Diode driver circuit utilizing discrete-value DC current source
US5111065A · kind A · utility
36Cited by
7References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1990 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Mar 23, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F1/468
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A diode driver circuit has an adjustable, fixed-value current source and a variable offset current source for drawing a bias current through a laser diode. A Darlington pair buffer circuit isolates the diode from the rest of the driver circuit. The output current of the offset current source is controlled by a number of digital-to-analog converters each controlling a different contribution to the total offset current. A diode protector circuit protects the diode when the system is in an inactive state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.