Compact readout circuit and a method for reading a pixel using a compact readout circuit
US10205903B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2016 |
| Grant date | Feb 12, 2019 |
| Priority date | — |
| Expiry date | Feb 9, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/771
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device comprising a pixel and a readout circuit, wherein the pixel is coupled to the readout circuit; wherein the readout circuit comprises a current control circuit and a comparator; wherein the current control circuit is configured to (a) charge the current control circuit to a pixel affected charge using at least a pixel affected current that is indicative of an electrical parameter of the pixel and (b) drain, based on the pixel affected charge, a current control circuit current during a comparison period; wherein the comparator is configured to compare, during the comparison period, between a pixel affected voltage and a reference signal that changes during the comparison period and to provide at least one pulse that has is indicative of a value of the pixel affected voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.