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31. 发明授权

US06556371B1 Generation of higher-order harmonic sine and cosine sequences by indexing a first-order sine/cosine table 失效
标题翻译：通过索引一阶正弦/余弦表来生成高阶谐波正弦和余弦序列
公开(公告)号：US06556371B1
公开(公告)日：2003-04-29
申请号：US09598234
申请日：2000-06-21
申请人： Hal Hjalmar Ottesen , Gordon James Smith
发明人： Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B5596
CPC分类号： G11B5/59627
摘要： A method of generating a higher-order trigonometric sequence, by constructing a table having a first-order trigonometric sequence, indexing the table to yield a different sequence based on an order number of a desired higher-order harmonic, and catenating values in the table according to the different sequence to yield a higher-order trigonometric sequence whose order is the order number. The table may be a first-order sine sequence, with the method yielding a higher-order sine sequence, or the table may be a first-order cosine sequence, with the method yielding a higher-order cosine sequence. The table has a period N, and indexing is accomplished by computing pointer indices equal to (k*n)mod(N), where k is the order number, and 0≦n
摘要翻译：一种生成高阶三角序列的方法，通过构建具有一阶三角序列的表，根据期望的高次谐波的次序数索引该表以产生不同的序列，并且在表中连接值根据不同的顺序产生一个高阶三角序列，其顺序是序号。该表可以是一阶正弦序列，该方法产生高阶正弦序列，或者该表可以是一阶余弦序列，该方法产生较高阶余弦序列。该表具有周期N，通过计算等于（k * n）mod（N）的指针索引来完成索引，其中k是订单号，0 <= n

32. 发明授权

US06392841B1 Method and apparatus for restoring a thermal response of a magnetoresistive read transducer 有权
标题翻译：用于恢复磁阻读取传感器的热响应的方法和装置
公开(公告)号：US06392841B1
公开(公告)日：2002-05-21
申请号：US09356085
申请日：1999-07-16
申请人： Hal Hjalmar Ottesen , Gordon James Smith
发明人： Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B502
CPC分类号： G11B20/10009 , G11B5/012 , G11B5/02 , G11B2005/0008 , G11B2005/0016
摘要： A method and apparatus for processing a readback signal obtained from a storage medium using a magnetoresistive (MR) element restores a thermal signal component of the signal. A readback signal obtained from the storage medium comprises a thermal component representing a thermal response of the MR element, and may further comprise a magnetic component representing servo or user data. The readback signal is filtered so as to degrade the thermal component of the signal, typically by amplification circuitry exhibiting a highpass filtering behavior. The highpass filtered readback signal is further filtered using a lowpass filter. The filtered signal is sampled, and a sliding window comprising a series of binary values is applied to groups of the signal samples to produce a plurality of signal sample values for each of the signal sample groups. The signal sample values for each of the signal sample groups are summed to produce a restored thermal signal substantially representative of the thermal component of the readback signal. A highpass magnetic readback signal may also be operated on to produce a restored thermal component. A sampled ternary signal is produced by a recording channel using the readback signal as an input. A sliding window is applied to groups of the ternary signal samples to produce signal sample values for each of the ternary signal sample groups. The signal sample values are summed for each of the ternary signal sample groups to produce a restored thermal signal substantially representative of the thermal component of the readback signal.
摘要翻译：用于处理使用磁阻（MR）元件从存储介质获得的回读信号的方法和装置恢复信号的热信号分量。从存储介质获得的回读信号包括表示MR元件的热响应的热分量，并且还可以包括表示伺服或用户数据的磁分量。对回读信号进行滤波，以降低信号的热分量，通常通过表现出高通滤波特性的放大电路。高通滤波的回读信号使用低通滤波器进一步滤波。滤波后的信号被采样，并且包括一系列二进制值的滑动窗口被施加到信号样本的组，以产生每个信号样本组的多个信号采样值。将每个信号样本组的信号样本值求和，以产生基本上代表回读信号的热分量的恢复的热信号。还可以操作高通磁回读信号以产生恢复的热分量。通过使用回读信号作为输入的记录通道产生采样的三进制信号。将滑动窗口应用于三元信号样本的组，以产生每个三元信号样本组的信号样本值。信号采样值对于每个三进制信号样本组求和，以产生基本上代表回读信号的热分量的恢复的热信号。

33. 发明授权

US06385000B1 System and method for extending the operating life of a magnetoresistive transducer provided in a disk drive system 有权
标题翻译：用于延长磁盘驱动系统中提供的磁阻换能器的使用寿命的系统和方法
公开(公告)号：US06385000B1
公开(公告)日：2002-05-07
申请号：US09137983
申请日：1998-08-21
申请人： Hal Hjalmar Ottesen , Gordon James Smith , Donald R. Tobie
发明人： Hal Hjalmar Ottesen , Gordon James Smith , Donald R. Tobie
IPC分类号： G11B1512
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 incorporated in a read/write head involves detecting periods of disk drive system inactivity and selectively switching between the heads for purposes of reading servo information during the inactive periods. Switching between heads may involve selecting each of the heads for reading servo information during one or more periods of disk drive system inactivity or selecting each of the heads in sequence during a respective period of system inactivity. Selecting between heads may also involve selecting a head having a minimum of usage, such as a head having an MR element with a minimum of cumulative operational time or energy dissipation relative to other MR elements provided in the disk drive system. Selecting between heads may further include selectively activating each of the heads for reading servo information for a predetermined duration of time during one or more periods of system idleness. An alternative method involves moving the head to a target location, such as a location of maximum head-to-disk clearance, over a surface of a data storage disk, and reducing the servo sampling rate during a period of system inactivity. Reducing the servo sampling rate involves reducing the rate from a nominal number of servo samples per disk revolution to a reduced number of servo samples per disk revolution, such as one servo sample per disk revolution. The MR elements may be selectively activated during idle periods so as to further reduce usage of the MR elements.
摘要翻译：用于延长结合在读/写头中的MR元件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，并且在非活动时段期间用于读取伺服信息的目的之间有选择地切换磁头。在磁头之间的切换可以包括在磁盘驱动器系统不活动的一个或多个周期期间选择每个磁头以读取伺服信息，或者在系统不活动的相应周期期间依次选择每个磁头。头之间的选择还可以涉及选择具有最小使用量的头部，例如具有相对于在盘驱动器系统中提供的其它MR元件具有最小累积操作时间或能量耗散的MR元件的头部。磁头之间的选择还可以包括在系统空闲的一个或多个周期期间选择性地激活每个磁头用于读取伺服信息一段预定的持续时间。一种替代方法包括将头部移动到数据存储盘的表面上的目标位置，例如最大头到盘间隙的位置，并且在系统不活动期间降低伺服采样率。降低伺服采样速率包括将每个磁盘转数的标称数量的伺服样本的速率降低到每个磁盘旋转的减少的伺服样本数，例如每个磁盘旋转的一个伺服样本。可以在空闲时段期间选择性地激活MR元件，以便进一步减少MR元件的使用。

34. 发明授权

US06239936B1 Method and apparatus for calibrating a thermal response of a magnetoresistive element 失效
标题翻译：用于校准磁阻元件的热响应的方法和装置
公开(公告)号：US06239936B1
公开(公告)日：2001-05-29
申请号：US08914662
申请日：1997-08-19
申请人： David William Abraham , Timothy Joseph Chainer , Karl-Friedrich Etzold , Hal Hjalmar Ottesen , Gordon James Smith
发明人： David William Abraham , Timothy Joseph Chainer , Karl-Friedrich Etzold , Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B2102
CPC分类号： G11B21/025 , G11B5/59683 , G11B2005/001 , G11B2005/0016
摘要： A method and apparatus for calibrating a thermal response of a magnetoresistive element is provided. In accordance with one embodiment of the invention, a thermal spacing signal is read using an MR element spaced apart from a surface of a moving storage medium. From the thermal spacing signal a signal value and calibration value are produced. Using the signal value and the calibration value a calibrated signal value is produced. The calibrated signal value may, for example, be compared against a pre-determined threshold to detect surface defects on the storage medium.
摘要翻译：提供了一种用于校准磁阻元件的热响应的方法和装置。根据本发明的一个实施例，使用与移动存储介质的表面间隔开的MR元件读取热间隔信号。从热间隔信号产生信号值和校正值。使用信号值和校准值，产生校准信号值。校准信号值可以例如与预定阈值进行比较以检测存储介质上的表面缺陷。

35. 发明授权

US06208804B1 Multimedia direct access storage device and formatting method 失效
标题翻译：多媒体直接访问存储设备和格式化方法
公开(公告)号：US06208804B1
公开(公告)日：2001-03-27
申请号：US09035624
申请日：1998-03-05
申请人： Hal Hjalmar Ottesen , Gordon J. Smith , George Willard VanLeeuwen
发明人： Hal Hjalmar Ottesen , Gordon J. Smith , George Willard VanLeeuwen
IPC分类号： H04N5781
CPC分类号： H04N7/24 , G11B20/1217 , G11B27/034 , G11B27/105 , G11B2020/1062 , G11B2220/41 , G11B2220/415 , H04N5/781 , H04N5/783 , H04N7/17318 , H04N7/17336 , H04N21/21 , H04N21/2225 , H04N21/23 , H04N21/42646 , H04N21/4312 , H04N21/4314 , H04N21/432 , H04N21/4325 , H04N21/4331 , H04N21/4334 , H04N21/443 , H04N21/47202 , H04N21/8456 , Y10T70/476
摘要： A multimedia direct access storage device and a method for transferring source program signals representative of a compressed digital multimedia program to and from the direct access storage device are disclosed. A multimedia program is transmitted from a multimedia server as a custom ordered series of discrete program segments and received by the multimedia direct access storage device, which buffers the compressed program segments for subsequent presentation on a local display monitor. The multimedia direct access storage device is preferably incorporated as a component of a local set-top control system for buffering a predetermined number of compressed program segments received from the multimedia server, some of which may be non-sequentially ordered and others of which may be sequentially ordered. A novel formatting methodology provides for the sequential presentation of the program segments asynchronously distributed on one or more data storage disks disposed in the direct access storage device. A user-definable presentation control window for performing local VCR-type presentation control functions for the portion of a multimedia program buffered in the direct access storage device is also provided through the novel formatting methodology.
摘要翻译：公开了一种多媒体直接存取存储装置和一种将代表压缩数字多媒体程序的源程序信号传送到直接存取存储装置和从直接存取存储装置传送的方法。多媒体程序作为定制的一系列离散程序段从多媒体服务器发送并由多媒体直接访问存储设备接收，多媒体直接访问存储设备缓冲压缩的程序片段，以便随后呈现在本地显示器上。多媒体直接访问存储设备优选地被并入作为本地机顶控制系统的组件，用于缓冲从多媒体服务器接收的预定数量的压缩节目段，其中一些可以是非顺序排列的，其中一些可以是按顺序排序。一种新颖的格式化方法提供了异步分布在设置在直接访问存储设备中的一个或多个数据存储盘上的程序段的顺序呈现。还通过新颖的格式化方法提供用于对缓冲在直接访问存储设备中的多媒体程序的部分执行本地VCR型呈现控制功能的用户可定义的呈现控制窗口。

36. 发明授权

US6104562A Multiple element transducer for magnetic recording 失效
标题翻译：用于磁记录的多元传感器
公开(公告)号：US6104562A
公开(公告)日：2000-08-15
申请号：US834781
申请日：1997-04-03
申请人： Hal Hjalmar Ottesen , Gordon James Smith
发明人： Hal Hjalmar Ottesen , Gordon James Smith
IPC分类号： G11B5/00 , G11B5/012 , G11B5/39 , G11B5/48 , G11B5/55 , G11B5/596 , G11B15/12
CPC分类号： G11B5/4886 , G11B5/012 , G11B5/3945 , G11B5/5526 , G11B5/59683 , G11B5/59688 , G11B2005/001 , G11B2005/0018 , G11B5/3967
摘要： In a rotating magnetic disk storage device which uses an imbedded servo pattern for positioning an actuator, each transducer head comprises two magnetoresistive read elements, the read elements being separated by an insulating layer. The read elements are of different widths, the narrower element being used to read data, and the wider element being used to read servo patterns which locate the track centerline. The read elements are preferably deposited in layers on the rear of the slider body, with a thin-film inductive write head deposited in layers over the read elements. Preferably, the read elements are connected to three lead wires: a common ground lead, and separate sense leads. The sense amplification electronics alternatively sense resistance changes in one element or the other as the head passes over data or servo patterns. Because the narrow read element is used for reading data, noise due to reading too close to the edge of the track can be reduced. Because the wide element is used for reading the track centerline servo pattern, the full pattern width can be read and the transducer positioned more accurately.
摘要翻译：在使用嵌入式伺服图案来定位致动器的旋转磁盘存储装置中，每个换能器头包括两个磁阻读取元件，读取元件由绝缘层分开。读取的元件具有不同的宽度，较窄的元件用于读取数据，并且较宽的元件用于读取定位轨道中心线的伺服模式。读取的元件优选地以滑块体的后部上的层沉积，薄膜感应写头沉积在读取元件上的层中。优选地，读取元件连接到三根引线：公共接地引线和单独的检测引线。当磁头通过数据或伺服模式时，感测放大电路可选地感测电阻在一个元件或另一个元件中改变。由于窄读取元件用于读取数据，所以可以减少由于读取太靠近轨道的边缘而导致的噪声。由于宽元件用于读取轨道中心线伺服模式，因此可以读取完整的图案宽度，并且换能器更准确地定位。

37. 发明授权

US6049441A Method and apparatus for real-time filtering of a position error signal for a disk drive servo system 有权
标题翻译：用于磁盘驱动器伺服系统的位置误差信号的实时滤波的方法和装置
公开(公告)号：US6049441A
公开(公告)日：2000-04-11
申请号：US235718
申请日：1999-01-22
申请人： Hal Hjalmar Ottesen
发明人： Hal Hjalmar Ottesen
IPC分类号： G11B5/55 , G11B5/596 , G11B21/08 , G11B21/10
CPC分类号： G11B21/083 , G11B21/106 , G11B5/5526 , G11B5/59622
摘要： A method and apparatus for real-time filtering of a position error signal in a servo system of a disk drive. Pre-calculated periodic components of the position error signal (PES) are used as future values in a real-time filter, preferably a real-time recursive median filter. This minimizes the amount of time-lag between obtaining the raw PES measurement from the disk surface and the providing the corresponding filtered PES output. This reduced time-lag minimizes the effect on the phase margin (PM) and results in improved servo stability. The invention can be used not only in servo systems in disk drives, but also in servo systems of other mechanical moving storage devices and in servo systems of rotating mechanical machinery in general, where the signal to be filtered may be a position error, velocity error, acceleration error, and the like.
摘要翻译：一种用于对磁盘驱动器的伺服系统中的位置误差信号进行实时滤波的方法和装置。位置误差信号（PES）的预先计算的周期分量被用作实时滤波器中的未来值，优选地是实时递归中值滤波器。这最小化从盘表面获得原始PES测量和提供相应的过滤PES输出之间的时间延迟量。这种减小的时间延迟使对相位裕度（PM）的影响最小化，并且导致改善的伺服稳定性。本发明不仅可用于磁盘驱动器中的伺服系统，还可用于其他机械移动存储设备的伺服系统和旋转机械机械的伺服系统中，其中要过滤的信号可能是位置误差，速度误差，加速度误差等。

38. 发明授权

US6005742A Method and apparatus for controlling a multiple-stage actuator for a disk drive 失效
标题翻译：用于控制磁盘驱动器的多级致动器的方法和装置
公开(公告)号：US6005742A
公开(公告)日：1999-12-21
申请号：US116745
申请日：1998-07-16
申请人： Earl Albert Cunningham , Long-Sheng Fan , Hal Hjalmar Ottesen , Timothy Clark Reiley
发明人： Earl Albert Cunningham , Long-Sheng Fan , Hal Hjalmar Ottesen , Timothy Clark Reiley
IPC分类号： G11B5/55 , G11B5/596 , G11B7/085 , G11B7/09 , G11B21/08
CPC分类号： G11B7/0901 , G11B21/085 , G11B5/5552 , G11B5/5556 , G11B5/59605 , G11B5/59627 , G11B7/08505 , G11B7/08576 , G11B7/0937 , G11B7/0945
摘要： A method and apparatus for controlling a multiple-stage actuator for a disk drive which does not require an additional sensor for measuring the relative position between adjacent actuator stages. In a two-stage actuator system, a position-type secondary actuator (SA) rides piggyback on a primary actuator (PA). The repeatable runout is measured and used as a feedforward signal to the PA. If the PA is a rotary actuator, the feedforward signal is preferably arc corrected for the arc that the head transverses from the inner radius to the outer radius of the disk. Added to the feedforward signal is the moving average of the drive signal applied to the SA. Because the SA is of the position-type having a neutral position, this moving average is proportional to the time cumulative drift present in the two-stage actuator system, and forces the PA in a direction that minimizes deviation of the SA from its neutral position. This minimizes the range requirement for the SA, the main purpose of which is to reduce non-repeatable runout.
摘要翻译：一种用于控制磁盘驱动器的多级致动器的方法和装置，其不需要用于测量相邻致动器级之间的相对位置的附加传感器。在两级致动器系统中，位置型辅助致动器（SA）骑在主致动器（PA）上。可重复的跳动被测量并用作PA的前馈信号。如果PA是旋转致动器，则前馈信号优选地对于磁头从磁盘的内半径到外半径横向旋转的弧线被校正。添加到前馈信号是施加到SA的驱动信号的移动平均值。由于SA是具有中立位置的位置型，因此该移动平均值与两级致动器系统中存在的时间累积漂移成比例，并且迫使PA沿使SA偏离其中立位置的偏差最小的方向。这最小化了SA的范围要求，其主要目的是减少不可重复的跳动。

39. 发明授权

US5854722A Method and apparatus for rotary actuator arc compensation correction in a direct access storage device 失效
公开(公告)号：US5854722A
公开(公告)日：1998-12-29
申请号：US443963
申请日：1995-05-18
申请人： Earl Albert Cunningham , Kevin Jack Erickson , Hal Hjalmar Ottesen
发明人： Earl Albert Cunningham , Kevin Jack Erickson , Hal Hjalmar Ottesen
IPC分类号： G11B5/48 , G11B5/55 , G11B5/596 , G11B21/08 , G11B21/10
CPC分类号： G11B5/59605 , G11B21/083 , G11B21/085 , G11B21/106 , G11B5/5534 , G11B5/59627 , G11B5/59644 , G11B5/59655 , G11B5/59688
摘要： Rotary actuator arc compensation correction method and apparatus are provided for a direct access storage device (DASD). A reference feedforward correction signal is generated at each of a plurality of sectors around a predetermined track on a disk surface. A specific selected track is identified, and both magnitude and phase of the generated reference feedforward correction signal are modified to correct for the arced trajectory caused by the rotary actuator at the specific selected track. Improved actuator servo control is provided by using pseudo sector compensation to interpolate the feedforward correction signal between servo sectors.

40. 发明授权

US5751510A Method and apparatus for restoring a thermal response signal of a magnetoresistive head 失效
标题翻译：用于恢复磁阻头的热响应信号的方法和装置
公开(公告)号：US5751510A
公开(公告)日：1998-05-12
申请号：US581906
申请日：1996-01-02
申请人： Gordon J. Smith , Hal Hjalmar Ottesen
发明人： Gordon J. Smith , Hal Hjalmar Ottesen
IPC分类号： G11B5/39 , G11B5/012 , G11B5/02 , G11B5/596 , G11B19/04 , G11B20/10 , G11B20/22
CPC分类号： G11B20/10009 , G11B19/04 , G11B20/22 , G11B5/02 , G11B5/59683 , G11B5/012
摘要： An apparatus and method for reading an information signal from a magnetic storage medium using a magnetoresistive (MR) element, modifying the signal such that a thermal component of the signal representing a thermal response of the MR element is degraded, and altering the modified signal to produce a restored thermal signal substantially representative of the thermal component of the signal read from the storage medium. The information signal induced in the MR element is communicated from the MR element to an arm electronics (AE) module having a highpass filtering behavior. The AE module passes content of the information signal other than the thermal component content, thereby degrading the thermal component of the information signal. An inverse filter, implemented using an infinite impulse response (IIR) filter, receives the highpass filtered signal from the AE module and produces a restored thermal signal substantially representative of the thermal component of the information signal. The inverse filter has a response substantially inverse to that of the effective highpass filter of the AE module. A signal summing device is coupled to the AE module and the inverse filter for receiving a restored thermal signal from the inverse filter and a composite signal, including thermal and magnetic components, from the AE module and substantially eliminates the thermal component of the composite signal, which otherwise distorts or modulates the composite signal.
摘要翻译：一种用于使用磁阻（MR）元件从磁存储介质读取信息信号的装置和方法，修改信号，使得表示MR元件的热响应的信号的热分量降级，并将修改的信号改变为产生基本上代表从存储介质读取的信号的热分量的恢复的热信号。在MR元件中感应的信息信号从MR元件传送到具有高通滤波行为的臂电子（AE）模块。 AE模块通过热分量内容以外的信息信号的内容，从而降低信息信号的热分量。使用无限脉冲响应（IIR）滤波器实现的逆滤波器从AE模块接收高通滤波的信号，并产生基本上代表信息信号的热分量的恢复的热信号。逆滤波器具有与AE模块的有效高通滤波器相反的响应。信号求和装置耦合到AE模块和反向滤波器，用于接收来自逆滤波器的恢复的热信号和来自AE模块的包括热和磁分量的复合信号，并且基本上消除了复合信号的热分量，否则会扭曲或调制复合信号。

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