Method, apparatus and system providing configurable current source device for image sensors
US7157683B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 16, 2004 |
| Grant date | Jan 2, 2007 |
| Priority date | — |
| Expiry date | Mar 2, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A configurable current source for imager readout system that can be operated as a simple-current-source or as a cascode-current-source. The configurable current source can be operated in a simple-current-source mode during circumstances when a low power supply voltage or large output signal swing is needed to output a pixel signal. The configurable current source can also be operated in a cascode-current-source mode for reduced nonlinearity and column-wise fixed pattern noise when power from a power supply is not a limitation. The configurable current source provides design flexibility and pixel optimization for imager development.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.