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1. 发明授权

US06724562B1 Segmented constant angle trackpitch 有权
标题翻译：分段恒角轨道间距
公开(公告)号：US06724562B1
公开(公告)日：2004-04-20
申请号：US09538535
申请日：2000-03-30
申请人： Chiap Heok Ang , Niroot Jierapipatanakul , Beng Theam Ko , Myint Ngwe , Beng Wee Quak , Choonkiat Lim
发明人： Chiap Heok Ang , Niroot Jierapipatanakul , Beng Theam Ko , Myint Ngwe , Beng Wee Quak , Choonkiat Lim
IPC分类号： G11B5596
CPC分类号： G11B5/59633
摘要： A method for writing servo patterns on at least one disc in a disc drive that has a first set of tracks and a second set of tracks on a major surface of the disc includes stepping between the tracks of the first set of tracks at a first constant angle, and stepping between the tracks of the second set of tracks at a second constant angle. Stepping between tracks in the first group or the second group includes selecting two adjacent tracks from either the first group of tracks or the second group of tracks, and determining the angle through which an actuator assembly must be rotated between the two adjacent tracks selected to produce a selected track pitch. The method produces a disc for a disc drive with a first set of tracks, and a second set of tracks in which the track pitch varies across the set of tracks.
摘要翻译：一种用于在盘驱动器中的至少一个盘上写入伺服图案的方法，所述盘驱动器具有第一组轨道，并且在所述盘的主表面上的第二组轨道包括在所述第一组轨道的轨道之间以第一常数角度，并以第二恒定角度在第二组轨道的轨迹之间进行步进。在第一组或第二组中的轨道之间的步进包括从第一组轨道或第二组轨道中选择两个相邻的轨道，并且确定致动器组件必须在被选择产生的两个相邻轨道之间旋转的角度选定的音高。该方法产生用于具有第一组轨道的盘驱动器的盘，以及轨道间距在该组轨道上变化的第二组轨道。

2. 发明授权

US06721120B2 Prediction and cancellation of cage frequency in a disc drive 有权
标题翻译：磁盘驱动器中笼式频率的预测和取消
公开(公告)号：US06721120B2
公开(公告)日：2004-04-13
申请号：US09844159
申请日：2001-04-27
申请人： Shuang Quan Min , Kian Keong Ooi , Ricky WeiWatt Yeo , Chiap Heok Ang , Ming Zhong Ding , Beng Wee Quak
发明人： Shuang Quan Min , Kian Keong Ooi , Ricky WeiWatt Yeo , Chiap Heok Ang , Ming Zhong Ding , Beng Wee Quak
IPC分类号： G11B2102
CPC分类号： G11B5/59633
摘要： A method for writing servo information to a disc rotatably mounted to a spindle motor. A measured cage frequency is obtained from a written reference track, from which an actual cage frequency is predicted. The predicted cage frequency is then used to derive compensated position commands. During a servo write interval, the compensated position commands are used to control the head such that the head follows the disc movements caused by the cage frequency.
摘要翻译：一种将伺服信息写入可旋转地安装在主轴电动机上的盘的方法。测量的笼式频率从预测实际笼频率的书写参考轨迹获得。然后使用预测的笼式频率来导出补偿位置命令。在伺服写入间隔期间，补偿位置命令用于控制磁头，使得磁头跟随由磁盘笼频率引起的磁盘运动。

3. 发明授权

US06587293B1 Method for servo writing servo pattern at a desired speed 有权
标题翻译：以所需速度伺服写入伺服模式的方法
公开(公告)号：US06587293B1
公开(公告)日：2003-07-01
申请号：US09516010
申请日：2000-02-29
申请人： Ming Zhong Ding , Kian Keong Ooi , Wei Wei Sun , Chiap Heok Ang , Beng Wee Quak
发明人： Ming Zhong Ding , Kian Keong Ooi , Wei Wei Sun , Chiap Heok Ang , Beng Wee Quak
IPC分类号： G11B509
CPC分类号： G11B5/59644
摘要： A servo writer writes servo information to at least one disc of a head disc assembly. The servo writer includes a clock head that writes a clock track to the at least one disc and generates a clock signal when the clock head reads the clock track on the at least one disc. A servo pattern generator writes servo patterns to the at least one disc in response to the clock signal generated by the clock head reading the clock track on the at least one disc. The servo track writer also includes a phase lock loop clock generator which synchronizes to the clock track and produces the clock signal for the servo pattern generator.
摘要翻译：伺服写入器将伺服信息写入头盘组件的至少一个盘。伺服写入器包括时钟磁头，其将时钟磁道写入至少一个磁盘，并在时钟磁头读取至少一个磁盘上的时钟磁道时产生时钟信号。伺服模式发生器响应于读取时钟磁道在至少一个盘上读取时钟磁头产生的时钟信号将伺服模式写入至少一个盘。伺服磁道写入器还包括锁相环时钟发生器，与时钟磁道同步并产生用于伺服模式发生器的时钟信号。

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