CAPMID design in VRFD for HDR structure
US12294801B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2023 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | Aug 18, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pixel circuit includes a photodiode configured to photo generate image charge in response to incident light, a floating diffusion coupled to receive the image charge from the photodiode, a transfer transistor coupled between the photodiode and the floating diffusion to transfer the image charge from the photodiode to the floating diffusion, a reset transistor coupled between a variable voltage source and the floating diffusion, wherein the reset transistor is configured to be switched in response to a reset control signal, and a lateral overflow integration capacitor (LOFIC) coupled between the variable voltage source and the floating diffusion. The variable voltage source is configured to output a high-voltage level during a high conversion gain (HCG) reset signal readout and an HCG image signal readout, and a mid-voltage level during a LOFIC image signal readout and a LOFIC reset signal readout.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.