Solid-state image sensing element and image sensing system including comparison units with switchable frequency band characteristics
US8922668B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2010 |
| Grant date | Dec 30, 2014 |
| Priority date | — |
| Expiry date | Dec 3, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/56
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a solid-state image sensing element which includes a pixel array portion in which a plurality of pixels each including a photoelectric converter are arranged two-dimensionally, and readout circuits which read out analog pixel signals from the pixel array portion by column, and in which each of the readout circuits includes an A/D conversion circuit which converts the analog pixel signal from the pixel array portion into a digital pixel signal, and the A/D conversion circuit performs A/D conversion by comparing, by a comparison unit, a signal level of the analog pixel signal from the pixel array portion with a temporally changing reference level, a frequency band characteristic of the comparison unit is switched in accordance with the signal level of the analog pixel signal from the pixel array portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.