Correlated double sampled (CDS) pixel sense amplifier
US9787923B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 13, 2015 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Jan 13, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/616
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A correlated double sampled (CDS) pixel is provided. The CDS pixel comprises an image sensing device, an inverting amplifier, a capacitor, and first and second switches. The image sensing device generates charge based on image content. The inverting amplifier is in operable communication with the image sensing device. The capacitor is configured as a feedback to the inverting amplifier, wherein the first capacitor configured as a switching capacitor and configured to integrate an image signal received by the image sensing device. The first switch is in operable communication with the inverting amplifier and is configured to control sample timing of a correlated offset signal. The second switch is in operable communication with the image sensing device and is configured to control sample timing of the image signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.