Laser power-drive circuit having a scaling DAC supplying a scaled reference signal to a plurality of scaled DAC's that supply a plurality of scaled output signals
文献类型：专利
| 作者 | CALL, DAVID ERNEST; HRINYA, STEPHEN J.; HURST, JR., JERRY ELDEN; JAQUETTE, GLEN ALAN; JULIANA, JR., ANTHONY |
| 发表日期 | 1997-06-17 |
| 专利号 | US5640381 |
| 著作权人 | INTERNATIONAL BUSINESS MACHINES CORPORATION |
| 国家 | 美国 |
| 文献子类 | 授权发明 |
| 其他题名 | Laser power-drive circuit having a scaling DAC supplying a scaled reference signal to a plurality of scaled DAC's that supply a plurality of scaled output signals |
| 英文摘要 | An optical disk recorder employs laser drive signals having diverse current or power levels. A scaling digital-analog-converter (DAC) supplies a scaled reference signal to a plurality of scaled DACs. The scaled DACs supply the diverse laser drive signals. Calibrating the scaling DAC calibrates the scaled DACs. A base array of DACs include not only the scaling DAC but a plurality of base array DACs. Such base array DACs control reading operations as well as supplying a threshold current. The threshold current is that laser drive signal current level below which laser 25 does not emit a laser beam. During writing, the CUT current is added to the laser drive currents supplied by the scaled DACs. A desired CUT current is determined by calculating a slope of the laser drive current to emission of radiation. Then the slope is extrapolated to a zero emission point below which no coherent emission of radiation occurs. |
| 公开日期 | 1997-06-17 |
| 申请日期 | 1996-03-08 |
| 状态 | 失效 |
| 源URL | [http://ir.opt.ac.cn/handle/181661/33523]  |
| 专题 | 半导体激光器专利数据库 |
| 作者单位 | INTERNATIONAL BUSINESS MACHINES CORPORATION |
| 推荐引用方式 GB/T 7714 | CALL, DAVID ERNEST,HRINYA, STEPHEN J.,HURST, JR., JERRY ELDEN,et al. Laser power-drive circuit having a scaling DAC supplying a scaled reference signal to a plurality of scaled DAC's that supply a plurality of scaled output signals. US5640381. 1997-06-17. |
入库方式： OAI收割
来源：西安光学精密机械研究所
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