High-energy suppression for capacitor transimpedance amplifier (CTIA)-based imagers or other imaging devices
US11843355B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 4, 2022 |
| Grant date | Dec 12, 2023 |
| Priority date | — |
| Expiry date | Feb 4, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45514
- WIPO fieldBasic communication processes
- 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 reference voltage, (ii) a feedback capacitor coupled in parallel across the amplifier, and (iii) a reset switch coupled in parallel across the feedback capacitor. The apparatus further includes an event detector configured to sense a high-energy event affecting the photodetector. In addition, the apparatus includes a switchable clamp coupled across inputs of the amplifier, where the event detector is configured to close the switchable clamp in response to sensing the high-energy event.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.