Patent ID: 8232525
Filing Date: 2012-07-31
Classification: G01J

Abstract:
1. A device for the detection of an electromagnetic radiation including: a substrate; a resistive imaging bolometer comprising a bolometric membrane suspended above the substrate; a circuit for polarizing the imaging bolometer and capable of polarizing it at a predetermined polarization voltage; a rejection circuit capable of generating a common mode current, the rejection circuit comprising a compensation bolometer thermalized in the substrate and a circuit for polarizing the compensation bolometer; and a measuring circuit capable of being connected to the imaging bolometer and to the rejection circuit in order to measure the difference between the current flowing in the imaging bolometer when it is polarized and the common mode current generated by the rejection circuit, wherein 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.