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1. 发明授权

US5311376A Information detecting system 失效
标题翻译：信息检测系统
公开(公告)号：US5311376A
公开(公告)日：1994-05-10
申请号：US714102
申请日：1991-06-11
申请人： David B. Joan , Michael R. Spaur , Richard W. Hull , Takashi Asami , Marshall D. Lee , Robert P. Mento , Min-Hui Wang
发明人： David B. Joan , Michael R. Spaur , Richard W. Hull , Takashi Asami , Marshall D. Lee , Robert P. Mento , Min-Hui Wang
IPC分类号： G11B20/12 , G11B20/14 , G11B27/30 , H04L7/027 , H04L7/033 , H04L7/04 , H04L7/08 , H04L25/06 , H03K17/00 , G11B5/09
CPC分类号： G11B20/1403 , G11B27/3027 , H04L25/068 , H04L7/0337 , H04L7/041 , G11B20/1252 , G11B2020/1282 , H04L7/027 , H04L7/08
摘要： An integrated servo system for a disk drive employing sector servo positioning information on concentric tracks of a recording medium utilizes a servo burst pattern with three sequentially occurring servo bursts. One burst is positioned to have a maximum amplitude plateau on a track centerline of alternate tracks, and the other two bursts have maximum plateau values at locations between the centerlines of adjacent tracks. The amplitudes of the bursts are sequentially detected by a peak detector and supplied to sample and hold circuitry for measuring their relative amplitudes. Discriminator circuitry utilizes a window to provide two samples of each transition in the servo pattern and compares the samples to detect different fields and events in the pattern.
摘要翻译：在采用记录介质的同心磁道上的扇区伺服定位信息的磁盘驱动器的集成伺服系统利用具有三个顺序发生的伺服脉冲串的伺服脉冲串模式。一个突发被定位为在交替轨道的轨道中心线上具有最大幅度平台，而另外两个脉冲串在相邻轨道的中心线之间的位置处具有最大平稳值。脉冲串的幅度由峰值检测器顺序地检测，并提供给采样和保持电路以测量它们的相对幅度。鉴别器电路利用窗口提供伺服模式中每个转换的两个样本，并比较样本以检测模式中的不同场和事件。

2. 发明授权

US6067206A Method and apparatus to compensate for servo wedge rotational offset after a head switch 失效
标题翻译：磁头开关后补偿伺服楔形旋转偏移的方法和装置
公开(公告)号：US6067206A
公开(公告)日：2000-05-23
申请号：US972655
申请日：1997-11-18
申请人： Richard W. Hull , David B. Joan , Charles R. Patton, III , Vafa James Rakshani , Charles W. Simmons
发明人： Richard W. Hull , David B. Joan , Charles R. Patton, III , Vafa James Rakshani , Charles W. Simmons
IPC分类号： G11B5/48 , G11B5/55 , G11B5/596 , G11B21/08
CPC分类号： G11B5/59688 , G11B5/5534 , G11B5/5565 , G11B5/59627 , G11B5/59644 , G11B5/59655
摘要： A disk drive controller having a microprocessor and a sampled signal head positioning system measures and stores the relative rotational offsets between heads arranged in a stacked relationship and respective servo wedges on different disk surfaces. The offsets are stored in a table and subsequently applied to a servo wedge detection circuit to ensure that a next sequential wedge is detected after a head switch.
摘要翻译：具有微处理器和采样信号头定位系统的磁盘驱动器控制器测量和存储在堆叠关系中布置的磁头之间的相对旋转偏移和在不同磁盘表面上的各个伺服楔。偏移量存储在表格中，随后应用于伺服楔形检测电路，以确保在头部开关之后检测到下一个顺序的楔形物。

3. 发明授权

US06636377B1 Method of tuning feed-forward control in a disk drive 失效
标题翻译：调整磁盘驱动器中前馈控制的方法
公开(公告)号：US06636377B1
公开(公告)日：2003-10-21
申请号：US09608573
申请日：2000-06-30
申请人： Jie Yu , David B. Joan
发明人： Jie Yu , David B. Joan
IPC分类号： G11B5596
CPC分类号： G11B5/59605 , G11B5/5547
摘要： A method of tuning a servo control system in a disk drive that implements seeks using a the feed-forward command effort signal uffwd and a PES reference signal r that were designed to be compatible with one another on the basis of a modeled frequency response G0(z) that is different from an actual frequency response G(z). The steps includes scaling the feed-forward command effort signal uffwd to substantially achieve a zero velocity condition at an end of the seek; scaling the feed-forward command effort signal uffwd to substantially achieve an on-target condition at the end of the seek; and modifying the PES reference signal r such that it substantially varies in unison with the indicated PES signal y during the seek
摘要翻译：一种调整磁盘驱动器中的伺服控制系统的方法，该方法使用基于建模的频率响应G0（被设计为彼此兼容）的前馈命令工作信号uffwd和PES参考信号r来实现寻道 z）与实际频率响应G（z）不同。这些步骤包括缩放前馈命令努力信号uffwd以在搜索结束时基本上实现零速度条件; 缩放前馈命令努力信号uffwd以在搜索结束时基本上实现目标条件; 以及修改PES参考信号r，使得其在搜索期间与所指示的PES信号y一致地基本上变化

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