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1. 发明授权

US6163419A Method and apparatus for demodulating a servo burst signal in a hard disk drive 失效
标题翻译：用于解调硬盘驱动器中的伺服脉冲串信号的方法和装置
公开(公告)号：US6163419A
公开(公告)日：2000-12-19
申请号：US53869
申请日：1998-04-01
申请人： Charles H. Sobey , Echere Iroaga
发明人： Charles H. Sobey , Echere Iroaga
IPC分类号： G11B5/596 , G11B5/02 , G11B5/035 , G11B5/09
CPC分类号： G11B5/59688 , G11B5/59655
摘要： A hard disk drive system (10) includes a read head (21) for reading information from a rotating magnetic disk (12). The read head outputs a servo burst signal in response to servo information (59) on the disk. An analog-to-digital converter (33) is provided to oversample the servo burst signal during each of a plurality of successive time intervals, in order to obtain a plurality of samples for each such time interval. An accumulator (74) is provided to sum the samples for each time interval, in order to obtain for each time interval a respective accumulation value that represents an integration of the burst signal for that time interval. A filtering circuit (86) is provided to determine a burst value for the servo burst signal, by applying a filtering function to a set of the accumulation values. The filtering function may involve determining a median accumulation value from the set of accumulation values, or determining a mean of the accumulation values in the set.
摘要翻译：硬盘驱动器系统（10）包括用于从旋转磁盘（12）读取信息的读取头（21）。读取头响应于盘上的伺服信息（59）输出伺服脉冲串信号。提供模数转换器（33）以在多个连续时间间隔的每一个期间过采样伺服脉冲串信号，以便为每个这样的时间间隔获得多个采样。提供累加器（74）以对于每个时间间隔对采样求和，以便为每个时间间隔获得表示该时间间隔的脉冲串信号的积分的相应累积值。提供滤波电路（86）以通过对一组累加值应用滤波函数来确定伺服脉冲串信号的脉冲串值。滤波函数可以包括从累积值集合确定中值累积值，或者确定集合中的累积值的平均值。

2. 发明授权

US06504662B2 Apparatus for measuring and characterizing thermal asperities in a mass data storage device 有权
公开(公告)号：US06504662B2
公开(公告)日：2003-01-07
申请号：US09753322
申请日：2000-12-28
申请人： Charles H. Sobey
发明人： Charles H. Sobey
IPC分类号： G11B502
CPC分类号： G11B5/012 , G11B27/36 , G11B2220/20
摘要： A method and apparatus for characterizing a magnetic disk (40) of the type that contains data to be read by a magneto-resistive type head (18) in proximity thereto is disclosed. The method includes writing a continuous signal onto the disk, and reading back the signal written onto the disk (40) using the magneto-resistive type head (18). The read back signal is compared to a threshold value (58), and areas of said disk at which energy contained in said read back signal occurs above said threshold value (54) are mapped. The energy content is measured by accumulating oversampled signal values from the read back signal during a time at which said read back signal exceeds the threshold value (58).

3. 发明授权

US06674591B1 Method and apparatus for identifying a track of a rotating disk using EPR4 data equalization and detection techniques 有权
标题翻译：使用EPR4数据均衡和检测技术识别旋转盘的轨道的方法和装置
公开(公告)号：US06674591B1
公开(公告)日：2004-01-06
申请号：US09660174
申请日：2000-09-12
申请人： Charles H. Sobey
发明人： Charles H. Sobey
IPC分类号： G11B509
CPC分类号： G11B20/10009 , G11B20/10296 , G11B27/3027 , G11B2020/10888 , G11B2220/20
摘要： According to a broad aspect of the invention, a method and apparatus are presented for identifying a track (42) of a rotating disk (12) of a mass data storage device (10), using EPR4 data detection techniques. The track identification indicia (64) may be written more densely than the track identification indicia would have been written without using EPR4 data equalization techniques, wherein track identification indicia pulses (110-113) may at least partially overlap. The identification indicia (110-113) is read from the disk (12) using a read head (18), and processed using EPR4 data equalization techniques in an EPR4 Viterbi detector (92). The Viterbi detector (92) may be used also to detect data pulses (64) by switching its mode of operation from a track identification mode to a data detection mode.
摘要翻译：根据本发明的广泛方面，提出了一种使用EPR4数据检测技术来识别大容量数据存储装置（10）的旋转盘（12）的轨道（42）的方法和装置。轨道识别标记（64）可以比不用EPR4数据均衡技术写入轨道识别标记更加密集地写出，其中轨道识别标记脉冲（110-113）可以至少部分重叠。使用读头（18）从盘（12）读取识别标记（110-113），并使用EPR4维特比检测器（92）中的EPR4数据均衡技术进行处理。维特比检测器（92）也可以用于通过将其操作模式从轨道识别模式切换到数据检测模式来检测数据脉冲（64）。

4. 发明授权

US06404577B1 Trellis encoding and decoding of track identification indicia 有权
标题翻译：网格编码和解码的轨迹识别标记
公开(公告)号：US06404577B1
公开(公告)日：2002-06-11
申请号：US09696509
申请日：2000-10-25
申请人： Charles H. Sobey
发明人： Charles H. Sobey
IPC分类号： G11B509
CPC分类号： G11B20/10287 , G11B5/012 , G11B20/10009 , G11B20/10074 , G11B20/10296 , G11B27/105 , G11B27/3027 , G11B2220/20
摘要： A method and apparatus for identifying a track (42) of a rotating disk (12) of a mass data storage device (10) uses EPR4 data detection techniques. The values of the encoded track identification indicia are selected so that they have a distance between any two track identification codewords that is larger than the minimum distance of the codeset from which they were selected. The identification indicia (110-113) are read from the disk (12) using a read head (18), and processed using EPR4 data equalization techniques in an EPR4 Viterbi detector (92). The Viterbi detector (92) may have a trellis in which data paths of minimum distance of the codeset from which the track identification indicia (110-113) were selected do not exist. The Viterbi detector (92) may be used also to detect data pulses (64) by switching its mode of operation from a track identification mode to a data detection mode.
摘要翻译：用于识别大容量数据存储装置（10）的旋转盘（12）的轨道（42）的方法和装置使用EPR4数据检测技术。选择编码的轨道识别标记的值，使得它们具有大于它们被选择的代码集的最小距离的任何两个轨迹识别码字之间的距离。使用读头（18）从盘（12）读取识别标记（110-113），并使用EPR4维特比检测器（92）中的EPR4数据均衡技术进行处理。维特比检测器（92）可以具有网格，其中不存在选择轨道识别标记（110-113）的代码集的最小距离的数据路径。维特比检测器（92）也可以用于通过将其操作模式从轨道识别模式切换到数据检测模式来检测数据脉冲（64）。

5. 发明授权

US06483297B2 Method and apparatus for characterizing asymmetries of an MR head 有权
标题翻译：用于表征MR头的不对称性的方法和装置
公开(公告)号：US06483297B2
公开(公告)日：2002-11-19
申请号：US09752221
申请日：2000-12-29
申请人： Charles H. Sobey
发明人： Charles H. Sobey
IPC分类号： G01R3312
CPC分类号： G11B5/09 , G11B5/00 , G11B5/012 , G11B20/10009 , G11B2005/0016
摘要： A method and apparatus for characterizing asymmetries of a magneto-resistive type head in proximity to a magnetic media such as a magnetic disk of a hard disk drive. The method includes using the magneto-resistive type head to read a continuous signal from the magnetic media to provide a read back signal. Energies contained in the read back signal which occur in excess of a predetermined threshold for the positive and negative portions of the read back signal are then determined. The energies may be determined by accumulating sampled signal values from the read back signal in registers during times at which the read back signal exceeds the threshold.
摘要翻译：用于表征磁性介质（例如硬盘驱动器的磁盘）附近的磁阻式磁头的不对称性的方法和装置。该方法包括使用磁阻式磁头读取来自磁介质的连续信号以提供回读信号。然后，确定包含在回读信号中的超过预读阈值的反馈信号的正负部分的能量。可以通过在读回信号超过阈值的时间期间从寄存器中的回读信号累加采样信号值来确定能量。

6. 发明授权

US5856986A Synchronization field pattern selection 失效
标题翻译：同步字段模式选择
公开(公告)号：US5856986A
公开(公告)日：1999-01-05
申请号：US756221
申请日：1996-11-25
申请人： Charles H. Sobey
发明人： Charles H. Sobey
IPC分类号： G11B20/10 , G11B20/12 , G11B20/14 , G11B27/30 , H04L7/04 , G01R31/28
CPC分类号： G11B20/1426 , G11B20/10009 , G11B27/3027 , H04L7/042 , G11B20/1217
摘要： A detection device for detecting a pattern and determining valid patterns by a series of tests. These tests include rejecting patterns based on minimum Hamming distance, spectral energies that are not concentrated with a predetermined ideal spectrum, that are not valid predetermined valid codewords, patterns that are not anti-symmetric and that have closest transition spacing.
摘要翻译：一种用于通过一系列测试来检测图案并确定有效图案的检测装置。这些测试包括基于最小汉明距离的拒绝模式，不集中预定理想频谱的光谱能量，无效的预定有效码字，不反对称且具有最近转换间隔的模式。

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