Semiconductor laser drive circuit | |
YOSHIKAWA YUKIO; ISHII TAKESHI; OYAMA YOSHIHIRO; SATO SHINICHI; WATANABE MITSUO | |
1991-10-16 | |
著作权人 | 富士通株式会社 |
专利号 | JP1991232288A |
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 inform that the replacement time of a laser diode is getting near by a method wherein the rise time of a monitor signal is checked, and a warning signal is outputted corresponding to the delay of the monitor signal. CONSTITUTION:When a monitored voltage Vmnt exceeds a reference voltage Vcmp, a comparator 25 outputs an inverted signal and detects the rise time of the monitored voltage. A first delay circuit 59 outputs a first delay signal after a delay time set responding to the trailing edge of a lighting signal LDON. A second delay circuit 60 outputs a second delay signal after a delay time set responding to the first delay signal output has elapsed. |
公开日期 | 1991-10-16 |
申请日期 | 1990-02-07 |
状态 | 失效 |
内容类型 | 专利 |
源URL | [http://ir.opt.ac.cn/handle/181661/69089] |
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. JP1991232288A. 1991-10-16. |
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