Quiescent signal compensated photodetector system for large dynamic range and high linearity
US5057682A · kind A · utility
44Cited by
6References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 5, 1990 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Nov 5, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The linearity and dynamic range of a photodetector system is enhanced by providing real time cancellation of condition-dependent quiescent output signals from the photosensitive devices by provision of a condition-dependent output signal monitoring device which drives the input section of a current mirror having output sections connected to the active photosensitive devices to zero out the condition-dependent quiescent output signals of those photosensitive devices during system operation. Multiple output sections may be run from a single input section of the current mirror.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.