Column-wise clamp voltage driver for suppression of noise in an imager
US7372493B2 · kind B2 · utility
6Cited by
9References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 12, 2004 |
| Grant date | May 13, 2008 |
| Priority date | — |
| Expiry date | Jun 8, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An imager having column-wise clamp voltage drivers. Each clamp voltage driver is substantially identical to the output circuitry of the imager's pixels in that column and is designed to track the noise experienced by the readout pixels. Each clamp voltage driver generates and drives the appropriate clamp voltage to store reset and pixel signals in associated column sample and hold circuitry while suppressing the noise typically experienced during the readout process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.