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	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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