Device for the detection of an electromagnetic radiation and electromagnetic radiation detector comprising such devices
US8232525B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 2009 |
| Grant date | Jul 31, 2012 |
| Priority date | — |
| Expiry date | Nov 23, 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 the detection of an electromagnetic radiation including: a substrate; a resistive imaging bolometer; a circuit for polarizing the bolometer at a predetermined voltage; a rejection circuit generating a common mode current, comprising a compensation bolometer thermalized in the substrate and a polarization circuit thereof; and a measuring circuit for measuring the difference between the current flowing in the imaging bolometer when it is polarized and the common mode current generated by the rejection circuit. According to the invention, the rejection circuit further comprises a current generator capable of producing a current that simulates the current induced by the self-heating of the imaging bolometer under the effect of its polarization, the sum of the current passing through the compensation bolometer and the current generated by the current generator forming the common mode current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.