Comparator for double ramp analog to digital converter
US10079990B2 · kind B2 · utility
5Cited by
3References
6Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 27, 2016 |
| Grant date | Sep 18, 2018 |
| Priority date | — |
| Expiry date | Sep 27, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatuses and method for an image sensor with increased analog to digital conversion range and reduced noise are described herein. An example method may include disabling a first auto-zero switch of a comparator, the first auto-zero switch coupled to auto-zero a reference voltage input of the comparator, adjusting an auto-zero offset voltage of a ramp voltage provided to the reference voltage input of the comparator, and disabling a second auto-zero switch of the comparator, the second auto-zero switch coupled to auto-zero a bitline input of the comparator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.