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1. 发明授权

US5909333A Servo-writing system for use in a data recording disk drive 失效
标题翻译：用于数据记录磁盘驱动器的非侵入式伺服写入系统
公开(公告)号：US5909333A
公开(公告)日：1999-06-01
申请号：US878711
申请日：1997-06-18
申请人： John Stewart Best , Wen-Wei Chiang , Steven Robert Hetzler , Donald Edward Horne , Chih-Kung Lee , Vincent Marrello
发明人： John Stewart Best , Wen-Wei Chiang , Steven Robert Hetzler , Donald Edward Horne , Chih-Kung Lee , Vincent Marrello
IPC分类号： G01B11/00 , G01B11/26 , G01D5/38 , G11B5/55 , G11B21/08 , G11B21/10 , G11B5/09
CPC分类号： G11B21/083 , G11B5/5534
摘要： A non-invasive servo-write system for use in a data recording disk drive. The system measures actuator position and generates a reference clock using semiconductor lasers. Internal position references are provided by reflective diffraction gratings affixed to the actuator arm and the spindle hub. Wavefront reconstruction optics correct for aberrations in the gratings. Optical sensors detect differential changes in the diffraction patterns created by the gratings, eliminating sensitivity to frequency drift. Decode electronics convert optical sensor data into an actuator position measurement. Control electronics drive the voice coil motor within the disk drive, which positions the write transducer to record servo information provided in a servo pattern generator. Transparent windows in the head-disk-assembly cover allow the servo-writer to write drives which are completely assembled and sealed.
摘要翻译：一种用于数据记录磁盘驱动器的非侵入式伺服写入系统。该系统测量致动器位置，并使用半导体激光器产生参考时钟。内部位置参考由固定在执行器臂和主轴毂上的反射衍射光栅提供。波前重构光学校正光栅中的像差。光学传感器检测由光栅产生的衍射图案的差异变化，消除了对频率漂移的敏感性。解码电子元件将光学传感器数据转换为执行器位置测量。控制电子装置驱动磁盘驱动器内的音圈电机，其将写入传感器定位以记录提供在伺服模式发生器中的伺服信息。头盘组件盖中的透明窗口允许伺服写入器写入完全组装和密封的驱动器。

2. 发明授权

US6092412A Glide height test signal processor and method using increased high frequency components 失效
标题翻译：滑行高度测试信号处理器和方法使用增加的高频分量
公开(公告)号：US6092412A
公开(公告)日：2000-07-25
申请号：US72946
申请日：1998-05-05
申请人： Karl Arthur Flechsig , Donald Edward Horne , Sylvia Lui Lee , Walter Gerald Woodworth
发明人： Karl Arthur Flechsig , Donald Edward Horne , Sylvia Lui Lee , Walter Gerald Woodworth
IPC分类号： G11B5/82 , G11B19/04 , G11B33/10 , B23K26/00
CPC分类号： G11B19/04 , G11B33/10 , G11B5/82
摘要： A glide height test signal processor and method using increased high frequency components is disclosed. The processor is more sensitive to smaller asperities, maintains the positive characteristics of being monotonic and can be easily calibrated. The system includes a circuit for converting asperity contact to an electrical signal, a first bandpass circuit coupled to the first circuit, the first bandpass circuit having a first amplifier for amplifying the electrical signal by a first gain to generate a first amplified signal and a first filter for filtering the first amplified signal at a high frequency to generate a first filtered signal, wherein the first gain is selected for detection of asperities having a diameter of less than or equal to five microns and a processing circuit, coupled to the first bandpass circuit, for processing the first filtered signal to generate an indication of contact with an asperity having a diameter of less than or equal to five microns. A second bandpass circuit may be coupled to the first circuit, wherein the second bandpass circuit has a second amplifier for amplifying the electrical signal by a second gain to generate a second amplified signal and a second filter for filtering the second amplified signal at a low frequency to generate a second filtered signal, wherein the ratio of the first gain and the second gain is substantially at least thirty to one.
摘要翻译：公开了一种使用增加的高频分量的滑行高度测试信号处理器和方法。处理器对较小的凹凸更敏感，保持单调的正面特征，并且可以轻松校准。该系统包括用于将粗糙度接触转换为电信号的电路，耦合到第一电路的第一带通电路，第一带通电路具有用于通过第一增益放大电信号以产生第一放大信号的第一放大器和第一滤波器，用于以高频率对第一放大信号进行滤波以产生第一滤波信号，其中选择第一增益用于检测直径小于或等于5微米的粗糙度，以及耦合到第一带通电路的处理电路，用于处理第一滤波信号以产生与直径小于或等于5微米的粗糙度接触的指示。第二带通电路可以耦合到第一电路，其中第二带通电路具有用于通过第二增益放大电信号的第二放大器以产生第二放大信号，以及用于以低频率滤波第二放大信号的第二滤波器以产生第二滤波信号，其中第一增益和第二增益的比率基本上至少为三十比一。

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