Column amplifier reset circuit with comparator
US10924701B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2019 |
| Grant date | Feb 16, 2021 |
| Priority date | — |
| Expiry date | Aug 14, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A column amplifier with a comparator for use in an image sensor includes an amplifier coupled to receive an input signal representative of an image charge from a pixel cell of the image sensor. An amplifier auto-zero switch is coupled between an input of the amplifier and an output of the amplifier. A feedback capacitor coupled to an input of the amplifier. An amplifier output switch coupled between the output of the amplifier and the feedback capacitor. A comparator includes a first input coupled the amplifier output switch. A comparator auto-zero switch is coupled between the first input of the comparator and an output of the comparator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.