Correlated double sampling ping-pong architecture
US8106987B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 2007 |
| Grant date | Jan 31, 2012 |
| Priority date | — |
| Expiry date | May 31, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/75
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus can be arranged with a correlated double sampler circuit (CDS) for processing an output signal from an imaging device such as a charge-coupled device (CCD) image sensor. The correlated double sampling (CDS) circuit is described that includes an amplifier and a reduced number of capacitors that are dynamically configured using a ping-pong architecture. The described ping-pong architecture has relaxed requirements for sampling points, minimized gain mismatch error, and offset mismatches can be easily managed. The ping-pong architecture is useful in digital imaging applications such as digital scanners, digital copiers, digital cameras, and digital camcorders, to name a few.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.