Laser driver and optical disk drive apparatus
US5191589A · kind A · utility
15Cited by
2References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 28, 1991 |
| Grant date | Mar 2, 1993 |
| Priority date | — |
| Expiry date | Oct 28, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0427
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
In response to a source current supply and a sink current supply, a switching circuit selectively forms a current path through which a constant source current from the source current supply flows into a laser in order to turn on the laser and a current path through which a constant source current from the source current supply flows into the sink current supply in order to turn off the laser.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.