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	Laser drive and optical disk drive
	AMANO YOSHIRO; SOTOZONO KAZUO; SHIMOUSA TATSUO
	1992-08-28
著作权人	インターナショナル·ビジネス·マシーンズ·コーポレイション
专利号	JP1992240787A
国家	日本
文献子类	发明申请
其他题名	Laser drive and optical disk drive
英文摘要	PURPOSE: To obtain a laser drive device for increasing a switching speed easily, by providing both flow-out and flow-in constant current sources and a switching means for turning laser on or off. CONSTITUTION: A write data signal Sd and its inverted signal -Sd are inputted to the bases of transistors(Tr) 41A and 41B of a switch circuit 40. When the Tr41A is turned on and the Tr41B is turned off, a switch current Isa that flows through the Tr41A becomes equal to the flow-in current Ib of a flow-in constant current source 20, and a switch current Iab that flows through the Tr41B becomes zero. As a result, a laser current I1 becomes equal to an flow-out current Ia of a flow-out constant current source 30, thus turning on a laser 50. On the other hand, when the Tr41A is turned off and the Tr41B is turned on, the switch current Isa becomes zero and the switch current Isb becomes equal to the flow-in current Ib and the flow-out current Ia , thus setting the laser current I1 to zero and turning off the laser 50.
公开日期	1992-08-28
申请日期	1991-01-17
状态	失效
内容类型	专利
源URL	[http://ir.opt.ac.cn/handle/181661/59706]
专题	半导体激光器专利数据库
作者单位	インターナショナル·ビジネス·マシーンズ·コーポレイション
推荐引用方式 GB/T 7714	AMANO YOSHIRO,SOTOZONO KAZUO,SHIMOUSA TATSUO. Laser drive and optical disk drive. JP1992240787A. 1992-08-28.

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