Semiconductor laser modulating circuit
文献类型：专利
| 作者 | OZAWA YASUYUKI; MORITSUGU MASAHARU; IWAMOTO TOSHITAKA |
| 发表日期 | 1984-12-13 |
| 专利号 | JP1984221842A |
| 著作权人 | FUJITSU KK |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Semiconductor laser modulating circuit |
| 英文摘要 | PURPOSE:To make the change of a medium surface due to write uniform by varying a write current to a recording medium stepwise in accordance with relative speeds of a recording head and the recording medium. CONSTITUTION:A control terminal P which changes an output current i2 is provided in a constant current power supply circuit 4' to change the current i2 in accordance with a write position on an optical disc surface, and the voltage between both ends of a resistance R of a detecting circuit 9 is supplied to an operational amplifier K, and the output of the circuit 9 is inputted to an amplifier 7 as a detection signal. Meanwhile, the optical output of an LD1 which emits light in accordance with a current (i1+i2) at a write time is converted photoelectrically by a photosensor 5, and the output of a detecting circuit 6 and the output of the amplifier 7 are inputted to a subtractor 8, and the subtraction output is supplied to a driving circuit 2 to drive the LD |
| 公开日期 | 1984-12-13 |
| 申请日期 | 1983-05-30 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/59328]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | FUJITSU KK |
| 推荐引用方式 GB/T 7714 | OZAWA YASUYUKI,MORITSUGU MASAHARU,IWAMOTO TOSHITAKA. Semiconductor laser modulating circuit. JP1984221842A. 1984-12-13. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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