Xi'an Institute of Optics and Precision Mechanics,CAS
Laser drive and optical disk drive | |
其他题名 | Laser drive and optical disk drive |
AMANO YOSHIRO; SOTOZONO KAZUO; SHIMOUSA TATSUO | |
1992-08-28 | |
专利权人 | 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 |
公开日期 | 1992-08-28 |
授权国家 | 日本 |
专利类型 | 发明申请 |
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. |
其他摘要 | 目的:通过提供流出和流入的恒定电流源以及用于打开或关闭激光的开关装置,以获得用于容易地提高开关速度的激光驱动装置。组成:写数据信号Sd及其反相信号-Sd输入到开关电路40的晶体管(Tr)41A和41B的基极。当Tr41A导通且Tr41B关闭时,开关电流Isa流过Tr41A的流量变为等于流入恒流源20的流入电流Ib,并且流过Tr41B的开关电流Iab变为零。结果,激光电流I1变得等于流出的恒流源30的流出电流Ia,从而接通激光器50.另一方面,当Tr41A关闭并且Tr41B转动时接通时,开关电流Isa变为零,开关电流Isb变得等于流入电流Ib和流出电流Ia,从而将激光电流I1设定为零并关闭激光器50。 |
主权项 | - |
申请日期 | 1991-01-17 |
专利号 | JP1992240787A |
专利状态 | 失效 |
申请号 | JP1991044574 |
公开(公告)号 | JP1992240787A |
IPC 分类号 | G11B7/125 | G11B7/126 | H01S5/042 | H01S3/096 |
专利代理人 | - |
代理机构 | - |
文献类型 | 专利 |
条目标识符 | 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[P]. 1992-08-28. |
条目包含的文件 | ||||||
文件名称/大小 | 文献类型 | 版本类型 | 开放类型 | 使用许可 | ||
JP1992240787A.PDF(98KB) | 专利 | 开放获取 | CC BY-NC-SA | 请求全文 |
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