Laser diode drive circuit
US6510168B1 · kind B1 · utility
5Cited by
5References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2000 |
| Grant date | Jan 21, 2003 |
| Priority date | — |
| Expiry date | Jan 17, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/0036
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A drive current Ip used to control the light output from a laser diode LD is controlled by using an output Vsft from a level shift circuit 3. By inserting the level shift circuit 3 between a drive source (V+) and a switch buffer 5, the lower limit (V+)−(V−) of the drive voltage in the circuit is lowered to enable the laser diode drive circuit to be driven at a lower voltage and to achieve a reduction in power consumption.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.