Invention Grant
US08134805B2 Silent retract of heads in a hard disk drive 失效
在硬盘驱动器中静音收回磁头

  • Patent Title: Silent retract of heads in a hard disk drive
  • Patent Title (中): 在硬盘驱动器中静音收回磁头
  • Application No.: US12416621
    Application Date: 2009-04-01
  • Publication No.: US08134805B2
    Publication Date: 2012-03-13
  • Inventor: Bong Jin Lee
  • Applicant: Bong Jin Lee
  • Main IPC: G11B5/54
  • IPC: G11B5/54
Silent retract of heads in a hard disk drive
Abstract:
A hard disk drive with an actuator arm assembly that is coupled to a head and includes a voice coil motor. The drive also includes a drive circuit that provides a drive current to the voice coil motor to move the actuator arm assembly into contact with a magnet. The drive circuit limits an amplitude, and/or changes the pulse width, of the drive current as the actuator arm assembly approaches the magnet. Limiting the amplitude and/or changing the pulse widths reduces any audible noise associated with retracting the heads.
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