Device for detecting electromagnetic radiation
US8283634B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 24, 2009 |
| Grant date | Oct 9, 2012 |
| Priority date | — |
| Expiry date | Aug 25, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/76
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a device for detecting electromagnetic radiation comprising: a resistive bolometer, a biasing circuit capable of biasing said bolometer with a predetermined bias voltage, a rejection module capable of generating a common mode current, a measuring circuit capable of being connected to a bolometer and a rejection module in order to measure the difference between the current flowing through the bolometer when it is biased and the common mode current generated by the rejection module. According to the invention, rejection module comprises: a module for estimating a current that flows through resistive bolometer when it is subjected to the bias voltage and made insensitive to the electromagnetic radiation; and a current generator which is controlled by the estimation module and generates the current estimated by the latter as a common mode current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.