Invention Grant
US07567054B2 Control circuit and method of controlling rotation frequency of spindle in optical disc drive for reducing frequency difference of output signals respectively corresponding to different disc rotation modes 失效
控制电路和控制光盘驱动器中主轴旋转频率的方法,以减少分别对应不同光盘旋转模式的输出信号的频差

  • Patent Title: Control circuit and method of controlling rotation frequency of spindle in optical disc drive for reducing frequency difference of output signals respectively corresponding to different disc rotation modes
  • Patent Title (中): 控制电路和控制光盘驱动器中主轴旋转频率的方法,以减少分别对应不同光盘旋转模式的输出信号的频差
  • Application No.: US11307962
    Application Date: 2006-03-01
  • Publication No.: US07567054B2
    Publication Date: 2009-07-28
  • Inventor: Yu-Hsuan LinJin-Bin YangChih-Ching ChenGwo-Huei Wu
  • Applicant: Yu-Hsuan LinJin-Bin YangChih-Ching ChenGwo-Huei Wu
  • Applicant Address: TW Hsin-Chu Hsien
  • Assignee: Media Tek Inc.
  • Current Assignee: Media Tek Inc.
  • Current Assignee Address: TW Hsin-Chu Hsien
  • Agent Winston Hsu
  • Main IPC: H02P27/04
  • IPC: H02P27/04
Control circuit and method of controlling rotation frequency of spindle in optical disc drive for reducing frequency difference of output signals respectively corresponding to different disc rotation modes
Abstract:
A control circuit and a control method of controlling a rotation frequency of a spindle in an optical disc drive, the control circuit comprising: a spindle controller, electrically coupled to the spindle, for driving the spindle to rotate an optical disc according to a rotation control signal; a detector, electrically coupled to the spindle controller, for detecting the rotation frequency and for generating detecting signals; a frequency-adjusting module, electrically coupled to the detector, for adjusting at least one of the detecting signals to reduce a rotation frequency difference between detecting signals; a signal selector, electrically coupled to the frequency-adjusting module, for receiving output signals generated from the frequency-adjusting module and then outputting the rotation control signal.
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