Solid-state imaging device with offset current generation
US12219277B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 17, 2021 |
| Grant date | Feb 4, 2025 |
| Priority date | — |
| Expiry date | Jan 30, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Solid-state imaging devices are disclosed. In one example, a solid-state imaging device includes an AD converter that obtains an electric signal from a pixel and performs AD conversion on the electric signal. The electric signal is compared with a reference signal that has a voltage changing with the lapse of time. The reference signal is generated by a reference signal generator with a first current circuit that causes a first current to flow, an output circuit including a first input unit connected to the first current circuit, a second input unit that receives a reference voltage for determining an initial value of the reference signal, and an output unit that outputs the reference signal on the basis of voltages of the first input unit and the second input unit. A first capacitive element changes the reference signal by accumulating or discharging the first current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.