Optical system laser driver with a built in output inductor for improved frequency response
US7411986B2 · kind B2 · utility
0Cited by
3References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 25, 2004 |
| Grant date | Aug 12, 2008 |
| Priority date | — |
| Expiry date | Aug 18, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/06825
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser driver comprises a PNP transistor current source, an inductor coupled to the PNP transistor current source, a switch coupled to the inductor, and a current sink coupled to the switch. The PNP transistor current source supplies a first current to a laser if the switch is closed and a second current to the laser if the switch is open. The PNP transistor current source, inductor, switch, and current sink are on a single semiconductor chip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.