CTIA for IR readout integrated circuits using single ended OPAMP with in-pixel voltage regulator
US9219449B2 · kind B2 · utility
2Cited by
1References
10Claims
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Key dates
| Filing date | Jul 23, 2013 |
| Grant date | Dec 22, 2015 |
| Priority date | — |
| Expiry date | Mar 3, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/087
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A circuit for an image sensor pixel receives photogenerated information from an image sensor, such as infrared sensor. The circuit includes a single ended operational amplifier, they can have a simple circuit such as for example 4 transistors. An additional transistor is used in the pixel to regulate the voltage that is used to drive the operational amplifier, to maintain that voltage relative to a bias level. This prevents voltage fluctuations, which would otherwise be passed to the pixel output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.