发明授权
US5493549A Optical recording regeneration apparatus with compensation circuit 失效
带补偿电路的光记录再生装置

  • 专利标题: Optical recording regeneration apparatus with compensation circuit
  • 专利标题(中): 带补偿电路的光记录再生装置
  • 申请号: US343270
    申请日: 1994-11-22
  • 公开(公告)号: US5493549A
    公开(公告)日: 1996-02-20
  • 发明人: Takao Miyazawa
  • 申请人: Takao Miyazawa
  • 申请人地址: JPX Tokyo
  • 专利权人: Seiko Epson Corporation
  • 当前专利权人: Seiko Epson Corporation
  • 当前专利权人地址: JPX Tokyo
  • 优先权: JPX2-94621 19900410
  • 主分类号: G11B7/125
  • IPC分类号: G11B7/125 G11B27/36
Optical recording regeneration apparatus with compensation circuit
摘要:
An optical recording regeneration apparatus with a compensation circuit is provided. In the apparatus, a recording state detection circuit detects the recording state of recorded data and generates state data indicative of the recording state. A modulation control circuit compares the state data with a specified value and generates the comparison results. A drive circuit adjusts the power level and/or the pulse width of the laser beam in accordance with the comparison results. Thus, the power level and/or the pulse width of the laser beam can maintain at an optimum value without being affected by variations in disk recording sensitivity resulting from temperature or other changes over time.
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