Abstract: The invention relates to a circuit for reading charges comprising a capacitive means (C1, C2) with capacitance Ca to store charges and means of reading a voltage sampled at the terminals of the capacitive means. The capacitive means is built up from a first capacitive means (C1) and a second capacitive means (C2) with a capacitance Cb less than Ca. The read circuit comprises means of comparing the voltage read at the terminals of the capacitive means with a threshold value (Vthreshold) and means of controlling the transfer of charges stored in the first capacitive means to the second capacitive means when the voltage read at the terminals of the capacitive means exceeds the threshold value (Vthreshold). The invention is applicable to detection of radiation in the imagery field.

Abstract: The invention concerns a procedure for converting an analogue signal representing an electrical quantity into a digital signal, the conversion being performed as close as possible to the photo-detector, that is in an integrating PEL. The procedure of the invention consists in scanning the output state of each PEL, row by row, during a frame onto a single bus for all the PELs in a column.

Abstract: Scanning type device for detection of a photonic flux emitted by a scene containing at least one acquisition channel (V) comprising:

Abstract: The invention relates to a reader for an electromagnetic radiation detection element comprising:

Abstract: The invention relates to a circuit for reading charges comprising a capacitive means (C1, C2) with capacitance Ca to store charges and means of reading a voltage sampled at the terminals of the capacitive means. The capacitive means is built up from a first capacitive means (C1) and a second capacitive means (C2) with a capacitance Cb less than Ca. The read circuit comprises means of comparing the voltage read at the terminals of the capacitive means with a threshold value (Vthreshold) and means of controlling the transfer of charges stored in the first capacitive means to the second capacitive means when the voltage read at the terminals of the capacitive means exceeds the threshold value (Vthreshold).

Abstract: The invention concerns a charges circuit reader containing charges storage material (Tc), charges addressing (Ta) and charges/voltage conversion material (Aj) including a conversion capacity, addressing material enabling control of the supply, in the conversion material, of stored charges in the storage material. The circuit includes calibration material (Tccal, Tacal, Il, Ccal) to deliver representative information (Vs) of the charges stored in the stored material and material (K, I2) to select the conversion capacity from the said information.

Abstract: The invention relates to an image sensor with matrix readout including a matrix of elementary photodetectors (P) connected through at least a bus (Bpel) to a remote integrator (I) which converts the signal of each elementary photodetector into a voltage, characterized in that it includes, between the end of the bus and the input of the integrator, an impedance matching device (D) with low output capacitance, delivering at its output, during the time for converting a photodetector signal, a variation of charge which corresponds to an affine function of the charge present at the input of said matching device, wherein this charge variation is determined by: 1 ∫ t = 0 t = Tconv ⁢ Iinj ⁢ ( t ) · ⅆ t = ∫ t = 0 t = Tconv ⁢ I ⁢   ⁢ int ⁢ ( t ) · ⅆ t

Abstract: A method and a device are provided for reading a matrix of photonic detectors which delivers a current whose intensity varies according to the incident flux. A set of elementary points (PEL(i,j)) enables the signals delivered by each detector to be read. The quantity processed is the charge. Each elementary point effects a preintegration of the current delivered by a corresponding detector. A charge amplifier effects a reading to condition the signals delivered by the matrix of detectors and to multiplex them to at least one information processing chain.

Abstract: A device for reading detector arrays with TDI effect comprises an assembly of lines of detectors each integrating its own contribution during an integration time, with each contribution corresponding to an image in one of an array of elementary circuits. A demultiplexer directs the contribution of each detector into a first elementary circuit determined by this detector and the number of the current image. A summing device, executes the sum of the contribution of the detectors consisting in choosing, for each detector, a second elementary circuit determined in function of the number of the current image and of the detector considered and in executing the sum of these elementary circuits so as to carry out the TDI effect on the detectors in such a manner as to obtain the contribution of the detector line.

Abstract: A device and a method of digitalisation for at least one photosensitive detector (DET(i,j)), which supplies a current, the intensity of which varies in relation to the incident flux, and a method for reading a matrix of photonic detectors. The device includes an assembly of elementary points (PEL(i,j)) which enables the signals supplied by each detector to be read. The quantity processed is the charge, each elementary point carrying out a preintegration of the current supplied by a corresponding detector and at least one information processing chain, including a regeneration device which carries out a reading of the resultant charge quantity in the form of a current pulse so as to package the signals supplied by the detectors; the signals coming from the processing chain(s) being multiplexed to at least one digital output.

Abstract: A reduced size solid state camera includes an array of detectors having reading circuits and electronic row and column scanning circuits utilizing CCD-type structures. Each of the column scanning circuits has an integrated part adjacent the detectors with a spacing equal to or smaller than that of the rows of detectors. The movement of the image to be photographed takes place in a direction perpendicular to the columns of detectors and may occur in two successive opposite directions. A scanning circuit for the row supplies a signal representing an image for each image movement direction. The circuitry includes a signal processor which sums up the signals corresponding to the same element of the image that has moved passed all of the detectors of a row.

Abstract: It comprises information photodetection means (2), which have N photodetectors (6), each photodetector being able to supply a current having an information-carrying component and a non-information carrying component, N being an integer at least equal to 1, reading means (4) for the thus detected information and which use for this purpose the current supplied by each photodetector, and N other regulatable means (22) respectively associated with the N photodetectors each other regulatable means being able to extract a regulatable intensity current from the current supplied by the associated photodetector prior to the use of said latter current by the reading means.