Laser diode driving circuit
US6826215B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2001 |
| Grant date | Nov 30, 2004 |
| Priority date | — |
| Expiry date | Oct 25, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01S5/0428
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A laser diode driving circuit is provided, which is capable of supplying a laser diode thereof with a high-speed pulse current. A current source supplies a current to the laser diode. An NMOS transistor as a first switch is connected between the current source and the laser diode. An NMOS transistor as a second switch is connected between a junction between the current source and the first switch and a pseudo load. A controller supplies a first voltage pulse signal to the first switch and a second voltage pulse signal opposite in phase to the first voltage pulse signal to the second switch to switch the first and second switches in a complementary manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.