EXCEM SAS Patent applications |
Patent application number | Title | Published |
20100253446 | METHOD AND DEVICE FOR PSEUDO-DIFFERENTIAL TRANSMISSION - The invention relates to a method and a device for pseudo-differential transmission in interconnections used for sending a plurality of electrical signals. The ends of an interconnection having 4 transmission conductors and a return conductor distinct from the reference conductor are each connected to a termination circuit. Three damping circuits are connected between the return conductor and the reference conductor. The transmitting circuits receive at their inputs the signals from the 4 channels of the two sources, and are connected to the conductors of the interconnection. The receiving circuits are connected to the conductors of the interconnection, each receiving circuit being such that the 4 channels of a source connected to a transmitting circuit in the activated state are sent to the four channels of the destinations without noticeable external crosstalk. | 10-07-2010 |
20100248673 | Method and Device for Radio Reception Using a Plurality of Antennas - The invention relates to a method for radio reception using a plurality of antennas and to a receiver for radio transmission using a plurality of antennas. In a receiver for radio transmission with multiple antennas of the invention, 3 antennas are connected to the input ports of a device for transmission which transmits the electrical signals stemming from the 3 antennas to the input terminals of a multiple-input-port and multiple-output-port amplifier having 3 input ports and 3 output ports. Each output port of the multiple-input-port and multiple-output-port amplifier is connected to the input of an analog processing and conversion circuit which outputs digital signals. The output of each analog processing and conversion circuit is connected to an input of a multiple-input signal processing device, whose output is connected to the destination. | 09-30-2010 |
20100244948 | MULTIPLE-INPUT AND MULTIPLE-OUTPUT AMPLIFIER USING MUTUAL INDUCTION IN THE FEEDBACK NETWORK - The invention relates to an amplifier capable of producing a plurality of output signals, these output signals being controlled by a plurality of input signals. A multiple-input and multiple-output amplifier of the invention comprises includes 4 signal input terminals, 4 signal output terminals, 4 active sub-circuits and a feedback network. Each active sub-circuit has a sub-circuit input terminals connected to one of the signal input terminals, a sub-circuit output terminal connected to one of the signal output terminals and a sub-circuit common terminal. The feedback network uses mutual induction between windings. The feedback network has terminals connected to the sub-circuit common terminal of the active sub-circuits. The feedback network presents an impedance matrix producing a negative feedback such that the transfer admittance matrix of the multiple-input and multiple-output amplifier approximates a given admittance matrix. | 09-30-2010 |
20100213971 | PSEUDO-DIFFERENTIAL INTERFACING DEVICE HAVING A SWITCHING CIRCUIT - The invention relates to an interfacing device for pseudo-differential transmission through interconnections used for sending a plurality of electrical signals. The interfacing device of the invention includes signal terminals and a common terminal. A transmitting circuit receives the input signals of the transmitting circuit coming from a source. The output of the transmitting circuit delivers, when the transmitting circuit is in the activated state, voltages between one of the signal terminals and the reference terminal (ground). A receiving circuit delivers, when the receiving circuit is in the activated state, output signals of the receiving circuit determined each by the voltage between one of the signal terminals and the common terminal, to the destination. In the closed state, the common terminal switching circuit is, for the common terminal, equivalent to a voltage source delivering a constant voltage, connected in series with a passive two-terminal circuit element presenting a low impedance. | 08-26-2010 |
20100128814 | PSEUDO-DIFFERENTIAL INTERFACING DEVICE HAVING A BALANCING CIRCUIT - The invention relates to an interfacing device for pseudo-differential transmission through interconnections used for sending a plurality of electrical signals. The interfacing device of the invention includes signal terminals and a common terminal. A transmitting circuit receives the input signals of the transmitting circuit coming from a source. The output of the transmitting circuit delivers, when the transmitting circuit is in the activated state, voltages between one of said signal terminals and said common terminal. A receiving circuit delivers, when the receiving circuit is in the activated state, output signals of the receiving circuit determined each by the voltage between one of the signal terminals and the common terminal, to the destination. The balancing circuit is such that, when the transmitting circuit is in the activated state, the current flowing out of the common terminal approximates the opposite of the sum of the currents flowing out of the signal terminals. | 05-27-2010 |
20080272840 | Multiple-Input and Multiple-Output Amplifier - The invention relates to an amplifier capable of producing a plurality of currents at its output terminals, these currents being controlled by a plurality of input voltages. A multiple-input and multiple-output amplifier of the invention includes 4 signal input terminals, 4 signal output terminals, 4 active sub-circuits and a feedback network. Each active sub-circuit has a sub-circuit input terminal connected to one of the signal input terminals, a sub-circuit output terminal connected to one of the signal output terminals and a sub-circuit common terminal. The feedback network has terminals connected to the sub-circuit common terminal of each active sub-circuit. The feedback network presents, in a known frequency band, an impedance matrix producing a negative feedback such that the transfer admittance matrix of the multiple-input and multiple-output amplifier approximates a given admittance matrix. | 11-06-2008 |