Low-flux and low-noise detection circuit having a readout circuit with shielded integration node
US8872097B2 · kind B2 · utility
4Cited by
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11Claims
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Key dates
| Filing date | May 21, 2012 |
| Grant date | Oct 28, 2014 |
| Priority date | — |
| Expiry date | Feb 8, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/811
Abstract
The detection circuit of the Source Follower per Detector type comprises a photodiode connected to an integration node. A biasing circuit makes it possible to bias the photodiode between a first reverse-bias state and a second floating state. A readout circuit is connected to the integration node for generating a signal representative of the scene observed by the photodiode. A metal shielding is arranged around the integration node. The metal shielding is connected to an output of the readout circuit configured to have a potential varying in the same direction as the potential at the integration node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.