Digital correlated double sampling using dual analog path
US7456879B2 · kind B2 · utility
11Cited by
5References
18Claims
0Family size
Assignee
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Key dates
| Filing date | Aug 29, 2003 |
| Grant date | Nov 25, 2008 |
| Priority date | — |
| Expiry date | May 11, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/76
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imaging system implements digital correlated double sampling (CDS) using dual channels. One channel converts reset voltages from pixel sensors to digital reset values, while the other channel converts integrated voltages from pixel sensors to digital integrated values. Timing of an imaging process with digital CDS can accordingly be the same as the timing for an imaging process without digital CDS, regardless of the length of the exposure time. Accordingly, the imaging time and the frame rate for moving images do not suffer when digital CDS is used to improve image quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.