发明名称 |
Track control circuit for optical card recording/reproducing apparatus |
摘要 |
In a track control circuit for an optical car recording/reproducing apparatus, a light beam for optically recording or reproducing information is incident on a desired track of an optical card having a plurality of tracks through a focusing lens. A beam reflected by a desired track of the optical card is detected by a photosensor, and a track error signal is generated as a signal representing a deviation of the reflected beam. A track actuator moves the focusing lens in horizontal and vertical directions so as to position the focusing lens on the track of the optical card in accordance with a track error signal gain-controlled by a variable gain amplifier. The variable gain amplifier receives a control signal from a CPU so as to change the gain of the track error signal in accordance with the amplitude of the generated track error signal.
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申请公布号 |
US5293365(A) |
申请公布日期 |
1994.03.08 |
申请号 |
US19930090985 |
申请日期 |
1993.07.12 |
申请人 |
OLYMPUS OPTICAL CO., LTD. |
发明人 |
ROKUTAN, TAKAO |
分类号 |
G11B7/09;(IPC1-7):G11B7/095 |
主分类号 |
G11B7/09 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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