Image sensor capable of cancelling offset voltage of semiconductor device included therein
US7301487B2 · kind B2 · utility
12Cited by
1References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 8, 2006 |
| Grant date | Nov 27, 2007 |
| Priority date | — |
| Expiry date | May 8, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image sensor includes: a pixel unit that outputs a first signal including an offset voltage inherent to a pixel; a CDS unit that performs correlated double sampling of a second signal that is obtained from the first signal by canceling the offset voltage inherent to the pixel, and outputs the second signal after the correlated double sampling as a third signal including an offset voltage due to the CDS unit; and an ADC unit that performs analog-to-digital conversion of a fourth signal that is obtained from the third signal by canceling the offset voltage due to the CDS unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.