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：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。

公开(公告)号：US20100306612A1

公开(公告)日：2010-12-02

申请号：US12473207

申请日：2009-05-27

申请人： Yawshing Tang

发明人： Yawshing Tang

IPC分类号： H03M13/05 ,  G06F11/10

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：US07768728B2

公开(公告)日：2010-08-03

申请号：US12001231

申请日：2007-12-10

申请人： Yawshing Tang ,  Carl Xiaodong Che

发明人： Yawshing Tang ,  Carl Xiaodong Che

IPC分类号： G11B27/36

CPC分类号： G11B27/3027 ,  G11B20/10222 ,  G11B20/18 ,  G11B2220/2516

摘要： A disk drive that includes a head and a disk. The disk drive also includes a circuit that can detect head/disk contact from a jitter determined from a read signal provided by the head. The jitter may correspond to the time interval between two detected sync marks. Alternatively, the jitter may correspond to a change in frequency of a read clock generated from the read signal. These approaches allow for detection of head movement in a down track direction. Down track is a direction that is essentially parallel with the longitudinal axis of the head.

摘要翻译： 包含磁头和磁盘的磁盘驱动器。 磁盘驱动器还包括可以从由头提供的读取信号确定的抖动来检测磁头/磁盘接触的电路。 抖动可以对应于两个检测到的同步标记之间的时间间隔。 或者，抖动可以对应于从读取信号产生的读取时钟的频率变化。 这些方法允许在下行轨道方向上检测头部运动。 下轨道是基本上与头部的纵向轴线平行的方向。

公开(公告)号：US08086944B2

公开(公告)日：2011-12-27

申请号：US12493925

申请日：2009-06-29

申请人： Yawshing Tang

发明人： Yawshing Tang

IPC分类号： G06F11/08

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。