CTIA in-pixel correlated double sampling with snapshot operation for IR readout integrated circuits
US9172873B2 · kind B2 · utility
3Cited by
4References
13Claims
0Family size
Assignee
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Key dates
| Filing date | May 31, 2013 |
| Grant date | Oct 27, 2015 |
| Priority date | — |
| Expiry date | Dec 11, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image sensor array that has a buffer amplifier, having a capacitor which receives photogenerated energy from a photodetector, and stores the photo generated energy in a capacitor of the buffer amplifier. A reset across the buffer amplifier is applied at a time which is sufficient to allow the amplifier to settle transiently prior to applying the clamp voltage. There is also a source follower that is enabled to operate at a time just before snapshot operation, and then turned off when the snapshot is over, to save on power.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.