Patent ID: 8283634

Claim:
A device for detecting electromagnetic radiation comprising: a resistive bolometer comprising a membrane suspended above a substrate, a biasing circuit capable of biasing said bolometer with a predetermined bias voltage, a rejection module capable of generating a common mode current, comprising: an estimation module for estimating current that flows through the 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, and wherein the estimation module comprises: at least one thermal sensor measuring a temperature of the substrate; and digital processing means for calculating the common mode current as a function of the measured temperature of the substrate and a thermal model of the resistive bolometer; a measuring circuit capable of being connected to a bolometer and to the 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.