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21. 发明授权

US5557482A Multipath channel apparatus and method for data storage devices and communications systems wherein a data path is selected based on errors 失效
标题翻译：用于数据存储设备和通信系统的多径通道设备和方法，其中基于错误选择数据路径
公开(公告)号：US5557482A
公开(公告)日：1996-09-17
申请号：US359215
申请日：1994-12-19
申请人： Thomas C. Christensen , Earl A. Cunningham
发明人： Thomas C. Christensen , Earl A. Cunningham
IPC分类号： G06F13/00 , G11B20/10 , G11B20/18 , G11B5/09
CPC分类号： G11B20/10009 , G11B20/1833 , G11B2020/183
摘要： A multipath channel apparatus for a data storage device wherein data is stored on a storage medium and is read from the storage medium by a transducer or for a data communications system wherein data is transmitted to a receiver. A data channel having a plurality of data paths is operatively connected to the transducer to receive data read from the storage medium by the transducer, or operatively connected to receive data demodulated by the receiver or base band data received by the receiver. Preferably, each of the data paths has a differing parameter value. An error checking unit checks customer and redundancy data from each of the data paths. A selecting unit, which is responsive to the error checking unit, selects data from one of the data paths. In a preferred embodiment, the data stored on a storage medium includes a data field and an error correcting code field, and the customer and redundancy data from each of the data paths is checked using a calculated error correcting code sydrome.
摘要翻译：一种用于数据存储装置的多路径通道装置，其中数据被存储在存储介质上，并且由换能器或数据通信系统从存储介质读取，其中数据被发送到接收器。具有多个数据路径的数据通道可操作地连接到换能器，以接收由换能器从存储介质读取的数据，或可操作地连接以接收由接收器接收的接收器或基带数据解调的数据。优选地，每个数据路径具有不同的参数值。错误检查单元从每个数据路径检查客户和冗余数据。响应于错误检查单元的选择单元从数据路径之一中选择数据。在优选实施例中，存储在存储介质上的数据包括数据字段和纠错码字段，并且使用计算出的纠错码信息来检查来自每个数据路径的客户和冗余数据。

22. 发明授权

US5455723A Method and apparatus for ramp load and unload 失效
标题翻译：斜坡加载和卸载的方法和装置
公开(公告)号：US5455723A
公开(公告)日：1995-10-03
申请号：US252667
申请日：1994-06-02
申请人： Zine-Eddine Boutaghou , Earl A. Cunningham , Hal H. Ottesen
发明人： Zine-Eddine Boutaghou , Earl A. Cunningham , Hal H. Ottesen
IPC分类号： G11B21/12 , G11B5/54 , G11B21/02 , G11B21/22
CPC分类号： G11B21/12 , G11B21/02 , G11B21/22 , G11B5/54
摘要： Disclosed is a disk drive having at least one disk for storing data. The disk drive includes at least one transducer for reading or writing data to or from the disk. The transducer is attached to an actuator which positions the transducer with respect to the disk. The actuator includes a controllable motor which is used to move the actuator and the transducer attached thereto. The disk drive also includes a ramp for off loading the transducer or for parking the transducer off of the surface of the disk. Also disclosed is apparatus and methods for measuring and controlling the movement of the actuator and attached transducer while the transducer is coming from a position off of the ramp and onto the surface of the disk.
摘要翻译：公开了一种具有至少一个用于存储数据的盘的磁盘驱动器。磁盘驱动器包括至少一个读取或写入数据到磁盘的传感器。传感器连接到将换能器相对于盘定位的致动器。致动器包括可控马达，其用于移动致动器和连接到其上的换能器。磁盘驱动器还包括用于卸载换能器或将换能器从盘的表面停放的斜坡。还公开了一种装置和方法，用于测量和控制致动器和连接的换能器的运动，同时换能器来自斜坡的位置并且到达盘的表面。

23. 发明授权

US5379162A Customized data recovery procedures selected responsive to readback errors and transducer head and disk parameters 失效
标题翻译：响应于回读错误和传感器头和磁盘参数选择的定制数据恢复过程
公开(公告)号：US5379162A
公开(公告)日：1995-01-03
申请号：US109756
申请日：1993-08-19
申请人： Earl A. Cunningham , Bradley E. Hanson
发明人： Earl A. Cunningham , Bradley E. Hanson
IPC分类号： G11B5/09 , G11B19/04 , G11B20/18 , G11B27/36 , H03M13/00
CPC分类号： G11B19/04 , G11B20/1816 , G11B27/36 , G11B2020/183
摘要： A method and apparatus are provided for data recovery in a disk drive data storage system of the type including at least one disk surface and at least one transducer head for reading and/or writing data to a respective disk surface. A plurality data recovery procedures (DRPs) are stored. When a readback error is detected in a readback data signal, a plurality of predetermined transducer head and disk parameters are identified. One of the stored plurality of data recovery procedures (DRPs) is selected responsive to the detected readback error and the identified plurality of predetermined transducer head and disk parameters.
摘要翻译：提供了一种用于在包括至少一个盘表面的盘驱动器数据存储系统中的数据恢复的方法和装置，以及用于向相应的盘表面读取和/或写入数据的至少一个换能器头。存储多个数据恢复过程（DRP）。当在回读数据信号中检测到回读错误时，识别出多个预定的换能器头和盘参数。响应于检测到的回读错误和所识别的多个预定的换能器头和盘参数来选择所存储的多个数据恢复过程（DRP）中的一个。

24. 发明授权

US5287235A Slider air bearing surface with angled rail configuration 失效
标题翻译：滑块空气轴承表面带有斜轨配置
公开(公告)号：US5287235A
公开(公告)日：1994-02-15
申请号：US783477
申请日：1991-10-28
申请人： Earl A. Cunningham , Richard F. Harwood
发明人： Earl A. Cunningham , Richard F. Harwood
IPC分类号： G11B5/60 , G11B21/21 , C11B5/60 , C11B15/64 , C11B17/32
CPC分类号： G11B5/6005 , G11B21/21
摘要： Disclosed is a slider with an air bearing surface for flying a magnetic transducer on an air lubrication film over a moving recording medium. The air bearing surface allows the slider to fly at a close and substantially uniform height over the disk surface regardless of the skew angle of the air flow. The slider has a pair of nonidentical, nonsymmetrical rails disposed about the longitudinal axis of the slider, which through the viscous effects of the air flow, provide the air lubrication film when the recording medium is in motion.
摘要翻译：公开了一种具有空气轴承表面的滑块，用于使空气润滑膜上的磁换能器在运动的记录介质上飞行。空气轴承表面允许滑块在盘表面上靠近且基本上均匀的高度飞行，而与空气流的倾斜角度无关。滑块具有围绕滑块的纵向轴线设置的一对不相对的非对称轨道，其通过气流的粘性效应，在记录介质运动时提供空气润滑膜。

25. 发明授权

US4613915A Twin track vertical magnetic recording servo control method and apparatus with offset voltage compensation 失效
标题翻译：双轨垂直磁记录伺服控制方法和装置，具有失调电压补偿
公开(公告)号：US4613915A
公开(公告)日：1986-09-23
申请号：US787875
申请日：1985-10-16
申请人： William G. Crouse , Earl A. Cunningham , Albert W. Vinal
发明人： William G. Crouse , Earl A. Cunningham , Albert W. Vinal
IPC分类号： G11B5/58 , G11B5/596 , G11B5/56
CPC分类号： G11B5/58 , G11B5/1278 , G11B5/59627
摘要： This invention utilizes a sectored servo control having dual servo tracks recorded in the servo sector. In addition, the servo sector track portions have been recorded with two 180.degree. flux reversals in each track's polarity. The tracks are generally recorded with DC recording current to set a uniform magnetic polarity. The current is switched twice, i.e., from positive and negative and back again or vice versa for each servo track within the servo sector interval. This permits separation of the sensor, amplifier and servo signal offset voltages from the main servo signal itself. Two samples of the servo control voltage are taken during the servo sector interval and the polarity reversal of the servo track is necessary to allow separation of the offset voltages from a variety of sources from the off track or servo error signal.
摘要翻译：本发明利用了在伺服扇区中记录的具有双重伺服磁道的分区伺服控制。另外，伺服扇区轨道部分已经在每个磁道的极性上记录了两个180°的磁通反转。轨道通常以直流记录电流记录，以设定均匀的磁极性。电流从伺服扇区间隔内的每个伺服磁道切换两次，即从正负反向切换，反之亦然。这允许传感器，放大器和伺服信号偏移电压与主伺服信号本身分离。伺服控制电压的两个采样在伺服扇区间隔期间被采取，并且伺服磁道的极性反转是必要的，以允许将来自各种源的偏移电压与偏离磁道或伺服误差信号分离。

26. 发明授权

US4516165A Error recovery procedure using selective erasure 失效
标题翻译：使用选择性擦除的错误恢复过程
公开(公告)号：US4516165A
公开(公告)日：1985-05-07
申请号：US453386
申请日：1982-12-27
申请人： Earl A. Cunningham , Dean C. Palmer
发明人： Earl A. Cunningham , Dean C. Palmer
IPC分类号： G11B5/09 , G11B5/02 , G11B5/58 , G11B5/584 , G11B5/596 , G11B21/10 , G11B27/08
CPC分类号： G11B5/02 , G11B5/58 , G11B5/584 , G11B5/59627
摘要： The data recovery procedure for errors caused by track occlusion as a result of adjacent track misregistration or head sensitivity to the low frequency content of adjacent tracks is effected by reading and storing the information from the adjacent tracks and thereafter erasing the adjacent tracks either on centerline or with the transducer offset toward the intermediate track of interest. The track of interest can then be read with the transducer aligned with the track centerline and at varying positions of offset. If this sequence of rereads fails, the erase step can be repeated with greater amounts of offset toward the intermediate track to further reduce inband interference and the reread sequence also repeated.
摘要翻译：通过读取和存储来自相邻轨道的信息，并且随后在中心线或者中心线上擦除相邻的轨道，来实现由于由相邻轨道重合不足或对相邻轨道的低频内容的头灵敏度而导致的由轨道闭塞引起的误差的数据恢复过程传感器偏移到感兴趣的中间轨道。然后可以用与轨道中心线对准的换能器和偏移的变化位置读取感兴趣的轨迹。如果该重新读取序列失败，则可以以更大量的偏移向中间轨道重复擦除步骤，以进一步减少带内干扰并重新读取序列。

27. 发明授权

US4286296A Transducer positioning system 失效
标题翻译：传感器定位系统
公开(公告)号：US4286296A
公开(公告)日：1981-08-25
申请号：US108905
申请日：1979-12-31
申请人： Earl A. Cunningham
发明人： Earl A. Cunningham
IPC分类号： G05D3/12 , G11B5/596 , G11B21/10 , G11B5/58 , G11B17/00
CPC分类号： G11B5/59655 , G11B5/5965
摘要： A servo system for centering a transducer over boundaries between adjacent servo tracks on a magnetic disk in which the servo tracks are each formed by alternate long and short magnetic segments, with the short segments in one track being centered with the long segments of adjacent tracks. The servo system includes a frequency doubler circuit for producing a uniform frequency square wave signal of double the fundamental frequency of the analog signal picked up by the transducer from the servo encoding, a filter connected with the transducer for producing an analog double frequency signal based on the analog signal from the transducer, a synchronous detector functioning as a multiplier for multiplying the double frequency square wave signal with the analog double frequency signal from the transducer, and a filter for averaging the resultant pulsating position error signal to provide a steady state position error signal for any particular position of the transducer over a pair of adjacent servo tracks. The steady state position error signal is applied to a servo control and servo actuator for moving the transducer until the steady state position error signal reaches zero which corresponds with the desired centered position of the transducer over the boundary between a pair of adjacent servo tracks.
摘要翻译：一种伺服系统，用于将传感器定位在磁盘上的相邻伺服轨道之间的边界上，其中伺服轨道各自由交替的长和短磁段形成，其中一个轨道中的短段与相邻轨道的长段对中。该伺服系统包括一个倍频器电路，用于产生由传感器从伺服编码中拾取的模拟信号的基频的两倍的均匀频率方波信号，与换能器连接的滤波器，用于产生基于来自换能器的模拟信号，用作乘法器的同步检测器，用于将双频方波信号与来自换能器的模拟双频信号相乘;以及滤波器，用于对所得到的脉动位置误差信号进行平均以提供稳态位置误差信号，用于传感器在一对相邻伺服轨道上的任何特定位置。稳态位置误差信号被施加到用于移动换能器的伺服控制和伺服致动器，直到稳态位置误差信号达到零，这对应于在一对相邻伺服轨道之间的边界上的换能器的期望中心位置。

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