Abstract: A device for controlling the efficiency of a scanning active antenna includes at least two transmission paths Txi, a transmission path comprising a phase control module, and a power stage at the output of which a radiating element is arranged, comprising at least: a voltage modulator located upstream of the power stage of each of the radiating elements, a control device transmitting a PWM drain voltage control signal configured so as to manage the gain of a power stage in accordance with a predefined first bias law and to control the phase applied to the drain of the power stage in accordance with a second bias law.

Abstract: A system for adapting the voltage of a drain of a power stage includes at least two transmission paths TXa, a transmission path comprising a resistive element (1n), a phase control module (2n), and a power stage (3n) at the output of which a radiating element (En) is arranged, comprising at least: a device (5n) for determining the value of a reflected power Pr, the value of an incident power Pi in a power stage, and the ratio of the powers R, an analogue device (6n) configured so as to pulse width-modulate the difference signal, a switching cell (7n) receiving a low-power PWM signal and designed to generate a power signal PWMa that is transformed, by a low-pass filter (8n), into a bias signal for biasing the power stage in accordance with a predefined bias control law.

Abstract: A radiofrequency device includes at least the following elements: an antenna, linked to a first transmission channel or reception channel selection device K1, followed by a front-end stage whose output is linked to a second transmission channel or reception channel selection device K2, a group of filters connected between the second selection device K2 and a third transmission channel or reception channel selection device K3, the third selection device K3 is connected to a transceiver, the transceiver comprises a converter part, wherein the group of filters comprises N filters having distinct frequency bands BN in a given bandwidth BT, the group of filters is linked to a manager selecting at least one of the filters Fj of the group of filters in order to attenuate a first type of disturbing signals P1, in the vicinity of the centre frequency of the channel to be received, the transceiver comprises a stage comprising a variable filter, the variable filter is configured in order to eliminate a second type of di

Abstract: A device for controlling the efficiency of a scanning active antenna includes at least two transmission paths Txi, a transmission path comprising a phase control module, and a power stage at the output of which a radiating element is arranged, comprising at least: a voltage modulator located upstream of the power stage of each of the radiating elements, a control device transmitting a PWM drain voltage control signal configured so as to manage the gain of a power stage in accordance with a predefined first bias law and to control the phase applied to the drain of the power stage in accordance with a second bias law.

Abstract: A system for adapting the voltage of a drain of a power stage includes at least two transmission paths TXa, a transmission path comprising a resistive element (1n), a phase control module (2n), and a power stage (3n) at the output of which a radiating element (En) is arranged, comprising at least: a device (5n) for determining the value of a reflected power Pr, the value of an incident power Pi in a power stage, and the ratio of the powers R, an analogue device (6n) configured so as to pulse width-modulate the difference signal, a switching cell (7n) receiving a low-power PWM signal and designed to generate a power signal PWMa that is transformed, by a low-pass filter (8n), into a bias signal for biasing the power stage in accordance with a predefined bias control law.

Abstract: Operating in a low frequency band and a high frequency band, the device includes at least a first amplification module capable of operating in the high band, the amplification of which is modulated according to a tracking of the envelope of the input signal of the device, capable of being linked at the output to an antenna adapted to the high band; a second amplification module capable of operating in the low band and of performing the envelope tracking; a switch switching the output of the second amplification module to an antenna adapted to the low band, when the amplification device is operating in the low band; to the first amplification module to control the drain voltage of the first module according to the envelope tracking, when the amplification device is operating in the high band.

Abstract: Operating in a low frequency band and a high frequency band, the device includes at least a first amplification module capable of operating in the high band, the amplification of which is modulated according to a tracking of the envelope of the input signal of the device, capable of being linked at the output to an antenna adapted to the high band; a second amplification module capable of operating in the low band and of performing the envelope tracking; a switch switching the output of the second amplification module to an antenna adapted to the low band, when the amplification device is operating in the low band; to the first amplification module to control the drain voltage of the first module according to the envelope tracking, when the amplification device is operating in the high band.

Abstract: The invention relates to aircraft instrument panel equipment. According to the invention, the proposal is for an instrument panel which, in addition to a main display system for horizon and necessary piloting parameters, comprises two items of equipment identical from the point of view of hardware and the point of view of software, each provided with a display screen, automatic pilot set point adjustment buttons, computing means and standby data (standby horizon, altitude, speed). In normal operating conditions, one of the items of equipment is configured in an “automatic pilot set point display” mode; its control buttons are used to give the set points to the automatic pilot computer, and the set points are displayed on the screen. The other item of equipment is configured in “integrated standby data display” mode. It displays on the screen the standby horizon, the standby speed and the standby altitude. The mode may be switched at will or in the event of a failure of one of the two items of equipment.

Abstract: The invention relates to a device for facilitating maintenance of a trackball. The device comprises a trackball, a cover inside which the trackball is attached, the cover comprising an opening allowing a movable part of the trackball to appear in order to operate the movable part from outside the cover, the trackball comprising maintenance means. According to the invention, the device comprises means for gaining access to the means of maintaining the trackball from outside the cover.

Abstract: The invention relates to the making safe of a device for inputting data to an item of equipment. The invention is of particular use in the aeronautical field, for example in order to validate data relating to flight conditions. The invention proposes data validation means, of nature different from that of the data input means themselves. For this purpose, the device comprises means (5) for detecting the presence of an operator inputting data and validation means (9) making it possible to take account of the data only if a contact with the operator is detected.

Abstract: The invention relates to aircraft instrument panel equipment. According to the invention, the proposal is for an instrument panel which, in addition to a main display system for horizon and necessary piloting parameters, comprises two items of equipment identical from the point of view of hardware and the point of view of software, each provided with a display screen, automatic pilot set point adjustment buttons, computing means and standby data (standby horizon, altitude, speed). In normal operating conditions, one of the items of equipment is configured in an “automatic pilot set point display” mode; its control buttons are used to give the set points to the automatic pilot computer, and the set points are displayed on the screen. The other item of equipment is configured in “integrated standby data display” mode. It displays on the screen the standby horizon, the standby speed and the standby altitude. The mode may be switched at will or in the event of a failure of one of the two items of equipment.

Abstract: To monitor the reliability of the information provided by a dual optical angular encoder, comprising two pairs of cells for detecting marks borne by a disc, at a given instant, the sequences of at least four successive states taken by the two groups of cells before this instant are compared and the incrementation or decrementation indications given by the two groups are validated if the sequence for a group is either identical or phase-offset by at most one state, ahead or behind, with respect to the sequence of the other group.

Abstract: To monitor the reliability of the information provided by a dual optical angular encoder, comprising two pairs of cells for detecting marks borne by a disc, at a given instant, the sequences of at least four successive states taken by the two groups of cells before this instant are compared and the incrementation or decrementation indications given by the two groups are validated if the sequence for a group is either identical or phase-offset by at most one state, ahead or behind, with respect to the sequence of the other group.

Abstract: The invention relates to the sealing of a keyboard. The invention is particularly, but not exclusively, applicable in a keyboard fitted on an aircraft instrument panel. The keyboard comprises at least one switch, a rigid key allowing an operator to operate the switch, a front face comprising an opening traversed by the rigid key, and sealing means preventing particles from penetrating between the rigid key and the opening. According to the invention, the sealing means comprise a flexible membrane traversed by the rigid key, attached to the key and to the front face.

Abstract: The invention relates to a device for facilitating maintenance of a trackball. The device comprises a trackball, a cover inside which the trackball is attached, the cover comprising an opening allowing a movable part of the trackball to appear in order to operate the movable part from outside the cover, the trackball comprising maintenance means. According to the invention, the device comprises means for gaining access to the means of maintaining the trackball from outside the cover.

Abstract: The present invention relates to a backlighting device, having several brightness levels, for a transmission display screen (12). The device comprises light sources placed in a case (14) between a translucent front wall formed by a diffuser screen (20) and a rear wall (24). The light sources, selected according to the desired brightness level, are mosaics (24, 28) of light-emitting diodes (26, 30) that are placed immediately behind the diffuser screen with, for the highest brightness level, a first mosaic (24) of light-emitting diodes that provides daytime illumination and with, for the lowest brightness level, a second mosaic (28) of light sources that supplies night-time illumination.

Abstract: The present invention relates to a backlighting device, having several brightness levels, for a transmission display screen (12). The device comprises light sources placed in a case (14) between a translucent front wall formed by a diffuser screen (20) and a rear wall (24). The light sources, selected according to the desired brightness level, are mosaics (24, 28) of light-emitting diodes (26, 30) that are placed immediately behind the diffuser screen with, for the highest brightness level, a first mosaic (24) of light-emitting diodes that provides daytime illumination and with, for the lowest brightness level, a second mosaic (28) of light sources that supplies night-time illumination.

Abstract: The invention relates to the making safe of a device for inputting data to an item of equipment. The invention is of particular use in the aeronautical field, for example in order to validate data relating to flight conditions.