发明授权
US5347501A Servo apparatus of an optical disc having calibration for gain control
失效
具有用于增益控制的校准的光盘的伺服装置
- 专利标题： Servo apparatus of an optical disc having calibration for gain control
- 专利标题（中）： 具有用于增益控制的校准的光盘的伺服装置
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申请号： US618265申请日： 1990-11-21
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公开(公告)号： US5347501A公开(公告)日： 1994-09-13
- 发明人: Shinichiro Iimura
- 申请人： Shinichiro Iimura
- 申请人地址： JPX
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JPX
- 优先权： JPX1-311722 19891130
- 主分类号： G11B7/085
- IPC分类号： G11B7/085 ; G11B7/09 ; G11B7/00
摘要：
A servo apparatus of an optical disc, comprises an amplitude detector for detecting an amplitude of a servo detection signal which was extracted by an optical pickup when servo focusing is operating. A gain control signal generator generates a gain control signal for providing a predetermined relation between the amplitude detected by the amplitude detector and a reference value. A controller holds the gain control signal generated by the gain control signal generator and controls the amplitude of the servo detection signal by the gain control signal upon a recording or reproducing operation by the optical pickup.
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