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1. 发明申请

US20080170323A1 Utilization of the acceleration zone in ammonite servo writing 失效
公开(公告)号：US20080170323A1
公开(公告)日：2008-07-17
申请号：US11582924
申请日：2006-10-17
申请人： Bipinchandra V. Gami , Yih Hurng Jung , Hao Ping Wen , Kwong-Tat Chan
发明人： Bipinchandra V. Gami , Yih Hurng Jung , Hao Ping Wen , Kwong-Tat Chan
IPC分类号： G11B5/596
CPC分类号： G11B5/59633 , G11B5/59638 , G11B5/59661
摘要： A method for writing servo information onto a disk of a hard disk drive with a servo writer. The method includes accelerating a head to a constant velocity across a disk. The disk being defined as having an acceleration zone and a constant velocity zone. The head is then used to write a spiral servo pattern in the constant velocity zone. A final servo pattern is written in the constant velocity zone using the spiral servo pattern. A servo reference pattern is also written in the acceleration zone. The servo reference pattern is used to write a final servo pattern in the acceleration zone. The final servo pattern may be copied using a run-out cancellation algorithm to improve the accuracy of the servo pattern in the acceleration zone.

2. 发明授权

US07423831B2 Utilization of the acceleration zone in ammonite servo writing 失效
标题翻译：利用加速度区域进行亚历山大的伺服写作
公开(公告)号：US07423831B2
公开(公告)日：2008-09-09
申请号：US11582924
申请日：2006-10-17
申请人： Bipinchandra V. Gami , Yih Hurng Jung , Hao Ping Wen , Kwong-Tat Chan
发明人： Bipinchandra V. Gami , Yih Hurng Jung , Hao Ping Wen , Kwong-Tat Chan
IPC分类号： G11B21/02
CPC分类号： G11B5/59633 , G11B5/59638 , G11B5/59661
摘要： A method for writing servo information onto a disk of a hard disk drive with a servo writer. The method includes accelerating a head to a constant velocity across a disk. The disk being defined as having an acceleration zone and a constant velocity zone. The head is then used to write a spiral servo pattern in the constant velocity zone. A final servo pattern is written in the constant velocity zone using the spiral servo pattern. A servo reference pattern is also written in the acceleration zone. The servo reference pattern is used to write a final servo pattern in the acceleration zone. The final servo pattern may be copied using a run-out cancellation algorithm to improve the accuracy of the servo pattern in the acceleration zone.
摘要翻译：一种使用伺服写入器将伺服信息写入硬盘驱动器的盘的方法。该方法包括将磁头加速到恒定的磁盘速度。盘被定义为具有加速区和恒定速度区。然后头部用于在恒定速度区域中写入螺旋伺服模式。使用螺旋伺服模式将最终伺服模式写入恒速区。伺服参考模式也写入加速区。伺服参考模式用于在加速区域中写入最终的伺服模式。最终的伺服模式可以使用偏移消除算法来复制，以提高加速区域中的伺服模式的精度。

3. 发明授权

US07158336B2 Window timing adjustment for spiral bursts 失效
标题翻译：窗口时序调整螺旋突发
公开(公告)号：US07158336B2
公开(公告)日：2007-01-02
申请号：US11049790
申请日：2005-02-02
申请人： Kwong-Tat Chan , Tom Chan , Bipinchandra V. Gami , Tung Nguyen , Yih Hurng Jung
发明人： Kwong-Tat Chan , Tom Chan , Bipinchandra V. Gami , Tung Nguyen , Yih Hurng Jung
IPC分类号： G11B5/596
CPC分类号： G11B5/59633 , G11B5/59661
摘要： A method for writing servo information onto a disk of a hard disk drive with a servo writer. The method includes writing a plurality of spiral servo signals with a head. The spiral servo signals are used to write servo patterns using at least one timing window. The timing window is adjusted using a position error signal generated from the spiral servo signals. The adjusted timing window is then used to write servo patterns onto the disk. Adjusting the timing window compensates for irregularities in the spiral servo signals.
摘要翻译：一种使用伺服写入器将伺服信息写入硬盘驱动器的盘的方法。该方法包括用头部书写多个螺旋伺服信号。螺旋伺服信号用于使用至少一个定时窗口来写入伺服模式。使用从螺旋伺服信号产生的位置误差信号来调整定时窗口。然后调整的定时窗口将伺服模式写入磁盘。调整定时窗口可补偿螺旋伺服信号的不规则。

4. 发明授权

US07253985B1 Delay clock track read back data to compensate time variance due to disk thermal expansion in spiral servo track writing 失效
标题翻译：延迟时钟轨迹读回数据，以补偿螺旋伺服轨迹写入中由于磁盘热膨胀引起的时间变化
公开(公告)号：US07253985B1
公开(公告)日：2007-08-07
申请号：US11369600
申请日：2006-03-06
申请人： Bipinchandra V. Gami , Joe Bragg , Nikolay Ivanov , Linh Nguyen , Kwong Tat Chan
发明人： Bipinchandra V. Gami , Joe Bragg , Nikolay Ivanov , Linh Nguyen , Kwong Tat Chan
IPC分类号： G11B21/02 , G11B5/09 , G11B5/596
CPC分类号： G11B5/59688 , G11B5/59661
摘要： A method for writing servo information onto a disk of a hard disk drive with a servo writer. The disk has a circumferential index and a band of servo reference tracks. The circumferential index is detected from a clock signal generated from a clock track of the disk. The reference tracks include radial indices. A spiral servo pattern is written upon the detection of the circumferential index and a radial index. The servo writer includes a phase detector that detects changes in the relative position of the circumferential and radial indices and a delay circuit that delays the clock signal to offset such changes.
摘要翻译：一种使用伺服写入器将伺服信息写入硬盘驱动器的盘的方法。盘具有周向索引和伺服参考轨道的带。从从盘的时钟轨道生成的时钟信号中检测周向索引。参考轨道包括径向指数。在检测周向折射率和径向指数时，写入螺旋伺服图案。伺服写入器包括相位检测器，该相位检测器检测周向和径向指标的相对位置的变化以及延迟时钟信号以抵消这种变化的延迟电路。

5. 发明授权

US4157507A Electronic system for detecting direction of motion 失效
标题翻译：用于检测运动方向的电子系统
公开(公告)号：US4157507A
公开(公告)日：1979-06-05
申请号：US912405
申请日：1978-06-05
申请人： Ashok K. Desai , Bipinchandra V. Gami , Eric M. Dunstan
发明人： Ashok K. Desai , Bipinchandra V. Gami , Eric M. Dunstan
IPC分类号： G01R19/14 , H03K5/20
CPC分类号： G01R19/14
摘要： Apparatus for detecting the direction of motion from a reference signal, R, and a quadrature signal, Q, derived from the output signals X+0 and X+90 of a position transducer, wherein the polarity of the reference signal alternates with every fixed increment of motion of a transducer and the quadrature signal which maintains phase difference of +90.degree. or -90.degree. with respect to the reference signal depending on the direction of motion, is comprised of: digital means for producing a narrow pulse, P, at each low-to-high transition of the quadrature signal and a narrow pulse, N, at each high-to-low transition of the quadrature signal; means for determining the direction of motion from these narrow pulses and the reference signal once during each half cycle of the reference signal, and means for storing this direction information until a subsequent determination is made in order to provide a continuous signal indicating the direction of motion.
摘要翻译：用于从参考信号R和从位置传感器的输出信号X + 0和X + 90导出的正交信号Q检测运动方向的装置，其中参考信号的极性与每个固定增量交替根据运动方向，传感器的运动和正交信号相对于参考信号相对于+90°或-90°保持相位差，包括：每个产生窄脉冲P的数字装置在正交信号的每个高到低转换时，正交信号的低到高的转换和窄的脉冲N，N; 用于在参考信号的每个半周期期间从这些窄脉冲和参考信号确定运动方向一次的装置，以及用于存储该方向信息的装置，直到进行后续确定以提供指示运动方向的连续信号。

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