公开(公告)号：US07145744B1

公开(公告)日：2006-12-05

申请号：US11196076

申请日：2005-08-03

Applicant: William W. Clawson ,  Tomas D. Hugunin

Inventor： William W. Clawson ,  Tomas D. Hugunin

IPC: G11B21/02 ,  G11B5/09

CPC classification number: G11B5/59655 ,  G11B5/59661 ,  G11B2005/0002

Abstract: Disclosed is a method for reducing spiral write time and clock reference drift while writing spiral reference patterns on a disk of a disk drive. The method includes: controlling a radial location of a head for writing a first band of tracks near one of an outer diameter (OD) circumference of the disk or an inner diameter (ID) circumference of the disk and for writing a second band of tracks near the other of the OD circumference of the disk or the ID circumference of the disk, respectively, wherein a substantial majority of the tracks each include a plurality of servo sectors including a track number and a sync mark; measuring a distance between first and second reference center positions of reference center tracks of the first and second bands of tracks; and writing a spiral reference pattern therebetween.

Abstract translation: 公开了一种在将螺旋参考图形写在磁盘驱动器的盘上时减小螺旋写入时间和时钟参考漂移的方法。 该方法包括：控制头部的径向位置，用于在盘的外径（OD）圆周或盘的内径（ID）圆周之一附近写入第一带轨，并且用于写入第二带轨 靠近磁盘的OD圆周的另一个或磁盘的ID圆周，其中大部分磁道各自包括包括磁道号和同步标记的多个伺服扇区; 测量第一和第二轨道带的参考中心轨迹的第一和第二参考中心位置之间的距离; 并在其间书写螺旋参考图案。

公开(公告)号：US08482873B1

公开(公告)日：2013-07-09

申请号：US12032783

申请日：2008-02-18

Applicant: Jack M. Chue ,  Tomas D. Hugunin ,  William D. Huber

Inventor： Jack M. Chue ,  Tomas D. Hugunin ,  William D. Huber

IPC: G11B5/02

CPC classification number: G11B5/607 ,  G11B5/6029

Abstract: A disk drive is disclosed comprising a plurality of disk surfaces, and a plurality of heads actuated over the respective disk surfaces. In one embodiment, control circuitry generates a pulse duty cycle signal for one of the heads. In another embodiment, the control circuitry generates a first pulse width modulated signal for a first head, and a second pulse width modulated signal for a second head, wherein the second pulse width modulated signal comprises a phase offset from the first pulse width modulated signal.

Abstract translation: 公开了一种磁盘驱动器，其包括多个盘表面，以及在相应的盘表面上致动的多个磁头。 在一个实施例中，控制电路产生用于其中一个磁头的脉冲占空比信号。 在另一实施例中，控制电路产生用于第一磁头的第一脉冲宽度调制信号和用于第二磁头的第二脉冲宽度调制信号，其中第二脉冲宽度调制信号包括与第一脉冲宽度调制信号的相位偏移。

公开(公告)号：US07839595B1

公开(公告)日：2010-11-23

申请号：US12020432

申请日：2008-01-25

Applicant: Jack M. Chue ,  Tomas D. Hugunin

Inventor： Jack M. Chue ,  Tomas D. Hugunin

IPC: G11B21/02

CPC classification number: G11B5/6029 ,  G11B5/6005 ,  G11B5/6058 ,  G11B5/6064

Abstract: A method of selecting a dynamic fly height (DFH) control setting for a head in a disk drive is disclosed. The head is servoed over a disk, and a fly height measurement is generated for the head. A frequency component is extracted from the fly height measurement, and the DFH control setting for the head is adjusted in response to the extracted frequency component.

Abstract translation: 公开了一种选择磁盘驱动器中磁头的动态飞行高度（DFH）控制设置的方法。 头部通过磁盘进行伺服，并为头部产生飞行高度测量。 从飞行高度测量中提取频率分量，并且响应于所提取的频率分量来调整头部的DFH控制设置。