Image sensor including heterogeneous analog to digital convertor with different noise characteristics
US9537501B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2014 |
| Grant date | Jan 3, 2017 |
| Priority date | — |
| Expiry date | Apr 8, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image sensor in accordance with exemplary embodiments of the inventive concept may include a pixel sensor array which includes an active pixel sensor and an optical black pixel sensor; a first analog to digital converter configured to convert a first sensing signal, which is provided from the active pixel sensor, to a first digital signal; a second analog to digital converter configured to convert a second sensing signal, which is provided from the optical black pixel sensor, to a second digital signal; and an output buffer configured to temporarily store and output the first digital signal and the second digital signal, wherein a plurality of noise characteristics of the second analog to digital converter is different from a plurality of noise characteristics of the first analog to digital converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.