Image sensor with high conversion gain (HCG) mode and low conversion gain (LCG) mode
US12108173B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2023 |
| Grant date | Oct 1, 2024 |
| Priority date | — |
| Expiry date | Jun 5, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image sensor includes a pixel configured to operate in a high conversion gain (HCG) mode and a low conversion gain (LCG) mode during a readout period, and a correlated double sampling (CDS) circuit configured to generate a comparison signal based on a ramp signal and a pixel voltage received from the pixel, wherein the CDS circuit includes a comparator configured to: receive the pixel voltage through a first input node, receive the ramp signal through a second input node based on an LCG reset signal or an LCG image signal being received as the pixel voltage, and receive the ramp signal through a third input node based on an HCG reset signal or an HCG image signal being received as the pixel voltage; and compare the ramp signal to the pixel voltage, and output the comparison signal corresponding to a comparison result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.