Image sensor and electronic device with active reset circuit, and method of operating the same
US9736413B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2016 |
| Grant date | Aug 15, 2017 |
| Priority date | — |
| Expiry date | Feb 3, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/8037
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image sensor including a pixel circuit and an active reset circuit. The pixel circuit includes a light sensing element, a storage node selectively connected to the light sensing element, an output transistor configured to, during a readout operation, output a signal that is based on a potential of the charge storage node to an output line, and a selection transistor that controls the readout operation. The active reset circuit includes a first current path and a second current path, the first current path extending from a power supply node to the output line via the selection transistor and the output transistor, and the second current path extending from the power supply node to the output line via a first transistor and a second transistor. The active reset circuit is configured to, when the selection transistor and the first transistor are both ON, set a potential of the charge storage node based on a potential of a gate of the second transistor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.