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1. 发明授权

US07580218B2 Magnetic head tester using magnetic disk with pre-written servo 有权
标题翻译：磁头测试仪采用磁盘预写伺服
公开(公告)号：US07580218B2
公开(公告)日：2009-08-25
申请号：US11217872
申请日：2005-09-01
申请人： Lou Shrinkle , David Hu , Peter Crill , Matthew Yee
发明人： Lou Shrinkle , David Hu , Peter Crill , Matthew Yee
IPC分类号： G11B5/596
CPC分类号： G11B5/59627 , G11B5/455
摘要： A method for operating a head testing apparatus (spin stand) using a mounted hard disk that has had its servo track information pre-written in an external servo-writing apparatus rather than in the testing apparatus itself. This insures more accurate servo-track writing and renders the testing operation more efficient. The problem of repeatable runout (RRO) associated with the transfer of a disk written in one machine to another is eliminated by forming a corrected position error signal (PES) by subtracting the average offset of one or more servo sector locations previously calculated using limited bandwidth operation of the servomechanism, from the position error signal generated during full bandwidth servo operation of the apparatus.
摘要翻译：使用已经将其伺服信息信息预写在外部伺服写入装置而不是在测试装置本身中的安装的硬盘来操作头部测试装置（旋转架）的方法。这样可以确保更准确的伺服轨迹写入，并使测试操作更有效率。通过减去先前使用有限带宽计算的一个或多个伺服扇区位置的平均偏移量来形成校正位置误差信号（PES）来消除与将一个机器中写入的盘传输到另一个机器的可重复跳动（RRO）的问题从设备的全带宽伺服操作期间产生的位置误差信号来操作伺服机构。

2. 发明授权

US07672073B2 Iterative repeatable run-out nulling for magnetic head tester 有权
标题翻译：磁头测试仪的迭代可重复跳动归零
公开(公告)号：US07672073B2
公开(公告)日：2010-03-02
申请号：US12070285
申请日：2008-02-14
申请人： Lou Shrinkle , Peter Crill , Matthew Yee , David Hu
发明人： Lou Shrinkle , Peter Crill , Matthew Yee , David Hu
IPC分类号： G11B27/36 , G11B5/596
CPC分类号： G11B27/36 , G11B5/455 , G11B5/59627 , G11B2220/2516
摘要： A method for operating a head testing apparatus or, more generally, a host hard disk drive using a mounted hard disk that has had its servo track information pre-written in an external servo-writing apparatus rather than in the head testing or host apparatus itself. The method eliminates repeatable errors and repeatable runout by effectively replacing the pre-written servo tracks, which are eccentric, with new track profiles that are tracked like circular tracks. The problem of repeatable errors is caused by repeatable runout superimposed upon written-in position errors when a disk written in one machine is transferred to another. This problem is eliminated by forming IRON (Iterative Repeatable Runout Nulling) profile tracks from the initially pre-written servo tracks, where the IRON profile tracks are effectively tracked as concentric circular tracks and generate no PES. The IRON profile is formed by an iterative method that starts with the measurement of the PES of one of the pre-written tracks and iteratively forms a new track profile that is effectively circular.
摘要翻译：一种用于操作头部测试装置的方法，或者更一般地，使用已经将其伺服信息信息预写在外部伺服写入装置而不是在头部测试或主机装置本身中的安装的硬盘驱动器的主机硬盘驱动器。该方法通过有效地更换偏心的预先写入的伺服轨迹来消除可重复的错误和可重复的跳动，跟踪跟踪的新的轨道轮廓像圆形轨迹。当将写入一台机器的磁盘传输到另一台机器时，重复性错误的问题是由重复的跳动叠加在写入位置错误引起的。通过从初始预先写入的伺服轨道形成IRON（迭代可重复跳跃消除）轮廓轨迹来消除该问题，其中IRON轮廓跟踪被有效地跟踪为同心圆形轨迹并且不产生PES。 IRON简档是通过迭代方法形成的，该迭代方法是从预先写入的轨道之一的PES的测量开始，并且迭代地形成有效循环的新的轨道轮廓。

3. 发明申请

US20090140732A1 Low cost simplified spectrum analyzer for magnetic head/media tester 有权
标题翻译：用于磁头/介质测试仪的低成本简化频谱分析仪
公开(公告)号：US20090140732A1
公开(公告)日：2009-06-04
申请号：US11999169
申请日：2007-12-04
申请人： Lou Shrinkle , Peter Crill , Matthew Yee , David Hu
发明人： Lou Shrinkle , Peter Crill , Matthew Yee , David Hu
IPC分类号： G01R23/16 , G01R33/00
CPC分类号： G01R29/26 , G01R23/16 , G01R31/319 , G01R33/0029 , G01R33/1207
摘要： An electronic component tester characterizes electronic components such as magnetic head/media components measure performance parameters such as signal-to-noise ratio and overwrite evaluation. The electronic component tester has a tester process controller and a spectrum analyzer. The tester process controller generates calibration and control signals for the electronic component tester. The spectrum analyzer is in communication with electronic components such as magnetic head or media components to receive a response characterization signal resulting from a stimulus signal applied to the electronic components. The spectrum analyzer then determines a frequency spectrum of the response characterization signal. The spectrum analyzer is also in communication with the tester process controller for transferring the frequency spectrum to the tester process controller. The spectrum analyzer receives the calibration and control signals from the tester process controller for removing effects of an image frequency of the frequency spectrum and determining noise bandwidth of the frequency spectrum.
摘要翻译：电子元件测试仪表征诸如磁头/介质部件的电子部件测量诸如信噪比和覆盖评估之类的性能参数。电子元件测试仪具有测试器过程控制器和频谱分析仪。测试仪过程控制器为电子元件测试仪生成校准和控制信号。频谱分析仪与诸如磁头或媒体组件的电子部件通信，以接收由施加到电子部件的刺激信号产生的响应特征信号。然后，频谱分析仪确定响应特征信号的频谱。频谱分析仪还与测试仪过程控制器进行通信，用于将频谱传输到测试仪过程控制器。频谱分析仪从测试器过程控制器接收校准和控制信号，以消除频谱图像频率的影响并确定频谱的噪声带宽。

4. 发明申请

US20070047124A1 Magnetic head tester using magnetic disk with pre-written servo 有权
标题翻译：磁头测试仪采用磁盘预写伺服
公开(公告)号：US20070047124A1
公开(公告)日：2007-03-01
申请号：US11217872
申请日：2005-09-01
申请人： Lou Shrinkle , David Hu , Peter Crill , Matthew Yee
发明人： Lou Shrinkle , David Hu , Peter Crill , Matthew Yee
IPC分类号： G11B5/02
CPC分类号： G11B5/59627 , G11B5/455
摘要： A method for operating a head testing apparatus (spin stand) using a mounted hard disk that has had its servo track information pre-written in an external servo-writing apparatus rather than in the testing apparatus itself. This insures more accurate servo-track writing and renders the testing operation more efficient. The problem of repeatable runout (RRO) associated with the transfer of a disk written in one machine to another is eliminated by forming a corrected position error signal (PES) by subtracting the average offset of one or more servo sector locations previously calculated using limited bandwidth operation of the servomechanism, from the position error signal generated during full bandwidth servo operation of the apparatus.
摘要翻译：使用已经将其伺服信息信息预写在外部伺服写入装置而不是在测试装置本身中的安装的硬盘来操作头部测试装置（旋转架）的方法。这样可以确保更准确的伺服轨迹写入，并使测试操作更有效率。通过减去先前使用有限带宽计算的一个或多个伺服扇区位置的平均偏移量来形成校正位置误差信号（PES）来消除与将一个机器中写入的盘传输到另一个机器的可重复跳动（RRO）的问题从设备的全带宽伺服操作期间产生的位置误差信号来操作伺服机构。

5. 发明授权

US08525509B2 Low cost simplified spectrum analyzer for magnetic head/media tester 有权
公开(公告)号：US08525509B2
公开(公告)日：2013-09-03
申请号：US11999169
申请日：2007-12-04
申请人： Lou Shrinkle , Peter Crill , Matthew Yee , David Hu
发明人： Lou Shrinkle , Peter Crill , Matthew Yee , David Hu
IPC分类号： G01R23/00
CPC分类号： G01R29/26 , G01R23/16 , G01R31/319 , G01R33/0029 , G01R33/1207
摘要： An electronic component tester characterizes electronic components such as magnetic head/media components measure performance parameters such as signal-to-noise ratio and overwrite evaluation. The electronic component tester has a tester process controller and a spectrum analyzer. The tester process controller generates calibration and control signals for the electronic component tester. The spectrum analyzer is in communication with electronic components such as magnetic head or media components to receive a response characterization signal resulting from a stimulus signal applied to the electronic components. The spectrum analyzer then determines a frequency spectrum of the response characterization signal. The spectrum analyzer is also in communication with the tester process controller for transferring the frequency spectrum to the tester process controller. The spectrum analyzer receives the calibration and control signals from the tester process controller for removing effects of an image frequency of the frequency spectrum and determining noise bandwidth of the frequency spectrum.

6. 发明申请

US20090207516A1 Iterative repeatable run-out nulling for magnetic head tester 有权
标题翻译：磁头测试仪的迭代可重复跳动归零
公开(公告)号：US20090207516A1
公开(公告)日：2009-08-20
申请号：US12070285
申请日：2008-02-14
申请人： Lou Shrinkle , Peter Crill , Matthew Yee , David Hu
发明人： Lou Shrinkle , Peter Crill , Matthew Yee , David Hu
IPC分类号： G11B27/36
CPC分类号： G11B27/36 , G11B5/455 , G11B5/59627 , G11B2220/2516
摘要： A method for operating a head testing apparatus or, more generally, a host hard disk drive using a mounted hard disk that has had its servo track information pre-written in an external servo-writing apparatus rather than in the head testing or host apparatus itself. The method eliminates repeatable errors and repeatable runout by effectively replacing the pre-written servo tracks, which are eccentric, with new track profiles that are tracked like circular tracks. The problem of repeatable errors is caused by repeatable runout superimposed upon written-in position errors when a disk written in one machine is transferred to another. This problem is eliminated by forming IRON (Iterative Repeatable Runout Nulling) profile tracks from the initially pre-written servo tracks, where the IRON profile tracks are effectively tracked as concentric circular tracks and generate no PES. The IRON profile is formed by an iterative method that starts with the measurement of the PES of one of the pre-written tracks and iteratively forms a new track profile that is effectively circular.
摘要翻译：一种用于操作头部测试装置的方法，或者更一般地，使用已经将其伺服信息信息预写在外部伺服写入装置而不是在头部测试或主机装置本身中的安装的硬盘驱动器的主机硬盘驱动器。该方法通过有效地更换偏心的预先写入的伺服轨迹来消除可重复的错误和可重复的跳动，跟踪跟踪的新的轨道轮廓像圆形轨迹。当将写入一台机器的磁盘传输到另一台机器时，重复性错误的问题是由重复的跳动叠加在写入位置错误引起的。通过从初始预先写入的伺服轨道形成IRON（迭代可重复跳跃消除）轮廓轨迹来消除该问题，其中IRON轮廓跟踪被有效地跟踪为同心圆形轨迹并且不产生PES。 IRON简档是通过迭代方法形成的，该迭代方法是从预先写入的轨道之一的PES的测量开始，并且迭代地形成有效循环的新的轨道轮廓。

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