发明名称 |
Beam controller for magneto-optical disc memory system |
摘要 |
A beam controller for controlling a semiconductor laser included in an optical recording-play-back apparatus. The beam controller is comprised of first and second current sources for driving the semiconductor laser at a low level during a play-back mode and at a high level during an erasing mode. The first and second current sources are respectively automatically controlled by a first and second auto-power control circuit to provide stable power outputs.
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申请公布号 |
US4843604(A) |
申请公布日期 |
1989.06.27 |
申请号 |
US19860919672 |
申请日期 |
1986.10.16 |
申请人 |
SHARP KABUSHIKI KAISHA |
发明人 |
FUJIWARA, TETSUO;FUJI, HIROSHI;IWAKI, TAKASHI;DEGUCHI, TOSHIHISA;KOBAYASHI, SHOZOU |
分类号 |
G11B7/125;G11B11/105;G11B19/02 |
主分类号 |
G11B7/125 |
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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