Correlated double sampling to include a controller to increment and invert a count during a first period and a second period
US8969770B2 · kind B2 · utility
3Cited by
3References
13Claims
0Family size
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Key dates
| Filing date | Sep 7, 2011 |
| Grant date | Mar 3, 2015 |
| Priority date | — |
| Expiry date | Feb 23, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus and a method for correlated double sampling using an up-counter for parallel image sensors. All bits of a counter are set to one. An offset signal is compared to a first reference signal to define a first period during which the counter is incremented. After the first period, all bits of the counter are inverted. A sensor signal is compared to a second reference signal to define a second period during which the counter is incremented to generate a correlated double sampling value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.