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303results about "Unbalanced current interference reduction" patented technology
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Multichannel interfacing device having a termination circuit
InactiveUS8222919B2Reduce reflectionReduce inductanceMultiple-port networksReliability increasing modificationsDiagonal matrixInterconnection
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 and a common terminal. A receiving circuit delivers, when the receiving circuit is in the activated state, “output signals of the receiving circuit” determined each by a linear combination of the voltages 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 (m+1)-terminal network such that, for small signals, the impedance matrix, with respect to the common terminal, of the (m+1)-terminal network is equal to a wanted non-diagonal matrix of size m×m.
Owner:ZXNOISE LLC
Line state detecting apparatus and transmitting apparatus and receiving apparatus of balanced transmission system
InactiveUS20050232412A1Promote balance between supply and demandSystems using filtering and bypassingSubstations coupling interface circuitsElectrical conductorSecondary side
A line state detecting apparatus provided in a balanced transmission system includes, in transmission lines comprising a pair of conductors W1, W2 connected to a transmitting portion 13, current transformers T11, T12 primary sides of which are inserted to respectives thereof in series therewith and secondary sides of which are connected in series to cancel currents or voltages of the two transformer by each other, and a detecting portion 11 for detecting currents or voltages on secondary sides of the current transformers T11, T12. By an output of the detecting portion 11, a difference of currents or voltages of the conductors W1, W2 of the transmission lines is provided and an unbalance component between the conductors W1, W2 is detected.
Owner:PANASONIC CORP
RF isolator for isolating voltage sensing and gate drivers
ActiveUS7460604B2Semiconductor/solid-state device detailsUnbalanced current interference reductionDriver circuitDriver/operator
A circuit package for providing isolation between a controller on a first side of a switched power supply and a second side of the switched power supply. An isolation link provides voltage isolation between the first and second sides and includes on the first sides circuitry for transmitting a driver signal received from the controller and circuitry for receiving a voltage feedback signal responsive to a sensed output voltage on the second side. The second side includes circuitry for receiving the driver signal and also circuitry for transmitting the voltage feedback signal. A driver located on the second side is responsive to the received driver signal. The second side further includes circuitry for sensing the output voltage and generating the voltage feedback signal. The isolation link additionally provides voltage isolation between the controller and the driver circuit and between the controller and the sensed output voltage.
Owner:SKYWORKS SOLUTIONS INC
Signal distribution within customer premises
InactiveUS7068682B2Unbalanced current interference reductionFrequency-division multiplexTelecommunications networkNetwork interface device
Data signals from a telecommunication network are routed to a gateway which generates analog signal distributed to receivers within a customer premises. A network interface device receives digital signals from the telecommunication network. A first diplexer has a digital signal port connected to the network interface device. The first diplexer combined signal port is connected with the combined signal port of a second diplexer. The gateway receives digital signals from the second diplexer digital signal port and provides analog signals to the second diplexer analog signal port. Analog signals are then available to receivers at both the first diplexer analog signal port and the second diplexer analog signal port.
Owner:QWEST
Suppression of radio frequency interference and impulse noise in communications channels
InactiveUS6546057B1Error preventionUnbalanced current interference reductionDifferential signalingEngineering
A noise suppression circuit for a communications channel (10) comprises a hybrid device (11) coupled to the channel for providing a differential output signal corresponding to a received signal. A delay unit (12) delays the differential signal by a suitable amount to allow for the generation and subtraction of a noise estimate. A summing device (13) extracts a digital common mode signal from the channel, and a noise estimation unit (16) provides a common mode noise estimate signal in dependence upon a history of the common mode signal over a predetermined period of time and over a plurality of frequency bands. The common mode noise estimate signal is combined subtractively (19) with the delayed differential signal to cancel common mode noise elements of the delayed differential signal. The noise estimation unit may comprise an analysis filter bank (20) for producing a plurality of subband signals (S1-SM), each at a different one of a plurality of different frequencies, a plurality of noise detection circuits (231-23M), each for processing a respective one of the plurality of subband signals to provide a component of the common mode noise estimate signal, and a synthesis filter bank (24) for processing the common mode noise signal components to provide the noise estimate signal.
Owner:BELL CANADA
Method and system for selectively operating in a half-duplex mode or full-duplex mode in a packet-based real-time media conference
InactiveUS7636327B1Simplify the management processExchange is limitedMultiplex system selection arrangementsSpecial service provision for substationReal-time computing
A method and system for managing communications in a packet-based real-time media conference. A conference server determines whether a given conference session should operate in half-duplex mode or in full-duplex mode, and the server instructs at least one participating station accordingly. In the half-duplex mode of operation, for instance, a station may engage in an implicit floor control process, in which the station treats an incoming media stream as an implicit floor denial. On the other hand, in the full-duplex mode of operation, a station would not treat an incoming stream as an implicit floor denial.
Owner:SPRING SPECTRUM LP
System and method of allocating bandwidth to a plurality of devices interconnected by a plurality of point-to-point communication links
InactiveUS6751684B2Error preventionFrequency-division multiplex detailsTelecommunications linkCommunication link
Owner:SAMSUNG ELECTRONICS CO LTD
Emergency Communications System
ActiveUS20090041206A1Increase speedEmergency connection handlingUnbalanced current interference reductionCommunication endpointCommunications system
A communication system and method is provided for handling emergency situations wherein complex public safety radio systems can be used to directly communicate with normally incompatible radio systems used by organizations such as schools, hospital, and other facilities. The system includes a radio communication bridge that is selectively activated by emergency personnel to contact selected organizations. The bridge is activated via a TCP / IP command sent from an organization having activation privileges to the selected communication endpoints. Computer software or firmware installed at various communication endpoints, emergency responder locations, and at an emergency call center is used to facilitate functionality of the system to include emergency notifications, dissemination of information associated with a particular emergency, and the status of the system to include activation and deactivation of the radio bridge.
Owner:SAFECOM 911
Filter Circuit, Differential Transmission System Having Same, and Power Supply
InactiveUS20070252659A1Quality improvementEnhanced inhibitory effectMultiple-port networksUnbalanced current interference reductionTransfer systemNormal mode
In a filter circuit (1), a common mode choke (2) and a normal mode choke (3) have extremely high and low impedances, respectively, for common mode signals received through two input terminals (1a and 1b). The chokes have the opposite impedance characteristics for differential signals. In particular, the difference in impedance is large. Furthermore, the normal mode choke (3) is installed as a previous stage of the common mode choke (2). Accordingly, common mode noises which enter the two input terminals (1a and 1b) penetrate the normal mode choke (3), but neither penetrate the common mode choke (2) nor are reflected from the common mode choke (2). In particular, common mode currents flow through the normal mode choke (3) but do not flow through the common mode choke (2).
Owner:PANASONIC CORP
RF isolator for isolating voltage sensing and gate drivers
ActiveUS20050271149A1Semiconductor/solid-state device detailsUnbalanced current interference reductionDriver circuitEngineering
A circuit package for providing isolation between a controller on a first side of a switched power supply and a second side of the switched power supply. An isolation link provides voltage isolation between the first and second sides and includes on the first sides circuitry for transmitting a driver signal received from the controller and circuitry for receiving a voltage feedback signal responsive to a sensed output voltage on the second side. The second side includes circuitry for receiving the driver signal and also circuitry for transmitting the voltage feedback signal. A driver located on the second side is responsive to the received driver signal. The second side further includes circuitry for sensing the output voltage and generating the voltage feedback signal. The isolation link additionally provides voltage isolation between the controller and the driver circuit and between the controller and the sensed output voltage.
Owner:SKYWORKS SOLUTIONS INC
Signal processing system, filter device and signal processing method
ActiveUS20090245335A1Reduce Signal ErrorFast convergenceUnbalanced current interference reductionCross-talk reductionHandling systemCrosstalk
A multi-channel signal processing system includes a filter unit arranged at a signal transmitting end and a feedback unit arranged at a signal receiving end. The filter unit includes a signal synthesis unit and a filter, where the filter is adapted to filter crosstalk source signals of signals to be transmitted and perform subsequent filtering in accordance with received feedback information; the signal synthesis unit is adapted to receive the signals to be transmitted which are input and the crosstalk source signals filtered by the filter, and synthesize the signals to be transmitted and the crosstalk source signals; and the feedback unit is adapted to make a feedback to the filter in accordance with the received signals to be transmitted.
Owner:HUAWEI TECH CO LTD
Pseudo-differential receiving circuit
InactiveUS20110074488A1Unbalanced current interference reductionElectronic switchingInterconnectionEngineering
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 by an output of a combining circuit having 4 inputs and 4 outputs. Each signal terminal of the receiving circuit is connected to a first input terminal of a differential circuit, the differential circuit also having a second input terminal and a single output terminal. The common terminal of the receiving circuit is connected to the second input terminal of each of the differential circuits. Each input of the combining circuit is coupled to the output terminal of one of the differential circuits. Each of the output signals of the receiving circuit is a linear combination of the voltages between one of the signal terminals and the common terminal.
Owner:ZXNOISE LLC
Compensating for wander in ac coupling data interface
ActiveUS20120133414A1Reduce wanderingMultiple-port networksDelay line applicationsData interfaceIntegrated circuit
Techniques are disclosed relating to reducing wander created by AC couplers. In one embodiment, an integrated circuit is disclosed that includes an AC coupler and a DC-level shifter. The AC coupler is configured to receive a differential input signal at first and second nodes, and to shift a common-mode voltage of the differential input signal. The DC-level shifter is coupled to the first and second nodes, and configured to reduce wander of the AC coupler. In various embodiments, the DC-level shifter is configured to supply a differential reference signal to the AC coupler, and to create the differential reference signal from the differential input signal at the first and second nodes by changing a common-mode voltage of the differential input signal.
Owner:ADVANCED MICRO DEVICES INC
Radio frequency local area network
InactiveUS6990090B2Efficient and dynamic handling of dataIncrease rangeDigital data processing detailsAntenna supports/mountingsCommunications systemComputer terminal
An apparatus and a method for routing data in a radio data communication system having one or more host computers, one or more intermediate base stations, and one or more RF terminals organizes the intermediate base stations into an optimal spanning-tree network to control the routing of data to and from the RF terminals and the host computer efficiently and dynamically. Communication between the host computer and the RF terminals is achieved by using the network of intermediate base stations to transmit the data.
Owner:AVAGO TECH INT SALES PTE LTD
Space-time coded OFDM system for MMDS applications
InactiveUS7342875B2Special service provision for substationFrequency-division multiplex detailsTransceiverCommunications system
A communications system includes a base station that is configured to transmit a signal that is modulated according to a predetermined modulation scheme and an orthogonal frequency division multiplexing scheme, wherein the signal is encoded using space-frequency coding. The base station includes a plurality of multiple-input multiple-output (MIMO) transceivers. The system includes a terminal that is configured to receive the modulated signal. The above arrangement is particularly applicable to providing multichannel multipoint distribution services (MMDS) over a radio communications system.
Owner:THE DIRECTV GRP INC
Network conference system, conference server, record server, and conference terminal
InactiveUS7426192B2Improve usabilityMultiplex system selection arrangementsSpecial service provision for substationTelecommunicationsComputer terminal
In addition to a conference server 100, a record server 200 is provided. The conference data of a real-time conference is stored in a storage section 214 of the record server 200 (S2). A conference terminal 300a performs connection processing to the conference (S1) and then transmits a catch-up playback request to the record server 200 (S3). The record server 200 determines whether or not catch-up playback is enabled (S4) and then distributes the past conference data (S6), and notifies the conference terminal 300a that the catch-up playback end point has come (S7-1). Accordingly, the connection of the conference terminal 300a is switched to the conference server 100 (S9) and the conference terminal 300a is connected to the real-time conference (S10).
Owner:PIONEER CORP
Magnetic package for a communication system
ActiveUS8284007B1Multiple-port networksTwo-way loud-speaking telephone systemsCommunications systemTransceiver
A magnetic package for a communication system is disclosed the package comprises a plurality of transformers, wherein each transformer comprises a differential transformer. Each differential transformer comprises at least 2 sets of three pins. Each transformer is coupled to a twisted pair channel and a transceiver. The magnetic package includes at least one common mode transformer coupled to at least one of the transformers, wherein the at least one common mode transformer includes at least three pins. The at least three pins for the at least one common mode transformer are in a position relative to the other pins such that the package size is minimized.
Owner:MARVELL ASIA PTE LTD
Layer 2 virtual private network over PBB-TE/PBT and seamless interworking with VPLS
ActiveUS20080247406A1Unbalanced current interference reductionData switching by path configurationPrivate networkProvider Backbone Bridge Traffic Engineering
A Layer 2 Virtual Private Network (L2VPN) system is provided. A Provider Backbone Bridge (PBB) network is provided which comprises a plurality of sites to be connected via a L2VPN. The plurality of sites in the PBB network is connected using a plurality of provider backbone trunks that includes a Provider Backbone Transport (PBT) trunk or a Provider Backbone Bridge Traffic Engineering (PBB-TE) trunk, such that the L2VPN includes the plurality of sites.
Owner:K MIZRA LLC
Balanced transmitting apparatus
InactiveUS20050238107A1Unbalanced stateMultiple-port networksSystems using filtering and bypassingSignal sourceVoltage
A balanced transmission signal Tx (t) (voltage e, −e) is applied to a transmission line (L1, L2), a suppression signal (ec) is generated from a common mode suppression signal source (ec), and the suppression signal (ec) is superposed on respectives of balanced transmission signals via adders (15a, 15b). By pertinently controlling a level of the suppression signal (ec), voltage levels and phases of respectives of the transmission signals transmitted to the transmission lines (L1, L2) are controlled.
Owner:PANASONIC CORP
Discovery and Capability Exchange Management in a Virtualized Computing Platform Utilizing a SR-IOV Adapter
In various embodiments a traffic class manager is a resource within a virtualized computer systems trusted entity (i.e. a hypervisor, trusted partition, etc.) which maps requirements from a platform management and associated network capabilities onto an SR-IOV adapter in order to appropriately allocate SR-IOV adapter and network resources to the virtualized computer partitions. In various embodiments the traffic class manager defines network traffic classes that meet the objectives of a platform administrator based on the capabilities of the SR-IOV adapter and the network attached to the adapter ports. Once the traffic classes are defined, in various embodiments, the traffic class manager enforces the assignment of a traffic class to a virtual interface queue pair within a partition.
Owner:IBM CORP
System and method for canceling impulse noise
ActiveUS7593494B1Polarisation/directional diversityUnbalanced current interference reductionSelf adaptivePulse noise
A system for canceling impulse noise comprises an adaptive impulse canceler and a combiner. The adaptive impulse canceler is configured to receive a common mode component of a received signal and to detect a noise impulse in the common mode component. The impulse canceler is further configured to provide, based on the noise impulse in the common mode component, an impulse noise estimation for a differential mode component of the received signal. The combiner is configured to receive the differential mode component and the impulse noise estimation and to subtract the impulse noise estimation from the differential mode component.
Owner:ADTRAN
Minimizing saturation caused by power transfer in a communication system transformer
ActiveUS20070280471A1Increase currentIncreases the magnetic flux imbalanceInterconnection arrangementsUnbalanced current interference reductionCommunications systemTransformer
A method and apparatus that minimizes saturation caused by power transfer in a communication system transformer, such as a transformer found in a Power-over-Ethernet system. A magnetic flux imbalance causing saturation in the transformer is detected. A compensation current is injected into a winding to minimize the magnetic flux imbalance and saturation.
Owner:AVAGO TECH INT SALES PTE LTD
Full duplex network radio bridge with low latency and high throughput
InactiveUS7751350B1Frequency-division multiplex detailsUnbalanced current interference reductionTransceiverInner loop
A full duplex radio bridge using two transceivers coupled to a first packet network, one for transmitting data toward another radio bridge coupled to a second packet network, and the other for receiving data transmitted from the first packet network toward said second packet network by a transceiver of the other radio bridge. Each radio bridge is coupled to its packet network through one network port whose transmit data path is coupled to one of the transceivers, and whose receive data path is coupled to receive data from the other transceiver. An inner loop and outer loop is used. Management packets are routed to the various transceivers using the inner loop and outer loop by routing and filtering functions. Payload packets are transmitted from one packet network to the other using only the outer loop.
Owner:PABST WILLIAM GEORGE
Cable assembly having a signal-control component
ActiveUS9608590B2Multiple-port networksUnbalanced current interference reductionElectricityInsulation layer
Cable assembly includes a communication cable having first and second insulated wires. Each of the first and second insulated wires has a signal conductor and an insulation layer that surrounds the signal conductor. The cable assembly also includes a circuit carrier that is coupled to the communication cable and has first and second signal pathways. Each of the first and second signal pathways includes a leading conductive surface and a trailing conductive surface that are separated from each other. The signal conductors of the first and second insulated wires are coupled to the trailing conductive surfaces of the first and second signal pathways, respectively. Each of the first and second signal pathways includes a corresponding signal-control component that electrically couples the separated leading and trailing conductive surfaces.
Owner:TYCO ELECTRONICS LOGISTICS AG (CH)
Clock supplying apparatus
InactiveUS20080150606A1Improve reducibilitySimple configurationMultiple-port networksReliability increasing modificationsInductorParallel resonance
Disclosed herein is a clock supplying apparatus for supplying a clock to a digital circuit, including: a differential clock driver; a first clock line along which a first clock of a positive phase from the clock driver propagates; a second clock line along which a second clock of a reverse phase from the clock driver propagates; and a parallel resonance circuit of an inductor and a capacitor. The inductor of the parallel resonance circuit is connected at a first end to the first clock line and at a second end to the second clock line. The capacitor of the parallel resonance circuit is connected at a first electrode to the first clock line and at a second electrode to the second clock line.
Owner:SONY CORP
Intelligent fast switch-over network tap system and methods
ActiveUS20100177644A1Effective maintenanceAvoiding wider networkError preventionTransmission systemsCross connectionActive monitoring
An intelligent fast switch-over network active tap system enables active monitoring of a network segment connected between network devices. A fail-safe relay subsystem is coupled between a pair of network ports, enabling transmission of network communications signals through a passive cross-connect between the network ports or through an active bridge subsystem. The active bridge subsystem is capable of independently establishing network links with the network devices, and a separate network link with a monitoring device. A controller manages operation of the relay and active bridge subsystems, including switches between passive and active network transmission through the tap system and to determine and establish the active network links subject to symmetric network link parameters and state. Thereby, the network link status of the connected network devices is preserved on switch between active and passive transmission and correctly reflected in the presence of link and power failures.
Owner:NETSCOUT SYSTEMS
Boot loader for active cable assemblies
InactiveUS10235184B2Current interference reductionUnbalanced current interference reductionData signalControl theory
According to one embodiment, an active cable assembly may include a cable end, a data receiver, a controller characteristic circuit, and a controller. The data receiver, operable to receive a DC-balanced data signal, can be electrically coupled to a conductive input data line of the cable end. The controller characteristic circuit can be electrically coupled to the conductive input data line. The controller can be communicatively coupled to the data receiver. The controller may include a configurable communication port electrically coupled to the controller characteristic circuit, and memory for storing a boot loader. The controller can execute the boot loader to set the configurable communication port as an output for controller data signals and as an input for the controller data signals.
Owner:CORNING OPTICAL COMM LLC
Cable assembly having a signal-control component
ActiveUS20160142030A1Multiple-port networksUnbalanced current interference reductionInsulation layerElectrical conductor
Cable assembly is provided that includes a communication cable having first and second insulated wires. Each of the first and second insulated wires has a signal conductor and an insulation layer that surrounds the signal conductor. The cable assembly also includes a circuit carrier that is coupled to the communication cable and has first and second signal pathways. Each of the first and second signal pathways includes a leading conductive surface and a trailing conductive surface that are separated from each other. The signal conductors of the first and second insulated wires are coupled to the trailing conductive surfaces of the first and second signal pathways, respectively. Each of the first and second signal pathways includes a corresponding signal-control component that electrically couples the separated leading and trailing conductive surfaces.
Owner:TYCO ELECTRONICS LOGISTICS AG (CH)
Capacitive isolation receiver circuitry
ActiveUS8502584B1Unbalanced current interference reductionFixed station two-conductor transmission systemsCapacitanceSchmitt trigger
One aspect of the present invention is directed to a circuit that includes an amplifier circuit disposed between an isolation link and a Schmitt trigger circuit to amplify a differential signal communicated over the isolation link and supply the amplified signal to the Schmitt trigger circuit. In turn, the Schmitt trigger circuit is coupled to the amplifier circuit to receive the differential signal and to supply a differential output signal corresponding to the differential signal communicated over the isolation link.
Owner:SKYWORKS SOLUTIONS INC
Termination circuit, vehicle-mounted control apparatus, and vehicle-mounted communication system
InactiveUS20080204172A1Increase transfer speedImprove waveformElectric signal transmission systemsElectric devicesElectrical resistance and conductanceCommunications system
The termination circuit for use in a transmission line to transmit a differential signal includes a first series circuit of a resistive element and an inductive element connected between one of two signal wires of the transmission line and a reference potential, and a second series circuit of a resistive element and an inductive element connected between the other of the signal wires and the reference potential. The inductive elements of the first and second series circuits are magnetically coupled such that they generate magnetic fields having such directions as to reinforce each other when a common-mode signal flows along the transmission line, and generate magnetic fields having such directions as to weaken each other when a differential-mode signal flows along the transmission line.
Owner:DENSO CORP
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