Abstract

A thermonuclear reactor of the invention comprises an ion cyclotron resonance heating system, the ion cyclotron resonance heating system comprising: a tunable antenna (1) having 4 signal ports, the tunable antenna allowing a transfer of power from its signal ports to an electromagnetic field produced in a vacuum chamber (2); a multiple-input-port and multiple-output-port tuning unit (4) having 4 input ports and 4 output ports, each of the output ports being indirectly coupled to one and only one of the signal ports through a coaxial transmission line (3); 4 high-power radio-frequency amplifiers (6), the output of each of which being indirectly coupled to one and only one of the 4 input ports through a coaxial transmission line (5); and a signal generation and control unit (7).

IPC Classes  ?

• H03H 7/40 - Automatic matching of load impedance to source impedance
• G21B 1/11 - Thermonuclear fusion reactors Details
• H04B 1/04 - Circuits

Abstract

A thermonuclear reactor of the invention comprises an ion cyclotron resonance heating system, the ion cyclotron resonance heating system comprising: an antenna (1), the antenna having 4 signal ports, the antenna allowing a transfer of power from its 4 signal ports to an electromagnetic field produced by the antenna in a vacuum chamber (2) of the thermonuclear reactor; a multiple-input-port and multiple-output-port tuning unit (4) having 4 input ports and 4 output ports, each of the output ports being indirectly coupled to one and only one of the signal ports through a coaxial transmission line (3); 4 high-power radio-frequency amplifiers (6), the output of each of which being indirectly coupled to one and only one of the 4 input ports through a coaxial transmission line (5); and a signal generation and control unit (7).

IPC Classes  ?

• H03H 7/40 - Automatic matching of load impedance to source impedance
• H04B 1/04 - Circuits
• G21B 1/11 - Thermonuclear fusion reactors Details

Abstract

The invention relates to a method and a device for pseudo-differential transmission through interconnections used for sending a plurality of electrical signals. An interconnection (1) having 4 transmission conductors and a return conductor (10) distinct from the reference conductor cannot be modeled as a uniform multiconductor transmission line. Each end of the interconnection (1) is connected to a termination circuit (4). Three damping circuits (8) are connected between the return conductor (10) and the reference conductor. The transmitting circuits (5) receive at their inputs the signals from the 4 channels of the two sources (2), and are connected to the interconnection (1). The receiving circuits (6) are connected to the interconnection (1), each receiving circuit (6) being such that the signals of the 4 channels of a source (2) connected to a transmitting circuit (5) in the activated state are sent to the four channels of the destinations (3), without noticeable echo, internal crosstalk and external crosstalk.

IPC Classes  ?

• H04B 3/32 - Reducing cross-talk, e.g. by compensating
• H04B 3/46 - MonitoringTesting

Abstract

The invention relates to a method and a device for transmission through interconnections used for sending a plurality of electrical signals. An interconnection (1) having 4 transmission conductors and a reference conductor cannot be modeled as a uniform multiconductor transmission line. Each end of the interconnection (1) is connected to a termination circuit (4). The transmitting circuits (5) receive at their inputs the signals from the 4 channels of the two sources (2), and are connected to the interconnection (1). A transmitting circuit (5) in the activated state produces modal electrical variables, each modal electrical variable being allocated to one and only one channel. The receiving circuits (6) are connected to the interconnection (1), each receiving circuit (6) being such that the signals of the 4 channels of a source (2) connected to a transmitting circuit (5) in the activated state are sent to the four channels of the destinations (3), without noticeable echo and internal crosstalk.

IPC Classes  ?

• H04B 3/32 - Reducing cross-talk, e.g. by compensating
• H04B 3/46 - MonitoringTesting

Abstract

The invention relates to a device for pseudo-differential transmission through interconnections used for sending a plurality of electrical signals. An interconnection (1) comprises 4 transmission conductors (11) (12) (13) (14) and 5 elementary return conductors (101) (102) (103) (104) (105) which are distinct from the reference conductor (7). One end of the interconnection (1) is connected to a termination circuit (4). A transmitting circuit (5) receives at its input the signals from the 4 channels of a source (2), and is connected to the conductors of the interconnection (1). Each output signal of a receiving circuit (6) is mainly determined by one or more of the voltages between one of its signal terminals connected to the transmission conductors (11) (12) (13) (14) and its common terminal connected to the elementary return conductors (101) (102) (103) (104) (105). The signals of the 4 channels of the source (2) are sent to the four channels of the destinations (3) without noticeable external crosstalk.

IPC Classes  ?

• H04B 3/02 - Line transmission systems Details
• H04L 25/08 - Modifications for reducing interferenceModifications for reducing effects due to line faults
• H04L 25/02 - Baseband systems Details

Abstract

The invention relates to an interfacing device for transmission through interconnections used for sending a plurality of electrical signals. The interfacing device of the invention comprises signal terminals (101) and a common terminal ( 100). A transmitting circuit (5) receives the "input signals of the transmitting circuit" coming from a source (2). The output of the transmitting circuit (5) delivers, when the transmitting circuit (5) is in the activated state, voltages between one of said signal terminals (101) and the reference terminal (ground). A receiving circuit (6) delivers, when the receiving circuit is in the activated state, "output signals of the receiving circuit" determined each by the voltage between one of said signal terminals (101) and said common terminal (100), to the destination (3). In the closed state, the common terminal switching circuit (9) is, for the common terminal (100), equivalent to a voltage source delivering a constant voltage, connected in series with a passive two-terminal circuit element presenting a low impedance.

IPC Classes  ?

• H04B 3/18 - Control of transmissionEqualising characterised by the negative-impedance network used wherein the network comprises semiconductor devices
• H05K 1/02 - Printed circuits Details
• H03K 19/0185 - Coupling arrangementsInterface arrangements using field-effect transistors only
• H04L 25/02 - Baseband systems Details
• H04L 25/08 - Modifications for reducing interferenceModifications for reducing effects due to line faults

Abstract

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 (1) having 4 transmission conductors and a return conductor (10) distinct from the reference conductor (7) are each connected to a termination circuit (4). Three damping circuits (8) are connected between the return conductor (10) and the reference conductor (7). The transmitting circuits (5) receive at their inputs the signals from the 4 channels of the two sources (2), and are connected to the conductors of the interconnection (1). A transmitting circuit (5) in the activated state produces modal electrical variables, each modal electrical variable being allocated to one and only one channel. The receiving circuits (6) are connected to the conductors of the interconnection (1), each receiving circuit (6) being such that the 4 channels of a source (2) connected to a transmitting circuit (5) in the activated state are sent to the four channels of the destinations (3), without noticeable echo, internal crosstalk and external crosstalk.

IPC Classes  ?

• H04B 3/32 - Reducing cross-talk, e.g. by compensating
• H04L 25/02 - Baseband systems Details

Abstract

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 (1) having 4 transmission conductors and a return conductor (10) distinct from the reference conductor (7) are each connected to a termination circuit (4). Three damping circuits (8) are connected between the return conductor (10) and the reference conductor (7). The transmitting circuits (5) receive at their inputs the signals from the 4 channels of the two sources (2), and are connected to the conductors of the interconnection (1). A transmitting circuit (5) in the activated state produces natural electrical variables, each natural electrical variable being allocated to one and only one channel. The receiving circuits (6) are connected to the conductors of the interconnection (1), each receiving circuit (6) being such that the 4 channels of a source (2) connected to a transmitting circuit (5) in the activated state are sent to the four channels of the destinations (3) without noticeable echo, internal crosstalk and external crosstalk.

IPC Classes  ?

• H04B 3/32 - Reducing cross-talk, e.g. by compensating
• H04L 25/02 - Baseband systems Details

Abstract

The invention relates to a receiving circuit for transmission through interconnections used for sending a plurality of electrical signals. Each of the 'output signals of the receiving circuit' produced by the receiving circuit of the invention is delivered to an output (68) which is an output of a combining circuit (64) having 4 inputs and 4 outputs. Each signal terminal (101) is connected to a first input terminal of a differential circuit (61), said differential circuit also having a second input terminal and a single output terminal. The common terminal (100) is connected to the second input terminal of each of said differential circuits (61). Each input of said combining circuit (64) is coupled to the output terminal of one of said differential circuits (61). Each of said 'output signals of the receiving circuit' is a linear combination of the voltages between one of said signal terminals (101) and said common terminal (100).

IPC Classes  ?

• H04B 3/32 - Reducing cross-talk, e.g. by compensating
• H04L 25/02 - Baseband systems Details

Abstract

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.A multiple-input and multiple-output amplifier of the invention comprises a common input terminal (10), 4 signal input terminals (11) (12) (13) (14), 4 signal output terminals (21) (22) (23) (24), a common terminal amplifier (9), 4 active sub-circuits (30) and a feedback network (40). Each active sub-circuit (30) has a sub-circuit input terminal connected to one of the signal input terminals (11) (12) (13) (14), a sub-circuit output terminal connected to one of the signal output terminals (21) (22) (23) (24) and a sub-circuit common terminal. The feedback network (40) has 4 "C" terminals and one "R" terminal. Each of said "C" terminals of the feedback network (40) is coupled to the sub-circuit common terminal of one of said active sub-circuits (30). The output terminal of the common terminal amplifier (9) is coupled to said "R" terminal of the feedback network (40).

IPC Classes  ?

• H03F 3/45 - Differential amplifiers
• H03F 3/68 - Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
• H04B 3/32 - Reducing cross-talk, e.g. by compensating

Abstract

The invention relates to an interfacing device for transmission through interconnections used for sending a plurality of electrical signals. The interfacing device of the invention comprises signal terminals (101) and a common terminal (100). A receiving circuit (6) delivers, when the receiving circuit (6) is in the activated state, "output signals of the receiving circuit" determined each by a linear combination of the voltages between one of said signal terminals (101) and said common terminal (100), to the destination (3). A termination circuit (4) is such that, when it is in the activated state, it is approximately equivalent, for said signal terminals (101) and said common terminal (100), to a (m + l)-terminal network such that, for small signals, the impedance matrix, with respect to said common terminal, of said (m + l)-terminal network is equal to a wanted non-diagonal matrix of size m x m.

IPC Classes  ?

• H04L 25/02 - Baseband systems Details
• H04B 3/32 - Reducing cross-talk, e.g. by compensating

Abstract

The invention relates to an interfacing device for transmission through interconnections used for sending a plurality of electrical signals. The interfacing device of the invention comprises signal terminals (101) and a common terminal (100). A transmitting circuit (5) receives the "input signals of the transmitting circuit" coming from a source (2) and delivers, when the transmitting circuit (5) is in the activated state, currents to the signal terminals (101), each of said currents being mainly determined by one or more of said "input signals of the transmitting circuit", one or more of said currents being not mainly determined by only one of said "input signals of the transmitting circuit". The balancing circuit (9) is such that, when the transmitting circuit is in the activated state, the current flowing out of the common terminal (100) approximates the opposite of the sum of the currents flowing out of the signal terminals (101).

IPC Classes  ?

• H04B 3/32 - Reducing cross-talk, e.g. by compensating
• H04L 25/02 - Baseband systems Details

Abstract

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 (1) having 4 transmission conductors and a return conductor (10) distinct from the reference conductor (7) are each connected to a termination circuit (4). Three damping circuits (8) are connected between the return conductor (10) and the reference conductor (7). The transmitting circuits (5) receive at their inputs the signals from the 4 channels of the two sources (2), and are connected to the conductors of the interconnection (1). The receiving circuits (6) are connected to the conductors of the interconnection (1), each receiving circuit (6) being such that the 4 channels of a source (2) connected to a transmitting circuit (5) in the activated state are sent to the four channels of the destinations (3) without noticeable external crosstalk.

IPC Classes  ?

• H04B 3/32 - Reducing cross-talk, e.g. by compensating
• H04L 25/08 - Modifications for reducing interferenceModifications for reducing effects due to line faults
• H04L 25/02 - Baseband systems Details

Abstract

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 comprises signal terminals (101) and a common terminal ( 100). A transmitting circuit (5) receives the 'input signals of the transmitting circuit' coming from a source (2). The output of the transmitting circuit (5) delivers, when the transmitting circuit is in the activated state, voltages between one of said signal terminals (101) and said common terminal (100). A receiving circuit (6) delivers, when the receiving circuit is in the activated state, 'output signals of the receiving circuit' determined each by the voltage between one of said signal terminals (101) and said common terminal (100), to the destination (3). The balancing circuit (9) is such that, when the transmitting circuit is in the activated state, the current flowing out of the common terminal (100) approximates the opposite of the sum of the currents flowing out of the signal terminals (101).

IPC Classes  ?

• H04L 25/02 - Baseband systems Details
• H04B 3/32 - Reducing cross-talk, e.g. by compensating
• H04B 3/30 - Reducing interference caused by unbalanced currents in a normally balanced line
• H04L 25/08 - Modifications for reducing interferenceModifications for reducing effects due to line faults

Abstract

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 comprises signal terminals (101) and a common terminal ( 100). A transmitting circuit (5) receives the 'input signals of the transmitting circuit' coming from a source (2). The output of the transmitting circuit (5) delivers, when the transmitting circuit is in the activated state, voltages between one of said signal terminals (101) and the reference terminal (ground). A receiving circuit (6) delivers, when the receiving circuit is in the activated state, 'output signals of the receiving circuit' determined each by the voltage between one of said signal terminals (101) and said common terminal (100), to the destination (3). In the closed state, the common terminal switching circuit (9) is, for the common terminal (100), equivalent to a voltage source delivering a constant voltage, connected in series with a passive two-terminal circuit element presenting a low impedance.

IPC Classes  ?

• H04L 25/08 - Modifications for reducing interferenceModifications for reducing effects due to line faults
• H04B 3/32 - Reducing cross-talk, e.g. by compensating

Abstract

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 comprises signal terminals (101) and a common terminal (100) distinct from the reference terminal (ground). A transmitting circuit (5) receiving the 'input signals of the transmitting circuit' coming from a source (2) delivers, when the transmitting circuit (5) is in the activated state, currents to the signal terminals (101). A receiving circuit (6) delivers, when the receiving circuit (6) is in the activated state, 'output signals of the receiving circuit' determined each by the voltage between one of said signal terminals (101) and said common terminal (100), to the destination (3). A termination circuit (4) is such that, when it is in the activated state, it is approximately equivalent, for said signal terminals (101) and said common terminal (100), to a network consisting of 4 branches, each branch being connected to the common terminal (100) and to one of said signal terminals (101).

IPC Classes  ?

• H03K 19/0185 - Coupling arrangementsInterface arrangements using field-effect transistors only
• H04L 25/02 - Baseband systems Details
• H04B 3/32 - Reducing cross-talk, e.g. by compensating
• H04L 25/08 - Modifications for reducing interferenceModifications for reducing effects due to line faults
• H04L 5/20 - Arrangements affording multiple use of the transmission path using different combinations of lines, e.g. phantom working
• H04B 3/46 - MonitoringTesting

Abstract

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 (100) are connected to the input ports of a device for transmission (150) which transmits the electrical signals stemming from the 3 antennas to the input terminals of a multiple-input-port and multiple-output-port amplifier (350) having 3 input ports and 3 output ports. Each output port of the multiple-input-port and multiple-output-port amplifier (350) is connected to the input of an analog processing and conversion circuit (400) which outputs digital signals. The output of each analog processing and conversion circuit (400) is connected to an input of a multiple-input signal processing device (550), whose output is connected to the destination (600).

IPC Classes  ?

• H04B 7/08 - Diversity systemsMulti-antenna systems, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station

Abstract

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 4 signal input terminals (11) (12) (13) (14), 4 signal output terminals (21) (22) (23) (24), 4 active sub-circuits (30) and a feedback network (40). Each active sub-circuit has a sub-circuit input terminals connected to one of the signal input terminals (11) (12) (13) (14), a sub-circuit output terminal connected to one of the signal output terminals (21) (22) (23) (24) and a sub-circuit common terminal. The feedback network (40) uses mutual induction between windings. The feedback network (40) has terminals connected to the sub-circuit common terminal of the active sub-circuits (30). The feedback network (40) 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.

IPC Classes  ?

• H03F 3/68 - Combinations of amplifiers, e.g. multi-channel amplifiers for stereophonics
• H03F 3/189 - High-frequency amplifiers, e.g. radio frequency amplifiers

Abstract

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 comprises 4 signal input terminals (11) (12) (13) (14), 4 signal output terminals (21) (22) (23) (24), 4 active sub-circuits (30) and a feedback network (40). Each active sub-circuit has a sub-circuit input terminal connected to one of the signal input terminals (11) (12) (13) (14), a sub-circuit output terminal connected to one of the signal output terminals (21) (22) (23) (24) and a sub-circuit common terminal. The feedback network (40) has terminals connected to the sub-circuit common terminal of each active sub-circuit (30). The feedback network (40) 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.

IPC Classes  ?

• H03F 3/21 - Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only