Patent application number | Description | Published |
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 |
20090121743 | Digital Method and Device for Transmission with Reduced Crosstalk - The invention relates to a method and a device for transmission with reduced crosstalk in interconnections used for sending a plurality of signals, such as the interconnections made with flat multiconductor cables, or with the tracks of a printed circuit board, or inside an integrated circuit. An interconnection with four parallel transmission conductors plus a reference conductor has each of its ends connected to a termination circuit. The transmitting circuit receives at its input the signals of the four channels of the source and its output terminals are connected to the conductors of the interconnection. The receiving circuit(s) input terminals are connected to the conductors of the interconnection, and its four output channels are connected to the destination. The signals of the four channels of the source are sent to the four channels of the destination, without noticeable crosstalk. | 05-14-2009 |
20090310973 | Electroluminescent Emission Device for Optical Transmission in Free Space - The invention relates to a transmitting device for transmission through space, using electromagnetic waves of the infrared and/or visible and/or ultraviolet bands produced by one or several diodes producing electroluminescent light. | 12-17-2009 |
20100124295 | PSEUDO-DIFFERENTIAL INTERFACING DEVICE HAVING A TERMINATION 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 distinct from the reference terminal (ground). A transmitting circuit receiving the input signals of the transmitting circuit coming from a source delivers, when the transmitting circuit is in the activated state, currents to the signal terminals. 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. A termination circuit is such that, when it is in the activated state, it is approximately equivalent, for the signal terminals and the common terminal, to a network consisting of 4 branches, each branch being connected to the common terminal and to one of the signal terminals. | 05-20-2010 |
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 |
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 |
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 |
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 |
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 |
20110074488 | PSEUDO-DIFFERENTIAL RECEIVING CIRCUIT - The invention relates to a receiving circuit for transmission through interconnections used for sending a plurality of electrical signals. | 03-31-2011 |
20110074502 | MULTIPLE-INPUT AND MULTIPLE-OUTPUT AMPLIFIER HAVING PSEUDO-DIFFERENTIAL INPUTS - The invention relates to an amplifier capable of delivering a plurality of output signals, these output signals being controlled by a plurality of input signals. | 03-31-2011 |
20110084751 | MULTICHANNEL INTERFACING DEVICE HAVING A BALANCING CIRCUIT - The invention relates to an interfacing device for transmission through interconnections used for sending a plurality of electrical signals. | 04-14-2011 |
20110095838 | MULTICHANNEL INTERFACING DEVICE HAVING A TERMINATION CIRCUIT - The invention relates to an interfacing device for transmission through interconnections used for sending a plurality of electrical signals. | 04-28-2011 |
20110102100 | METHOD FOR PSEUDO-DIFFERENTIAL TRANSMISSION USING MODAL ELECTRICAL VARIABLES - The invention relates to a method and a device for pseudo-differential transmission in interconnections used for sending a plurality of electrical signals. | 05-05-2011 |
20130093518 | BALANCED-INPUT CURRENT-SENSING DIFFERENTIAL AMPLIFIER - The invention relates to a current-sensing differential amplifier having a balanced input. | 04-18-2013 |
20130211759 | METHOD FOR EVALUATING THE EFFECTS OF AN INTERCONNECTION ON ELECTRICAL VARIABLES - The invention relates to a method for evaluating the effects of a multiconductor interconnection on electrical variables in an electronic circuit or system, which takes into account the frequency dependent couplings between the conductors to obtain an accurate evaluation of effects such as propagation delay, attenuation, linear distortions, echo and crosstalk. | 08-15-2013 |
20130215980 | Receiver for Near-Field Chip-to-Chip Multichannel Transmission - The invention relates to a receiver for a near-field chip-to-chip multichannel transmission system such as the capacitive or inductive links used for vertical signal transmission between the stacked chips of a system-in-package. A receiver for near-field chip-to-chip multichannel transmission providing 4 transmission channels for digital transmission between two monolithic integrated circuits comprises 4 coupling devices ( | 08-22-2013 |
20140306784 | ANTENNA TUNING APPARATUS FOR A MULTIPORT ANTENNA ARRAY - An antenna tuning apparatus for a multiport antenna array used for sending and/or receiving electromagnetic waves for radio communication comprises: 4 antenna ports, 4 user ports, 10 adjustable impedance devices each presenting a negative reactance and having a terminal coupled to one of the antenna ports, 4 windings each having a first terminal coupled to one of the antenna ports and a second terminal coupled to one of the user ports, and 10 adjustable impedance devices each presenting a negative reactance and having a terminal coupled to one of the user ports. All adjustable impedance devices are adjustable by electrical means. Any small variation in the impedance matrix of the antenna array, caused by a change in operating frequency or a change in the medium surrounding the antennas, can be compensated with a new adjustment of the adjustable impedance devices. | 10-16-2014 |
20140315486 | Transmitter for Near-Field Chip-to-Chip Multichannel Transmission - This application relates to a transmitter for a near-field chip-to-chip multichannel transmission system such as the capacitive or inductive links used for vertical signal transmission between the stacked chips of a system-in-package. A transmitter for near-field chip-to-chip multichannel transmission providing 4 transmission channels for digital transmission between two monolithic integrated circuits comprises 4 coupling devices, each of said coupling devices being a planar winding sensitive to magnetic field variations. A multiple-input-port and multiple-output-port amplifier has 4 output ports, each of said output ports being connected to one and only one of said coupling devices. The transmitter also includes 4 signal shaping circuits, each of said signal shaping circuits having an input port connected to the source, each of said signal shaping circuits having an output port connected to one of the input ports of the multiple-input-port and multiple-output-port amplifier. | 10-23-2014 |
20140323075 | METHOD AND DEVICE FOR RADIO RECEPTION USING AN ANTENNA TUNING APPARATUS AND A PLURALITY OF ANTENNAS - A receiver for radio communication comprises: four antennas; an antenna tuning apparatus for simultaneously tuning the four antennas, the antenna tuning apparatus comprising adjustable impedance devices, each of the adjustable impedance devices having a reactance at a frequency, the reactance of any one of the adjustable impedance devices being adjustable by electrical means; four single-input and single-output low-noise amplifiers; four analog processing and conversion circuits; a multiple-input signal processing device delivering a signal to a destination, the multiple-input signal processing device delivering a tuning instruction; a tuning control unit, the tuning control unit receiving the tuning instruction from the multiple-input signal processing device, the tuning control unit delivering tuning control signals to the antenna tuning apparatus as a function of the tuning instruction. | 10-30-2014 |
20150063486 | METHOD AND DEVICE FOR RADIO RECEPTION USING A PLURALITY OF ANTENNAS AND A MULTIPLE-INPUT-PORT AND MULTIPLE-OUTPUT-PORT AMPLIFIER - The invention relates to a method for radio reception using a plurality of antennas and a multiple-input-port and multiple-output-port amplifier. The invention also relates to a receiver for radio communication using this method. The receiver for radio communication comprises: four antennas; a multiple-input-port and multiple-output-port amplifier comprising adjustable impedance devices, each of the adjustable impedance devices having a reactance at a frequency, the reactance of any one of the adjustable impedance devices being adjustable by electrical means; four analog processing and conversion circuits; a multiple-input signal processing device delivering a signal to a destination, the multiple-input signal processing device delivering a tuning instruction; and a tuning control unit, the tuning control unit receiving the tuning instruction from the multiple-input signal processing device, the tuning control unit delivering tuning control signals to the multiple-input-port and multiple-output-port amplifier as a function of the tuning instruction. | 03-05-2015 |
20150078485 | METHOD AND APPARATUS FOR AUTOMATICALLY TUNING AN IMPEDANCE MATRIX, AND RADIO TRANSMITTER USING THIS APPARATUS - The invention relates to a method and an apparatus for automatically tuning an impedance matrix, for instance the impedance matrix seen by the power amplifiers of a radio transmitter using a plurality of antennas simultaneously, and to a radio transmitter using this apparatus. An apparatus for automatically tuning an impedance matrix has 4 user ports and 4 target ports, and comprises: 4 sensing units; a signal processing unit, the signal processing unit estimating real quantities depending on the impedance matrix presented by the user ports, using the sensing unit output signals obtained for 4 different excitations applied successively to the user ports; a multiple-input-port and multiple-output-port tuning unit comprising adjustable impedance devices; and a tuning control unit delivering tuning control signals to the multiple-input-port and multiple-output-port tuning unit, the reactance of each of the adjustable impedance devices being mainly determined by one or more of the tuning control signals. | 03-19-2015 |