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	Laser diode driving circuit
	HONGOU JINICHI; ITOU SHIYOUICHI
	1984-01-31
著作权人	HITACHI SEISAKUSHO KK
专利号	JP1984018964A
国家	日本
文献子类	发明申请
其他题名	Laser diode driving circuit
英文摘要	PURPOSE:To improve control precision by using a switching and a bias electric currents as driving current and performing light output control by the bias current. CONSTITUTION:Current sources 10A and 10B are current sources for the switching current and bias current. The output of a laser diode (LD) 3 is detected by a photodiode 4 and supplied through an amplifier 14 to a comparator 13, where it is compared with a reference voltage. Then, the output of the comparator 13 is supplied to a U/D counter 12, which counts up or down. Its counted value is converted by a D/A converter 11 into an analog value, which controls the capacity of the current source 10B to vary the bias current, performing constant-output control over the LD 3. Thus, the object under the constant-output control is only the bias current and reduced in range, so the control precision is improved.
公开日期	1984-01-31
申请日期	1982-07-23
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/68665]
专题	半导体激光器专利数据库
作者单位	HITACHI SEISAKUSHO KK
推荐引用方式 GB/T 7714	HONGOU JINICHI,ITOU SHIYOUICHI. Laser diode driving circuit. JP1984018964A. 1984-01-31.

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