Device for detecting electromagnetic radiations
US7071471B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 25, 2003 |
| Grant date | Jul 4, 2006 |
| Priority date | — |
| Expiry date | Aug 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A device for detecting electromagnetic radiations implements a detection circuit associated with a reading circuit. The detection circuit includes an array of detection pixels, each comprising a thermal detector of biased bolometric type, and delivering an electric current signal representative of detected radiation. The signal undergoes a double baselining, respectively: a global baselining carried out by means of a thermally isolated bolometer, ensuring extraction from the signal, of a first current of constant value inherent to the biasing of the thermal detector, and an adaptive baselining specific to each of the pixels, carried out by a programmable current generator generating a current for subtraction from the current signal, as a function of the dispersion inherent to the pixel considered relative to a reference signal and stored in an associated memory integrated at the level of each of the pixels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.