Abstract: The present invention is a device making it possible to guard against the effects of resetting components sensitive to electromagnetic radiation forming an LCD display device. The device consists of a component (81) insensitive to radiation keeping in a memory (82) series of data supplied by the sensitive components and, when there is an incident, it supplies the last valid image to the LCD during the reset. The preferred field of application is that of viewing devices forming the cockpit of aircraft.

Abstract: The present invention relates to the field of devices for mounting and connecting an electronic module in a support comprising guidance and/or rotation means making it possible to position said module. The electronic module is designed to be slotted into an aircraft instrument panel. The module has: a rear face and a front face that are substantially flat and parallel. Means are provided for attaching the module to the instrument panel. The attachments are situated on the front face of the module. At least one connector-module can be plugged in and attached on the rear face of the module. The direction of plugging in the connector-module situated on the rear face is substantially in the plane of the rear face. The support comprises guidance and rotation means making it possible to guide, plug in and insert the module into the instrument panel.

Abstract: The field of the invention is that of serial digital data transmissions. Such digital data is, in particular, of video type. In certain types of transmission, the links used cannot pass direct current. Such is the case in particular with the so-called “AC-coupled” links used in aeronautics for transferring video signals between computers. In this case, it becomes essential to transmit binary words comprising, if possible, similar quantities of zeroes and ones. The subject of the invention is an encoder or a decoder of 9-bit binary words into 10-bit binary words, said 10-bit binary words being designed to be transmitted over links that cannot pass direct current, said binary words comprising between four ones and six ones regardless of the initial 9-bit binary word.

Abstract: The field of the invention is that of transmission interfaces for synchronous digital input signals composed of bits transmitted in series at a frequency of transmission equal to a first integer multiple M of a first clock frequency. The interface according to the invention comprises at least one deserializer operating in over-sampling mode and supplying digital output samples of each bit in parallel. The output samples are transmitted at a second clock frequency, integer multiple N of a third frequency. The third frequency is substantially equal to the first frequency. Each sampled bit is substantially composed of N samples. The interface has an electronic device for frequency-locking the third frequency onto the first clock frequency. The device has means for counting the number of samples composing each sampled bit.

Abstract: The field of the invention is that of connector sockets for electronic boards providing both electrical and optical connection. These connectors are more specifically dedicated to aeronautical applications. The invention relates to a connector socket for an electronic board comprising a mechanical frame, electrical contacts and at least one rigid optical contact placed in a seat of the mechanical frame, the optical contact being essentially comprised of one or two optomechanical ferrules. The inventive socket makes it possible to avoid the use of linking optical fibers between the socket and the optoelectronic conversion modules, while eliminating the drawbacks of integrating of optoelectronic conversion devices in the socket.

Abstract: The field of the invention is that of serial digital data transmissions. Such digital data is, in particular, of video type. In certain types of transmission, the links used cannot pass direct current. Such is the case in particular with the so-called “AC-coupled” links used in aeronautics for transferring video signals between computers. In this case, it becomes essential to transmit binary words comprising, if possible, similar quantities of zeroes and ones. The subject of the invention is an encoder or a decoder of 9-bit binary words into 10-bit binary words, said 10-bit binary words being designed to be transmitted over links that cannot pass direct current, said binary words comprising between four ones and six ones regardless of the initial 9-bit binary word.

Abstract: A fast power supply for an image intensifier tube used in night vision devices. The tube includes a microchannel amplification wafer placed between a photocathode and an output screen. The supply of the tube delivers a reference voltage to a first terminal of the wafer, a variable voltage to the second terminal of the wafer, a variable photocathode voltage and an output screen voltage. The illumination of the output screen is measured by its screen current. Beyond one screen value, and in order to maintain constant output illumination while avoiding dazzle, the voltage at the second terminal of the wafer is slaved to the changes in the screen current and is different from the photocathode voltages fixed. The circuit for controlling the circuit at the second terminal of the wafer includes a high voltage amplifier with transistors having small quiescent consumption and high control speed for decreasing or increasing the voltage as a function of the variations in the screen current.

Abstract: The disclosure relates to cathode-ray tubes that have to be used at a low level of luminance. The cut-off voltage of the tube is modified by using two servo-control loops, the first one as a function of the value of the cathode current and the second one as a function of the luminance value of a zone that is located outside the operational image of the screen and consists of a particular luminophore. Selector means are used to change over from one loop to the other and vice versa as a function of the values of the cathode current and of the luminance of the zone with respect to certain predetermined thresholds.

Abstract: The disclosure relates to fast amplification circuits that are designed to provide an output current of some amperes, proportional to an input voltage, and have a frequency spectrum that may go beyond 1 MHz. A linear amplifier follows the fast variations in the input voltage and gives a load all the output current so long as this current is low. As soon as the output current from the linear amplifier reaches a given value, a chopper amplifier gives a current that causes a reduction in the output current of the linear amplifier. The circuit may be applied, in particular, to the control of deflection coils and as a high efficiency amplification circuit for audiofrequencies.