Cascaded multiplying current mirror driver for LED's
US5701133A · kind A · utility
14Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1994 |
| Grant date | Dec 23, 1997 |
| Priority date | — |
| Expiry date | Oct 13, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/564
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A circuit for driving light emitting diodes with a precise amount of current in response to an input pulse is disclosed. The input pulse drives a transistor into saturation, and the collector current of this transistor is increased in value through the use of two cascaded multiplying current mirrors. The second current mirror directly drives the light emitting diodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.