Pixel circuit
US10771725B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 3, 2019 |
| Grant date | Sep 8, 2020 |
| Priority date | — |
| Expiry date | Jul 3, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/77
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pixel circuit is provided, where the pixel circuit comprises a photodiode, a buffer circuit, a first capacitor, a first switch, a second switch and a third switch. The photodiode is configured to accumulate charges in response to incident radiation, to generate a photodiode signal. The buffer circuit is configured to output at least one read-out signal, wherein an input terminal of the buffer circuit is coupled to a specific node. The first capacitor is coupled between a control voltage terminal of the pixel circuit and the specific node. The first switch is coupled between the photodiode and the specific node. The second switch is coupled between the input terminal of the buffer circuit and an output terminal of the buffer circuit. The third switch is coupled between the output terminal of the buffer circuit and a read-out terminal of the pixel circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.