPC分类号： G11B7/00
CPC分类号： G11B7/0079 , G11B5/09 , G11B5/553 , G11B7/08576 , G11B7/08582
摘要： Apparatus and method for generating an analog waveform (232, 234, 236), such as a deflection signal (182) used to deflect a write beam (152) during the writing of data to a rotatable medium (102) having a variable track pitch (TP). In accordance with various embodiments, a first digital to analog converter (DAC) (212) is configured to output a deflection signal (218) having an analog voltage level corresponding to a magnitude of a first multi-bit digital input value (214) applied to the first DAC. A second DAC (220, 222) is configured to supply a rail voltage to the first DAC having an analog voltage level corresponding to a magnitude of a second multi-bit digital input value (224, 228) applied to the second DAC. The deflection signal is used to deflect a write beam (152) supplied by a write beam generator (151).
摘要翻译：用于产生模拟波形（232,234,236）的设备和方法，诸如在将数据写入到具有可变轨道间距的可旋转介质（102）期间偏转写入光束（152）的偏转信号（182）（TP）。根据各种实施例，第一数模转换器（DAC）（212）被配置为输出具有对应于施加的第一多位数字输入值（214）的幅度的模拟电压电平的偏转信号（218）到第一个DAC。第二DAC（220,222）被配置为向第一DAC提供具有对应于施加到第二DAC的第二多位数字输入值（224,228）的幅度的模拟电压电平的轨电压。偏转信号用于偏转由写入光束发生器（151）提供的写入光束（152）。

10. 发明申请

WO00049606A2 OPTIMAL READER/WRITER OFFSETS AND WRITE FAULT THRESHOLDS IN A DISC DRIVE 审中-公开
标题翻译：磁盘驱动器中的最佳读取/写入偏移和写入故障阈值
公开(公告)号：WO00049606A2
公开(公告)日：2000-08-24
申请号：PCT/US2000/004479
申请日：2000-02-22
IPC分类号： G11B5/012 , G11B5/39 , G11B5/48 , G11B5/55 , G11B5/596 , G11B19/04 , G11B20/10 , G11B21/10 , G11B27/36
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/4886 , G11B5/553 , G11B5/5534 , G11B5/5582 , G11B5/59611 , G11B5/59627 , G11B5/59644 , G11B5/59683 , G11B19/04 , G11B20/10009 , G11B20/10481 , G11B21/106 , G11B27/36 , G11B2005/3996 , G11B2220/20
摘要： A method for optimizing data transfer performance (200) in a disc drive (100) through selection of optimal reader/writer offsets (280, 300) and write fault thresholds (284, 286, 302, 304). During a reader/writer offset calibration operation (222), an initial offset (294) for a selected track (174, 270) is determined as the radial distance between read and write elements (224, 226) of a head (118) as the head is positioned adjacent the selected track. A write threshold analysis (258) selects asymmetric write fault thresholds (296, 298) on opposing sides of the center of the selected track in relation to the ability of the read element to successfully recover data written to the track. The initial offset is adjusted (278) by an adjustment value determined in relation to the asymmetry of the write fault thresholds, and final write fault thresholds are selected (282) to be symmetric about the center of the selected track.
摘要翻译：一种通过选择最佳读/写偏移（280,300）和写故障阈值（284,286,302,304）优化磁盘驱动器（100）中的数据传输性能（200）的方法。在读取器/写入器偏移校准操作（222）期间，用于所选轨道（174,270）的初始偏移（294）被确定为头部（118）的读取和写入元件（224,226）之间的径向距离，如头部位于所选轨道附近。写入阈值分析（258）相对于读取元件成功恢复写入轨道的数据的能力，在所选轨道的中心的相对侧上选择非对称写入故障阈值（296,298）。调整初始偏移量（278）相对于写入故障阈值的不对称性确定的调整值，并且选择最终写入故障阈值（282）以关于所选轨道的中心对称。

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