发明授权
- 专利标题: FOKUS-REGELUNG FÜR EIN GERÄT FÜR PLATTENFÖRMIGE, ROTIERENDE INFORMATIONSTRÄGER
- 专利标题(英): Focus regulation for an apparatus for disc-shaped rotating information supports
- 专利标题(中): 用于旋转旋转信息支持的设备的重点规定
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申请号: EP86901367.2申请日: 1986-01-24
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公开(公告)号: EP0211912B1公开(公告)日: 1990-09-12
- 发明人: BAAS, Dieter , KURZ, Arthur
- 申请人: Deutsche Thomson-Brandt GmbH
- 申请人地址: Postfach 1307 78003 Villingen-Schwenningen DE
- 专利权人: Deutsche Thomson-Brandt GmbH
- 当前专利权人: Deutsche Thomson-Brandt GmbH
- 当前专利权人地址: Postfach 1307 78003 Villingen-Schwenningen DE
- 优先权: DE3503983 19850206
- 国际公布: WO8604721 19860814
- 主分类号: G11B7/09
- IPC分类号: G11B7/09
摘要:
The focusing adjustment of a record player for rotary optical reading information supports (1) comprises an optical reader (4) which has a transducer-controlled focusing actuator (3). The loop gain of the regulation circuit is controlled by a control signal which, from the read HF-EFM-signal, influences in a plurality of steps the gain of the regulation circuit as a function of the type and the frequency of a disc faults which modify the controlling magnitude.
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