Image sensor with dual conversion gain readout
US10356351B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2018 |
| Grant date | Jul 16, 2019 |
| Priority date | — |
| Expiry date | Feb 7, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/803
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method includes reading a first analog reference signal from a first storage node in a dual conversion gain pixel, and converting the first analog reference signal to a first digital reference signal using a comparator coupled to the dual conversion gain pixel. The method also includes reading a first analog image signal from the first storage node, and converting the first analog image signal to a first digital image signal using the comparator. A second analog image signal may be read from the first storage node and a second storage node in the dual conversion gain pixel, and the second analog image signal may be converted to a second digital image signal. A second analog reference signal may be read from the first storage node and the second storage node, and the second analog reference signal may be converted to a second digital reference signal using the comparator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.