发明授权
- 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
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申请号: US343270申请日: 1994-11-22
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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
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.
公开/授权文献
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