公开(公告)号：US20100309578A1

公开(公告)日：2010-12-09

申请号：US12478716

申请日：2009-06-04

申请人： SungChang Lee ,  Yawshing Tang ,  Mike Suk

发明人： SungChang Lee ,  Yawshing Tang ,  Mike Suk

IPC分类号： G11B21/02

CPC分类号： G11B5/6029 ,  G11B5/40 ,  G11B5/455 ,  G11B5/6005 ,  G11B5/6064

摘要： This application discloses a hard disk drive and operates it based upon using a first and third harmonic amplitude generated from reading a repeated pattern of bits written to a track on a disk surface. Both amplitudes are used to create a first data set and the third harmonic amplitude is used as a single tone to create a second data set. A conversion factor between these two is determine, which may be used to convert the first data set under other conditions into a temperature insensitive table of the electrical stimulus of a vertical micro-actuator and the flying height change of the slider. The hard disk drive may be calibrated during manufacture and/or in the field.

摘要翻译： 本申请公开了一种硬盘驱动器，并且基于使用从读取写入盘表面上的轨道的重复比特模式产生的第一和第三谐波幅度来操作它。 两个幅度用于创建第一数据集，并且三次谐波幅度用作单音以创建第二数据集。 确定这两者之间的转换因子，其可以用于将其他条件下的第一数据集转换成垂直微致动器的电刺激的温度不敏感表和滑块的飞行高度变化。 硬盘驱动器可能在制造和/或现场进行校准。

公开(公告)号：US20090135693A1

公开(公告)日：2009-05-28

申请号：US11998396

申请日：2007-11-28

申请人： Na Young Kim ,  Yawshing Tang ,  Carl Xiaodong Che

发明人： Na Young Kim ,  Yawshing Tang ,  Carl Xiaodong Che

IPC分类号： G11B5/02

CPC分类号： G11B5/012 ,  G11B19/041 ,  G11B20/18 ,  G11B2020/183 ,  G11B2220/2516

摘要： A hard disk drive with a disk that contains a target track and an adjacent track. The drive includes a circuit that determines an error in data read from the target track. Data from the adjacent track is stored in memory. The adjacent track is then erased and the target track data is re-read from the target track. Erasing the adjacent track allows the target track data to be read without adjacent track interference. The data from the adjacent track is typically rewritten onto the disk from memory so no data is lost.

摘要翻译： 硬盘驱动器，其中包含目标轨道和相邻轨道的磁盘。 驱动器包括确定从目标轨道读取的数据中的错误的电路。 来自相邻轨道的数据被存储在存储器中。 然后擦除相邻的轨道，并且从目标轨道重新读取目标轨道数据。 擦除相邻轨道允许在没有相邻轨道干涉的情况下读取目标轨道数据。 来自相邻轨道的数据通常从存储器重写到磁盘上，因此没有数据丢失。

公开(公告)号：US20080316635A1

公开(公告)日：2008-12-25

申请号：US11820992

申请日：2007-06-20

申请人： Kiseok Moon ,  Carl Xiaodong Che ,  Yawshing Tang

发明人： Kiseok Moon ,  Carl Xiaodong Che ,  Yawshing Tang

IPC分类号： G11B21/02

CPC分类号： G11B5/59655 ,  G11B5/59638 ,  G11B5/59683

摘要： A hard disk drive with a disk that has DC erased servo bursts. The DC erased servo bursts are read by a perpendicular recording head that produces a relatively square burst signal. The burst signal is used determine a position error signal and center the head on a track of the disk.

摘要翻译： 具有直流擦除伺服突发的磁盘的硬盘驱动器。 DC擦除的伺服脉冲串由产生相对平方的脉冲串信号的垂直记录头读取。 使用突发信号确定位置误差信号，并将磁头中心在磁盘的磁道上。

公开(公告)号：US20080291564A1

公开(公告)日：2008-11-27

申请号：US11805978

申请日：2007-05-25

申请人： Yawshing Tang ,  Carl Xiaodong Che ,  Na-Young Kim ,  Won C. Yang

发明人： Yawshing Tang ,  Carl Xiaodong Che ,  Na-Young Kim ,  Won C. Yang

IPC分类号： G11B21/02

CPC分类号： G11B21/12 ,  G11B5/5526

摘要： A disk drive that can detect contact between a head and a disk during an off-track operation such as a seek routine, a ramp load or a head take-off. The disk drive includes a circuit that causes the head to move across the disk in a seek routine. A head heater element is driven to move the head into contact with the disk. A read signal provided by the head is filtered through a band pass filter that has a center frequency. The frequency that produces the maximum signal is selected as the center frequency for the band pass filter. The drive can monitor subsequent head contact during an off-track operation by detecting output from the band pass filter.

摘要翻译： 磁盘驱动器，可以在诸如寻道程序，斜坡载荷或磁头起飞之类的偏离轨道操作期间检测磁头和磁盘之间的接触。 磁盘驱动器包括在寻道例程中使磁头移动通过磁盘的电路。 驱动头部加热器元件以移动头部与盘接触。 由头部提供的读取信号通过具有中心频率的带通滤波器进行滤波。 选择产生最大信号的频率作为带通滤波器的中心频率。 驱动器可以通过检测带通滤波器的输出来监视离轨操作期间的后续头部接触。

公开(公告)号：US20100332892A1

公开(公告)日：2010-12-30

申请号：US12493925

申请日：2009-06-29

申请人： Yawshing Tang

发明人： Yawshing Tang

IPC分类号： G06F11/16 ,  G06F11/00

CPC分类号： G11B20/18 ,  G11B20/10009 ,  G11B20/10379 ,  G11B2020/183 ,  G11B2020/1836 ,  G11B2220/2516

摘要： A hard disk drive with a disk that has a plurality of data bits. The drive includes a circuit that reads each data bit n times and selects a value for the bit based on a reliability factor. The circuit may select a bit based at least in part on the most frequent occurrence of one of a plurality of values. For example, if more 0s occurred than 1s the bit would be set to 0. The reliability factor may be a ratio of the occurrence of 0s to the occurrence of 1s. A bit can be not selected or deselected if the reliability factor exceeds a threshold value.

摘要翻译： 具有磁盘的具有多个数据位的硬盘驱动器。 该驱动器包括读取每个数据位n次的电路，并根据可靠性因素选择该位的值。 该电路可以至少部分地基于多个值中的一个值的最频繁出现来选择位。 例如，如果比1更多的0发生，则该位将被设置为0.可靠性因子可以是0的发生与发生1的比率。 如果可靠性因素超过阈值，则无法选择或取消选择。

公开(公告)号：US07830632B2

公开(公告)日：2010-11-09

申请号：US11820707

申请日：2007-06-19

申请人： Yawshing Tang ,  Carl Xiaodong Che

发明人： Yawshing Tang ,  Carl Xiaodong Che

IPC分类号： G11B5/09

CPC分类号： G11B5/596 ,  G11B5/012 ,  G11B20/1262 ,  G11B2020/10537 ,  G11B2020/1292 ,  G11B2220/2516

摘要： A hard disk drive with a disk that includes a first group of tracks and a second group of tracks. The second group of tracks are used to write large blocks of data. For example, data in the second group may be video or audio. The second group of tracks has a higher track density than the first group of tracks. The large data block is written sequentially in the second group of tracks so that there is only one adjacent track write within the group. Using only one adjacent track write allows the tracks within the second group to be overlapped to increase track density.

摘要翻译： 具有包括第一组轨道和第二组轨道的盘的硬盘驱动器。 第二组轨道用于写入大块数据。 例如，第二组中的数据可以是视频或音频。 第二组轨道具有比第一组轨道更高的轨道密度。 大数据块被顺序地写入第二组轨道，使得在该组内只有一个相邻轨迹写入。 仅使用一个相邻轨道写入允许第二组内的轨道重叠以增加轨道密度。

公开(公告)号：US07773336B2

公开(公告)日：2010-08-10

申请号：US12323367

申请日：2008-11-25

申请人： Carl Xiaodong Che ,  Yawshing Tang ,  Haejung Lee

发明人： Carl Xiaodong Che ,  Yawshing Tang ,  Haejung Lee

IPC分类号： G11B21/02

CPC分类号： G11B5/6029 ,  G11B5/5534 ,  G11B5/6064 ,  G11B5/607

摘要： A hard disk drive that determines a flying height from a ratio of a first harmonic transfer function and a third harmonic transfer function. The transfer functions can be determined from a response to an impulse function. The impulse function (also known as an impulse response) can be a playback waveform de-convolved by channel data sequence. Any change in the ratio of the first and third harmonic transfer functions corresponds to a change in the flying height. The disk drive may utilize the transfer function ratios in a feedback routine to control the flying height.

摘要翻译： 硬盘驱动器，从一次谐波传递函数和三次谐波传递函数的比率确定飞行高度。 传递函数可以根据对脉冲函数的响应来确定。 脉冲函数（也称为脉冲响​​应）可以是通过通道数据序列去卷积的重放波形。 第一和第三谐波传递函数的比率的任何变化对应于飞行高度的变化。 磁盘驱动器可以利用反馈程序中的传递函数比来控制飞行高度。

公开(公告)号：US20080259482A1

公开(公告)日：2008-10-23

申请号：US11788630

申请日：2007-04-20

申请人： Kiseok Moon ,  Soo Youl Hong ,  Yawshing Tang ,  Xiaodong Che

发明人： Kiseok Moon ,  Soo Youl Hong ,  Yawshing Tang ,  Xiaodong Che

IPC分类号： G11B5/02 ,  G11B5/127 ,  B05D5/12 ,  G11B5/82

CPC分类号： G11B5/82 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/855

摘要： A magnetic media that has at least one groove. The groove is created by a process that includes initially forming a temporary layer over a magnetic layer of the disk. One or more grooves are formed in the temporary and magnetic layers. The temporary layer is removed and a protective layer is formed over the magnetic layer and within the groove.

摘要翻译： 具有至少一个凹槽的磁性介质。 凹槽由包括最初在盘的磁性层上形成临时层的工艺产生。 在临时层和磁层中形成一个或多个凹槽。 移除临时层，并且在磁性层上和沟槽内形成保护层。

公开(公告)号：US08301972B2

公开(公告)日：2012-10-30

申请号：US12473207

申请日：2009-05-27

申请人： Yawshing Tang

发明人： Yawshing Tang

IPC分类号： H03M13/00

CPC分类号： H03M13/096 ,  H03M13/19 ,  H04L1/0045 ,  H04L1/0061

摘要： This application discloses a message format including a data payload of N bits and a corrector component encoding a checksum to correct the checksum of single bit slipping noise, where the checksum is the sum of each data payload bit by its position modulo N+1. The corrector component may encode a second checksum derived from the checksum that may also be included in the message and so on. Apparatus embodiments may include a transmitter generating a transmitted message of this format and/or a receiver using a received message that may be corrupted from the transmitted message through bit slipping in the form of bit insertion or bit deletion.

摘要翻译： 本申请公开了一种包括N位数据有效载荷的消息格式，以及一个校正单元，用于对校验和进行校正，以校正单位滑移噪声的校验和，其中校验和是每个数据有效负载位数N + 1的位数。 校正器组件可以编码从校验和导出的也可以包括在消息中的第二校验和等等。 装置实施例可以包括发射机，其通过以位插入或比特删除的形式通过比特滑动，生成可以从发送的消息中损坏的接收到的消息的该格式的发送消息和/或接收机。

公开(公告)号：US08040628B2

公开(公告)日：2011-10-18

申请号：US12261557

申请日：2008-10-30

申请人： Yawshing Tang

发明人： Yawshing Tang

IPC分类号： G11B5/09 ,  G11B27/36 ,  G11B21/02

CPC分类号： G11B5/09 ,  B82Y10/00 ,  G11B5/743 ,  G11B5/746 ,  G11B5/82 ,  G11B20/18 ,  G11B2220/252

摘要： A hard disk drive that includes a head that is coupled to a disk. The disk drive further includes a comparator circuit that is coupled to the head. The comparator circuit receives a synchronization signal and a write clock. The comparator generates a write error signal if a comparison of the synchronization and write clock signals exceeds a threshold. The write error signal can inhibit a write operation or cause a rewrite of data.

摘要翻译： 包含耦合到磁盘的磁头的硬盘驱动器。 磁盘驱动器还包括耦合到磁头的比较器电路。 比较器电路接收同步信号和写入时钟。 如果同步和写入时钟信号的比较超过阈值，比较器将产生写入错误信号。 写入错误信号可以抑制写入操作或导致重写数据。