Abstract: The invention relates to matrix image sensors, and more particularly to a method for correcting the spatial noise caused by the dispersion of the physical properties of the various pixels of the matrix. According to the invention, a signal Xi(L) is established pixel by pixel that corresponds to the illumination of a pixel Pi by a luminance L; a fixed reference K0 is defined for this signal, the value K0 being chosen such that, for a given luminance L0, the pixels all supply an identical signal Xi(L0) that is equal to K0; and a corrected signal X*i(L) is established by applying to the duly referenced signal Xi(L)?K0 a multiplying correcting coefficient specific to the pixel concerned, the correcting coefficient being determined from the signal Xi(Lr) supplied by the pixel Pi for a determined reference luminance Lr which is the same for all the pixels.

Abstract: The invention relates to matrix image sensors, and it relates more particularly to a method for correcting the fixed spatial noise of the matrix. The signal (Sij,n) obtained from each pixel (Pij) during a large number of successive images is collected; for each pixel, an approximate value (Mij) of an average of the signal obtained from the pixel during this large number of images is determined; the signal obtained from each pixel is corrected by adding to it the difference between a reference average value (M0) and the approximate average value. The approximate average is obtained by determining high and low limit values taken by the signal obtained from the pixel during the large number of images, and by calculating a median between these high and low limit values.

Abstract: The invention relates to matrix image sensors, and it relates more particularly to a method for correcting the spatial noise generated by the dispersion of the physical properties of the different individual sensitive dots, or pixels, of the matrix. For each pixel, in an individual electronic circuit associated with the pixel, a recursively digital method is used to determine an approximate value (Mij,n) of an average of the signal Sij,n obtained from the pixel during this large number of images; the signal obtained from each pixel is corrected according to the determined approximate average value and according to a reference average value (M0), and a corrected signal S*ij,n is transmitted from the circuit associated with the pixel.

Abstract: A microelectronic device for electromagnetic radiation measurement including a bolometer and an integrator including an integration capacitor, to output, during an integration time, a first signal with variable amplitude and frequency according to the current emitted by the detector, in a form of a series of pulses, and a controller controlling the first signal, to deliver a second signal. The controller includes: a counting device to count each pulse of the first signal detected during an integration time and to indicate an end of counting when a predetermined number N of pulses is reached, and when the end-of-integration time is reached and a predetermined number N of pulses has been counted or deducted by the counter, to emit a second amplitude signal, depending on or equal to the amplitude of the first signal.

Abstract: The invention relates to matrix image sensors, and more particularly to a method for correcting the spatial noise caused by the dispersion of the physical properties of the various pixels of the matrix. According to the invention, a signal Xi(L) is established pixel by pixel that corresponds to the illumination of a pixel Pi by a luminance L; a fixed reference K0 is defined for this signal, the value K0 being chosen such that, for a given luminance L0, the pixels all supply an identical signal Xi(L0) that is equal to K0; and a corrected signal X*i(L) is established by applying to the duly referenced signal Xi(L)?K0 a multiplying correcting coefficient specific to the pixel concerned, the correcting coefficient being determined from the signal Xi(Lr) supplied by the pixel Pi for a determined reference luminance Lr which is the same for all the pixels.

Abstract: An electronic circuit, for biasing and reading at least one resistive thermal detector, comprising: biasing means able to bias the resistive thermal detector by making a biasing current of substantially constant value flow in the resistive thermal detector when the electrical resistance thereof varies; conversion means able to convert a voltage at the terminals of the resistive thermal detector into a current, comprising at least one MOS-type transistor the gate of which is electrically connected to one of the terminals of the resistive thermal detector; means of generating a base clipping voltage electrically connected to the source of the MOS-type transistor of the conversion means.

Abstract: A device for detecting electromagnetic radiation, including pixels each detecting a radiation and providing an electric current representative of the detected radiation, a column to which the pixels are connected, and transmitting the electric currents provided by the pixels, and an electrical module, to which the transmission column is connected, processing the electric currents provided by the pixels. Each pixel includes a detection circuit including a bolometric detector connected in series to a voltage polarization device of the bolometric detector for adjusting the electric current supplied to the processing module by the transmission column.

Abstract: An analog counter includes, for at least one step, an input for receiving electric pulses and a means for modifying, by consecutive increments or decrements, a storage voltage for each received electrical pulse, a means for resetting the storage voltage, and a comparator for comparing the storage voltage with a threshold voltage and adapted to generate exceedance information. The counter further includes a control means adapted to control the resetting means in the event of the simultaneous detection of exceedance information from the comparator and of an input pulse.

Abstract: The invention relates to matrix image sensors, and it relates more particularly to a method for correcting the spatial noise generated by the dispersion of the physical properties of the different individual sensitive dots, or pixels, of the matrix. For each pixel, in an individual electronic circuit associated with the pixel, a recursively digital method is used to determine an approximate value (Mij,n) of an average of the signal Sij,n obtained from the pixel during this large number of images; the signal obtained from each pixel is corrected according to the determined approximate average value and according to a reference average value (M0), and a corrected signal S*ij,n is transmitted from the circuit associated with the pixel.

Abstract: A thermal image sensor comprising at least: one pixel matrix, wherein each pixel comprises at least one bolometer and means of applying a voltage to the terminals of the bolometer, and a comparator connecting an output of the pixel matrix to an input of the means of applying the voltage to the terminals of the bolometer of each pixel, wherein said comparator is capable of making a comparison between the output signal of the pixel matrix and a reference value, wherein the value of the voltage at the terminals of the bolometer of each pixel is determined at least partially depending on the result of the comparison.

Abstract: The invention relates to matrix image sensors, and it relates more particularly to a method for correcting the fixed spatial noise of the matrix. The signal (Sij,n) obtained from each pixel (Pij) during a large number of successive images is collected; for each pixel, an approximate value (Mij) of an average of the signal obtained from the pixel during this large number of images is determined; the signal obtained from each pixel is corrected by adding to it the difference between a reference average value (M0) and the approximate average value. The approximate average is obtained by determining high and low limit values taken by the signal obtained from the pixel during the large number of images, and by calculating a median between these high and low limit values.

Abstract: Embodiments of the present disclosure relate to an electronic sensor including capture means producing a signals comprising x pulses during a given capture time, such that a?<x<b?, wherein a?, b? and x are non-null natural integers, and counting means receiving the signals, which are incremented with each pulse received, including a maximum counting capacity equal to z such that (b??a?)?z<a?, where z is a non-null natural integer, resetting the counting, when the maximum counting capacity z is exceeded and outputting, at the end of the capture time, a number representative of the number of pulses x of the signals, wherein a? is the minimum value and b? is the maximum value of the number of pulses that can be produced by the capture means.

Abstract: The present invention relates to a device for measuring an electric charge in digitized form. The digitized value is coded on N bits. The device has at least a battery of N capacitors (1, 11) integrating the charge. The capacitors have a common electrode linked to a current source providing the charge. Each capacitor has an individual electrode. The values of the capacitances of the capacitors are in geometric progression. A capacitor corresponds to a bit of the digitized value. Switches (100, 101, 102, 103, 104) are connected to each individual electrode operating according to two phases, connecting the capacitors in parallel in an integration phase so as to integrate the charge in the capacitors (1, 11) and making it possible in a digitization phase to take each of the individual electrodes to two distinct potentials, corresponding to the two logic states of the bit, so as to transfer or not transfer the charge carried by the capacitor to all the other capacitors of the battery.

Abstract: The invention relates to matrix image sensors of the bolometric type, in which each pixel comprises a bolometric resistor whose value varies according to the thermal flow received by the pixel. The resistor is biased by a bias voltage of value Vpol. The current that passes through it is compensated for by a compensation current Icomp, the difference between these currents being integrated in order to produce a measurement signal. The bias voltage (or the compensation current) is adjusted pixel by pixel, for example during a calibration phase, so that all the pixels have an apparent identical sensitivity despite the dispersion of the nominal value of the bolometric resistor. The adjustment is carried out in an analogue manner by storing an individual voltage specific to each pixel in a sensitivity trimmer capacitor specific to this pixel. The capacitor acts directly on the adjustment of the bias voltage or on other parameters playing a role in the sensitivity of the pixel (integration time for example).

Abstract: A thermal image sensor comprising at least: one pixel matrix, wherein each pixel comprises at least one bolometer and means of applying a voltage to the terminals of the bolometer, and a comparator connecting an output of the pixel matrix to an input of the means of applying the voltage to the terminals of the bolometer of each pixel, wherein said comparator is capable of making a comparison between the output signal of the pixel matrix and a reference value, wherein the value of the voltage at the terminals of the bolometer of each pixel is determined at least partially depending on the result of the comparison.

Abstract: The present invention relates to a device for measuring an electric charge in digitized form. The digitized value is coded on N bits. The device has at least a battery of N capacitors (1, 11) integrating the charge. The capacitors have a common electrode linked to a current source providing the charge. Each capacitor has an individual electrode. The values of the capacitances of the capacitors are in geometric progression. A capacitor corresponds to a bit of the digitized value. Switches (100, 101, 102, 103, 104) are connected to each individual electrode operating according to two phases, connecting the capacitors in parallel in an integration phase so as to integrate the charge in the capacitors (1, 11) and making it possible in a digitization phase to take each of the individual electrodes to two distinct potentials, corresponding to the two logic states of the bit, so as to transfer or not transfer the charge carried by the capacitor to all the other capacitors of the battery.

Abstract: Electronic sensor comprising at least: capture means producing a signal s comprising x pulses during a given capture time, such that a?<x<b?, where a?, b? and x are non-null natural integers, counting means receiving the signal s, which are incremented with each pulse received, comprising a maximum counting capacity equal to z such that (b??a?)?z<a?, where z is a non-null natural integer, resetting the counting when the maximum counting capacity z is exceeded and outputting, at the end of the capture time, a number representative of the number of pulses x of the signal s.