Artifact mitigation in capacitor transimpedance amplifier (CTIA)-based imagers or other imaging devices
US12289554B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 7, 2023 |
| Grant date | Apr 29, 2025 |
| Priority date | — |
| Expiry date | Apr 20, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45514
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus includes a photodetector configured to generate an electrical current based on received illumination. The apparatus also includes a capacitor transimpedance amplifier (CTIA) unit cell having (i) an amplifier configured to receive the electrical current and a first reference voltage and generate a pre-integration voltage, (ii) a feedback capacitor coupled in parallel across the amplifier, (iii) a reset switch coupled in parallel across the feedback capacitor, and (iv) a coupling capacitor coupled to an output of the amplifier and configured to receive the pre-integration voltage and generate an integration voltage. The apparatus further includes a comparator configured to compare the pre-integration voltage and a second reference voltage, where generation of the integration voltage is modifiable based on the comparison.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.