Slew rate control circuit for an image sensor
US11070754B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 24, 2020 |
| Grant date | Jul 20, 2021 |
| Priority date | — |
| Expiry date | Mar 24, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/7795
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In an embodiment, an image sensor includes: first and second voltage rails; first and second regulators configured to generate first and second regulated voltage at the first and second voltage rails, respectively; and a plurality of pixels coupled to the first and second voltage rails. Each pixel includes: first and second transistor coupled first and second storage capacitor, respectively. A third transistor is coupled between a control terminal of the first transistor and the first or second voltage rails. The third transistor is configured to limit a slew rate of current flowing between the control terminal of the second transistor and the first or second voltage rails to a first slew rate when the image sensor operates in global shutter mode, and to a second slew rate when the image sensor operates in rolling mode, the first slew rate being smaller than the second slew rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.