Fast multi-sampling in image sensors
US11252369B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 2, 2020 |
| Grant date | Feb 15, 2022 |
| Priority date | — |
| Expiry date | Oct 12, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A readout circuit includes a ramp generator for generating a plurality of first short ramps having a first level in a reset conversion phase and a plurality of second short ramps having a second level greater than the first level and a full-scale ramp having a third level greater than the second level in a signal conversion phase, a comparator for comparing a first analog signal with each one of the first short ramps to obtain a plurality of first comparison results in the reset conversion phase, and comparing a second analog signal with each one of the second short ramps and the full-scale ramp in the signal conversion phase to generate a plurality of second comparison results and a third comparison result, and a controller configured to determine an output signal value of the second analog signal according to the plurality of second comparison results and the third result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.