Feedthrough-compensated image sensor
US11012649B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2019 |
| Grant date | May 18, 2021 |
| Priority date | — |
| Expiry date | Jul 3, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/18
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A control pulse is generated a first control signal line coupled to a transfer gate of a pixel to enable photocharge accumulated within a photosensitive element of the pixel to be transferred to a floating diffusion node, the first control signal line having a capacitive coupling to the floating diffusion node. A feedthrough compensation pulse is generated on a second signal line of the pixel array that also has a capacitive coupling to the floating diffusion node. The feedthrough compensation pulse is generated with a pulse polarity opposite the pulse polarity of the control pulse and is timed to coincide with the control pulse such that capacitive feedthrough of the control pulse to the floating diffusion node is reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.