Semiconductor laser drive circuit
文献类型：专利
| 作者 | YOSHIKAWA YUKIO; ISHII TAKESHI; OYAMA YOSHIHIRO; SATO SHINICHI; MORIYA KAZUMASA |
| 发表日期 | 1991-10-16 |
| 专利号 | JP1991232283A |
| 著作权人 | 富士通株式会社 |
| 国家 | 日本 |
| 文献子类 | 发明申请 |
| 其他题名 | Semiconductor laser drive circuit |
| 英文摘要 | PURPOSE:To obtain a semiconductor laser drive circuit excellent in safety by a method wherein at least two or more forced quenching circuits independent of each other are provided. CONSTITUTION:A semiconductor laser drive circuit is composed of a current feed circuit which supplies a drive current to a laser diode 1a responding to a lighting signal LDON to start it emitting light, a first forced quenching circuit which stops feeding a drive current to the laser diode 1a to forcedly turn off it responding to a forced stop signal LDINH 1, and a second forced stop circuit which responds to a forced stop signal LDINH 2. When an emergency occurs, the forced stop signal LDINH 1 is made to turn high in level, a transistor 12 becomes non-conductive, the second forced stop signal LDINH 2 is made to turn low in level, a transistor 15 becomes conductive, a voltage between the anode and the cathode of the laser diode 1a becomes smaller than a forward voltage, a current fed from a power supply line Vcc is made to flow through a transistor 15 bypassing the laser diode 1a, so that the laser diode 1a is forcedly turned OFF. |
| 公开日期 | 1991-10-16 |
| 申请日期 | 1990-02-07 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/69091]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | 富士通株式会社 |
| 推荐引用方式 GB/T 7714 | YOSHIKAWA YUKIO,ISHII TAKESHI,OYAMA YOSHIHIRO,et al. Semiconductor laser drive circuit. JP1991232283A. 1991-10-16. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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