Transformer Coupling Patents (Class 375/258)
  • Patent number: 10396656
    Abstract: A control circuit for suppressing electromagnetic interference signal has an input and an output and a variable gain filter circuit with a first gain factor that is variable. The variable gain filter circuit receives a signal indicative of an electromagnetic interference signal and outputs a signal to a controlled signal source, which a second gain factor. The control circuit also has a controller operably connected to the variable gain filter circuit. The controller receives a signal indicative of an output signal at the output of the control circuit and outputs a control signal to the variable gain filter circuit. The control signal is based on the signal indicative of the output signal at the output of the control circuit, and the control signal controls the first gain factor and reduces the electromagnetic interference signal.
    Type: Grant
    Filed: November 9, 2018
    Date of Patent: August 27, 2019
    Assignee: AnApp Technologies Limited
    Inventors: Franki Ngai Kit Poon, Peter On Bon Chan
  • Patent number: 10355741
    Abstract: Apparatus and methods for performing wireless communications are provided. In some embodiments, an apparatus includes a transformer including a first winding, a second winding, and a third winding. The apparatus also includes a first transmitter circuit coupled with the first winding, and a second circuit coupled with the second winding. The third winding is coupled with an antenna. The first transmitter circuit is configured to transmit a first signal to the antenna via magnetic coupling between the first winding and the third winding. The second circuit is configured to tolerate without damage a second signal from the first transmitter circuit, wherein the second signal is generated from the first signal via magnetic coupling between the first winding and the second winding. A turn ratio between the first winding and the second winding can be configured to limit a voltage of the second signal to be within a pre-determined threshold.
    Type: Grant
    Filed: October 31, 2017
    Date of Patent: July 16, 2019
    Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
    Inventors: Rami Khatib, Janakan Sivasubramaniam, Theresa Starr, Jared Gagne
  • Patent number: 10333640
    Abstract: An apparatus and a method for range extension for a combined data and power line are provided. Further, a bus system is provided. The design is based on a supply voltage that is transmitted via the combined data and power line being refreshed by a charge pump. Further, there may be provision, by way of example, for a data signal that is transmitted via the combined data and power line to be refreshed using the likewise transmitted supply voltage.
    Type: Grant
    Filed: June 29, 2017
    Date of Patent: June 25, 2019
    Assignee: Beckhoff Automation GmbH
    Inventors: Christopher Pohl, Martin Rostan, Thomas Rettig, Johannes Kuenne
  • Patent number: 10079090
    Abstract: Multiple coil systems and methods are disclosed in which transmitter and receiver inductors, or coils, are coupled in a configuration for wirelessly transferring data and/or power among them. In preferred implementations, the systems and methods are used for transmitting data using pairs of coupled coils. One preferred aspect of the invention is that the coils are not permanently affixed in physical proximity to one another, but can be moved and/or interchanged.
    Type: Grant
    Filed: December 1, 2011
    Date of Patent: September 18, 2018
    Assignee: TRIUNE SYSTEMS, LLC
    Inventors: Ross Teggatz, Wayne Chen, Amer Atrash, Andrew Blaszczak, Jonathan Knight
  • Patent number: 9998704
    Abstract: A video communication method and system, and a terminal are presented. A sending terminal sends an invite message to a receiving terminal. The sending terminal receives a reply message. The sending terminal determines that a video encoding/decoding format supported by the sending terminal does not include a video encoding/decoding format included in the reply message. The sending terminal obtains a video encoding/decoding format supported by both the sending terminal and the receiving terminal. The sending terminal performs video communication with the receiving terminal by using the obtained video encoding/decoding format.
    Type: Grant
    Filed: December 28, 2015
    Date of Patent: June 12, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Yunhui Hu
  • Patent number: 9979418
    Abstract: A method includes digital/analog conversion of a digital signal modulated by information to provide a modulated initial analog signal having a crest factor greater than one, and amplification of the initial analog signal to provide an amplified modulated signal. A modulated channel analog signal derived from the modulated amplified analog signal is transmitted over a communications channel, with impedance of the communications channel varying during the transmission. The method further includes at least one determination during the transmission of a peak-clipping rate of the amplified analog signal over at least one time interval, and an adjustment of a level of the initial analog signal as a function of the determined peak-clipping rate.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: May 22, 2018
    Assignee: STMicroelectronics (Rousset) SAS
    Inventor: Mark Wallis
  • Patent number: 9948356
    Abstract: An electrical coupler includes: a sending transformer having a winding for receiving data signals and two windings connected in series with a common point and two terminals to be connected to a first wires pair of a bus to deliver the data signals at the first winding terminals to said wire pair; a receiving transformer having two windings connected in series with a common point and two terminals to be connected to a second pair of wires of said bus to receive data signals on the pair of wires and a winding for delivering said data signals; and a galvanic isolation transformer with a first winding, the terminals of which are connected to the coupler's power supply pins, and second and third windings connected in series with a common point connected to a mechanical ground and the respective free terminals connected to the common terminals of sending and receiving transformers.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: April 17, 2018
    Assignee: SAFRAN ELECTRONICS & DEFENSE SAS
    Inventor: François Guillot
  • Patent number: 9941944
    Abstract: Methods and apparatus are disclosed for applying successive multi-rank beamforming strategies (e.g., successive preceding strategies) for the design of precoders over a set of parallel channels. Successive beamforming is applied to a narrow band channel model and is also applied for finer quantization of a single beamforming vector (e.g., recursive beamforming). A first embodiment provides the optimal approach with high complexity. An alternative embodiment provides successive beamforming for near optimal precoding selection with medium complexity. A low complexity method for precoder selection is also provided wherein a channel representative matrix for the set of parallel channels is determined and successive beamforming on the calculated channel representative is applied.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: April 10, 2018
    Assignee: NEC Corporation
    Inventor: Mohammad Ali Khojastepour
  • Patent number: 9906211
    Abstract: A circuit for compensation of baseline voltage wander operating at an input of an isolator is disclosed. The circuit can compensate electronically the frequency response of an isolation circuit (e.g., a transformer) by increasing the pass band in the low frequency region in order to minimize the baseline wander caused by low inductance windings. The compensation circuit can be used to inject a current ramp proportional to the amplitude and the duration of the pulse and inversely proportional to the open circuit inductance of the isolation circuit.
    Type: Grant
    Filed: August 2, 2016
    Date of Patent: February 27, 2018
    Assignee: Analog Devices Global
    Inventor: Miguel Ángel Fernández Robayna
  • Patent number: 9829531
    Abstract: A system includes a first galvanic isolator, a second galvanic isolator, a sensor, and a monitoring module. The first galvanic isolator includes a first electrical insulator. The second galvanic isolator is connected in series with the first galvanic isolator and includes a second electrical insulator. The sensor generates a first output signal based on an electrical characteristic of one of the first and second electrical insulators. The monitoring module, based on the first output signal, selectively generates a signal indicative of a failure of at least one of the first and second electrical insulators.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: November 28, 2017
    Assignee: Maxim Integrated Products, Inc.
    Inventors: Roberto Alini, Larry Barnes, Baris Posat, Gene Svoboda
  • Patent number: 9800345
    Abstract: A network transceiver is disclosed. An example system includes a first networking transceiver including a first port and a second port, the first transceiver configured to: negotiate, for use with the first port, a first data rate, negotiate, for use with the second port, a second data rate that is slower than the first data rate, and a second networking transceiver communicatively coupled with the first networking transceiver to communicatively couple computing devices connected to the first networking transceiver to a multi-lane communication port, the second networking transceiver to negotiate, for the multi-lane communication port, a third data rate for communications between the multi-lane communication port and the second networking transceiver.
    Type: Grant
    Filed: April 29, 2016
    Date of Patent: October 24, 2017
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Kevin B. Leigh, David M. Olson
  • Patent number: 9780828
    Abstract: A transmit/receive switch architecture is provided which reuses a power amplifier's transformer as part of the low noise amplifier (LNA) input matching network. A front-end circuit includes a transmit/receive switch. The transmit/receive switch includes a transformer that includes primary winding and secondary winding. The transmit/receive also includes a transistor, where a drain of the transistor is connected to the secondary winding and a gate of the transistor is configured to receive a control signal. The transmit/receive switch operates as a receive switch when the control signal is low and inputs of the primary winding are either shorted or at open circuit. The transmit/receive switch operates as a transmit switch when the control signal is high.
    Type: Grant
    Filed: March 31, 2016
    Date of Patent: October 3, 2017
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Ali Afsahi, Hongrui Wang
  • Patent number: 9755862
    Abstract: A signal transfer device includes a signal transmitter, a first amplitude adjustment component, an adjustment signal output component, a detector and a second amplitude adjustment component. The signal transmitter outputs signals to first and second transfer paths based on single-phase or differential input signal. The first amplitude adjustment component adjusts at least one of amplitudes of the signals transferred to the first and second transfer paths based on a predetermined amplitude ratio. The adjustment signal output component outputs adjustment signals to the first and second transfer paths. The detector detects the adjustment signals. The second amplitude adjustment component adjusts at least one of the amplitudes of the signals transferred to the first and second transfer paths based on detection result of the detector.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: September 5, 2017
    Assignee: FUNAI ELECTRIC CO., LTD.
    Inventor: Shinichi Kodama
  • Patent number: 9735753
    Abstract: A magnetically-coupled structure is integrated with an integrated circuit in back end-of-line (BEOL) digital CMOS fabrication processes. A differential primary (or secondary) coil is formed by patterning a thick copper (Cu) metal layer, and a single-ended secondary (or primary) coil is formed by patterning a thick aluminum (Al) top metal bonding layer. Crossovers and/or cross-unders are formed using thin metal layers. One embodiment provides a stacked balun with a differential primary input winding defined in the copper layer, directly underneath a single-ended spiral winding defined in the aluminum layer. The spiral forms the single-ended secondary output of the balun and is rotated by 90° to prevent metal shorting for its cross-under connections. Another embodiment provides a transformer with one differential primary (or secondary) coil defined in the copper layer and another differential secondary (or primary) coil defined in the aluminum layer and adding a center tap.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: August 15, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Siraj Akhtar, Richard Francis Taylor, Petteri Litmanen
  • Patent number: 9711041
    Abstract: System, methods and apparatus are described that facilitate transmission of data, particularly between two devices within an electronic apparatus. Data is selectively transmitted as N-phase polarity encoded symbols or as packets on differentially driven connectors. A data transfer method comprises encoding data and control signals in a sequence of symbols to be transmitted on a plurality of connectors, and transmitting the sequence of symbols on the plurality of connectors. Each symbol may be transmitted using a combination of a phase state of a first pair of connectors, a polarity of a second pair of connectors, and a selection of at least one undriven connector. Transmission of each symbol in the sequence of symbols may cause a change of state for at least one of the plurality of connectors.
    Type: Grant
    Filed: March 12, 2013
    Date of Patent: July 18, 2017
    Assignee: QUALCOMM Incorporated
    Inventors: George Alan Wiley, Glenn D. Raskin
  • Patent number: 9686598
    Abstract: A portable, self-powered, interface converter for converting between Ethernet over twisted pair cables and Ethernet over optical fiber is described. In one implementation, the device may include a first interface to a power-over-Ethernet connection and a second interface to provide a connection to receive fiber optic cabling. A power-over-Ethernet (PoE) circuit may derive power from the PoE connection and output a corresponding power signal. A transcoder may perform physical layer conversion between Ethernet communications over twisted pair cabling connected to the first interface and Ethernet communications over the fiber optic cabling. The transcoder may be powered by the power signal output by the PoE circuit.
    Type: Grant
    Filed: June 8, 2015
    Date of Patent: June 20, 2017
    Assignee: Juniper Networks, Inc.
    Inventors: Shreeram Siddhaye, Boris Reynov, Jack Kohn, Euan F. Mowat
  • Patent number: 9571159
    Abstract: Disclosed are various embodiments for communicating information between various electronic components. A local device may comprise a transmitter to convert communication signals into modulated signals. Modulated signals are injected into a shared power supply line. The remote device may comprise a receiver for identifying the injected signal, demodulating the injected signal, and processing the demodulated signal.
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: February 14, 2017
    Assignee: BROADCOM CORPORATION
    Inventor: Murat Mese
  • Patent number: 9496926
    Abstract: A system on a package (SOP) can include a galvanic isolator. The galvanic isolator can include an input stage configured to transmit an input RF signal in response to receiving an input modulated signal. The galvanic isolator can also include a resonant coupler electrically isolated from the input stage by a dielectric. The resonant coupler can be configured to filter the input RF signal and transmit an output RF signal in response to the input RF signal. The galvanic isolator can further include an output stage electrically isolated from the resonant coupler by the dielectric. The output stage can be configured to provide an output modulated signal in response to receiving the output RF signal.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: November 15, 2016
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Bharadvaj Bhamidipati, Swaminathan Sankaran, Mark W. Morgan, Gregory E. Howard, Bradley A. Kramer
  • Patent number: 9438347
    Abstract: In one aspect, an optical media converter is provided for use within aircraft data networks. In one example, the optical media converter converts electrical doublet signals to optical Manchester signals, and vice versa. In an illustrative example, the optical media converter includes a receiver circuit coupled to a fiber optic port for receiving a Manchester-encoded input signal using an edge-coupled filter that filters out signals not associated with edges within the time-varying input signal Manchester signal. The optical media converter also provides, for example, for high common mode rejection and includes logic to correct for bit-width skew. The optical media converter is well-suited for use in converting doublet signals generated by a serial interface module of a line replaceable unit of an ARINC 629-compatible system into optical Manchester signals for transmission over a fiber optic bus system interconnected by a star coupler.
    Type: Grant
    Filed: May 15, 2014
    Date of Patent: September 6, 2016
    Assignee: SANMINA CORPORATION
    Inventors: Robert Benjamin Conger, David R. Porter
  • Patent number: 9385781
    Abstract: The present invention relates generally to addressing performance issues in xDSL communication systems, and more particularly to methods and apparatuses to measure and characterize CM noise impacting a DSL line in a customer premises, measurements and characterization of the projection of these CM signals in Differential Mode (DM), and finally a derivation of an estimate of the loop balance.
    Type: Grant
    Filed: February 23, 2015
    Date of Patent: July 5, 2016
    Assignee: Ikanos Communications, Inc.
    Inventors: Laurent Francis Alloin, James T. Schley May, Arnold Muralt, Vinay Kumar Chapala
  • Patent number: 9287836
    Abstract: A cascode common source and common gate LNAs operating at 60 GHz are introduced and described. The cascode common source LNA is simulated to arrive at an optimum ratio of upper device width to the lower device width. The voltage output of the cascode common source LNA is translated into a current to feed and apply energy to the mixer stage. These input current signals apply the energy associated with the current directly into the switched capacitors in the mixer to minimize the overall power dissipation of the system. The LNA is capacitively coupled to the mixer switches in the I and Q mixers and are enabled and disabled by the clocks generated by the quadrature oscillator. These signals are then amplified by a differential amplifier to generate the sum and difference frequency spectra.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: March 15, 2016
    Assignee: Tensorcom, Inc.
    Inventor: Zaw Soe
  • Patent number: 9197290
    Abstract: Provided are a communication system and a communication device capable of suppressing attenuation of a communication signal superimposed upon a control pilot line. This output circuit (20) sends a control pilot signal which has been generated at a voltage generation source (21) to an input circuit (60). Between the control pilot line (4) and the ground line (3) of the output side of the output circuit (20), a communication unit (30) is connected via a transformer (31). Between the control pilot line (4) and the ground line (3) of the input side of the input circuit (60), a communication unit (70) is connected via a transformer (71). Between the output circuit (20) and the transformer (31), a lowpass filter (33) is interposed. Between the input circuit (60) and the transformer (71), a lowpass filter (73) is interposed.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: November 24, 2015
    Assignees: SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO WIRING SYSTEMS, LTD., AUTONETWORKS TECHNOLOGIES, LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yutaka Komatsu, Takeshi Hagihara, Ryou Okada, Yousuke Takata, Tatsuya Izumi, Kazuhiko Nii, Hiroya Andoh, Yuta Ochiai, Ryuichi Kamaga, Atsushi Iwai, Yukihiro Miyashita, Nobuyuki Nakagawa
  • Patent number: 9118392
    Abstract: A first integrated circuit die receives input data from a plurality of input channels and combines the input data from the plurality of input channels into combined data. The first integrated circuit die transmits the combined data across an isolation communication channel. A second integrated circuit die that is coupled to the isolation communication channel decodes the transmitted combined data and supplies the decoded transmitted combined data to respective output channels corresponding to the input channels.
    Type: Grant
    Filed: September 30, 2013
    Date of Patent: August 25, 2015
    Assignee: Silicon Laboratories Inc.
    Inventors: Siddharth Sundar, Michael J. Mills, Hua Zhu, Riad Wahby, Jeffrey L. Sonntag, Yunteng Huang, Anantha Nag Nemmani
  • Patent number: 9100104
    Abstract: An aircraft includes a first electrical connector configured to couple with a first power cable, a first data communication network and a first modem coupled to first electrical connector and first data communication network and is configured to transmit data received at first electrical connector through first power cable to first data communication network and to transmit data from first data communication network to first power cable through first electrical connector. The aircraft additionally includes a second electrical connector configured to couple with a second power cable, a second data communication network and a second modem coupled to second electrical connector and to second data communication network and is configured to transmit data received at second electrical connector through second power cable to second data communication network and to transmit data from second data communication network to second power cable through second electrical connector.
    Type: Grant
    Filed: May 6, 2013
    Date of Patent: August 4, 2015
    Assignee: The Boeing Company
    Inventors: Nha Thanh Nguyen, Timothy M. Mitchell, Anil Kumar, Radhakrishna G. Sampigethaya, Arun Ayyagari, Sudhakar S. Shetty
  • Patent number: 9094233
    Abstract: In a communication system, nodes are coupled to a transmission path in a bus topology. The nodes communicate with each other via the transmission path using communication signals that have a communication frequency and are synchronized with a power supply signal. Each of the nodes includes a coupling portion that transmits and receives the communication signal and the power supply signal using electromagnetic induction in non-contact with the transmission path. Each of the nodes determines whether a collision of the communication signals occurs on the transmission path based on a voltage level of a signal that has the communication frequency and is induced at the coupling portion.
    Type: Grant
    Filed: November 4, 2013
    Date of Patent: July 28, 2015
    Assignee: DENSO CORPORATION
    Inventors: Yoshie Sugiura, Yuukou Murase, Hirokazu Ooyabu, Fan Wang, Akira Takaoka
  • Patent number: 9088435
    Abstract: A modem for symmetric bi-directional transporting of an Ethernet signal, comprises a port connected to a physical layer module adapted to receive and transmit a single Ethernet signal, a data splitter for splitting the Ethernet signal into the configurable number of downstream data signals, another port comprising the configurable number of DSL ports coupled to the data splitter. Each port is adapted to transmit a separate downstream signal. Each transmitted downstream signal is transmitted via a corresponding telephone line connected to the port. Each port is further adapted to receive a separate upstream signal. Each received upstream signal is received over the corresponding telephone line connected to the DSL port, and a data collection and reorganization unit coupled to the DSL ports and adapted to assemble the upstream signals into the single Ethernet signal for transmission by the physical layer module.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: July 21, 2015
    Assignee: Lantiq Beteiligungs-GmbH & Co.KG
    Inventors: Avinoam Rubinstain, Yackov Sfadya, Shimon Peleg, Noam Alroy, Amnon Harpak, Boaz Porat
  • Publication number: 20150146801
    Abstract: A first communication device is connected in a conductive state to a first power line extending from a secondary side of a transformer in a high-voltage power receiving apparatus to a primary side of breakers in a plurality of distribution boards that receive power supply from the transformer. A plurality of second communication devices are respectively connected to a plurality of second power lines respectively extending from a secondary side of the breakers in the plurality of distribution boards. Each second communication device performs power line communication using the second power line connected thereto as a transmission path. Upon receipt of a communication signal, each of the first communication device and the plurality of second communication devices generates a new communication signal including information included in the communication signal and sends the new communication signal through power line communication.
    Type: Application
    Filed: April 23, 2013
    Publication date: May 28, 2015
    Applicant: MegaChips Corporation
    Inventor: Kengo Tamukai
  • Publication number: 20150139342
    Abstract: The present invention relates to an apparatus for coupling a modem to a power supply network for transmitting data via the power supply network, comprising a mains connection, which is configured to connect the apparatus to a phase conductor, a neutral conductor and a protective earth conductor of the power supply network, with the apparatus comprising a first transformer element comprising a primary side winding, a first secondary side winding and a second secondary side winding, and with the apparatus comprising a second transformer element comprising a primary side winding, a first secondary side winding and a second secondary side winding.
    Type: Application
    Filed: November 17, 2014
    Publication date: May 21, 2015
    Applicant: devolo AG
    Inventors: Gerhard Jagalla, Stephan Thiel
  • Patent number: 9031140
    Abstract: Method and apparatus for transmitting combined power and data. In one embodiment, the apparatus comprises an isolation barrier; a drive controller for generating a first waveform comprising a plurality of data signals for transmitting different types of data, where the drive controller couples the first waveform to a first side of the isolation barrier to produce a second waveform on a second side of the isolation barrier; and a circuit controller coupled to the second side of the isolation barrier, where the circuit controller is powered by the second waveform, and where the circuit controller controls a circuit based on the plurality of data signals.
    Type: Grant
    Filed: December 19, 2012
    Date of Patent: May 12, 2015
    Assignee: Enphase Energy, Inc.
    Inventor: Donald Richard Zimmanck
  • Patent number: 9025583
    Abstract: A system for the coexistence between a plurality of wireless communication modules sharing a single antenna is provided, including an antenna, first and second transceiving paths, and first and second wireless communications modules. The first transceiving path is coupled to the antenna. The second transceiving path is coupled to the first transceiving path. The first wireless communications module is coupled to the first transceiving path and transmits or receives a plurality of first wireless signals. The second wireless communications module is coupled to the second transceiving path and transmits or receives a plurality of second wireless signals, wherein signal strengths of the second wireless signals passing through the second transceiving path are attenuated by a certain level, and the attenuated second wireless signals are added to the first wireless signals when passing through the first transceiving path.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: May 5, 2015
    Assignee: Mediatek Inc.
    Inventors: Hsien-Chyi Chiou, Shu-Ping Shiu, Hong-Kai Hsu, Yuan-Hung Chung, Wei Wang, Ren-Yuh Liang
  • Patent number: 9014248
    Abstract: Systems and methods are provided for common mode testing for a system using an Ethernet subsystem. The Ethernet subsystem generates test signals that can be introduced at various points in the system to detect the effect of noise introduced by various elements of the system. By introducing test signals at various points in a system, common mode noise introduced into the system can be more accurately determined.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: April 21, 2015
    Assignee: Broadcom Corporation
    Inventors: Wael William Diab, William Bliss
  • Patent number: 9001901
    Abstract: A receiver includes a positive pulse determination circuit and a negative pulse determination circuit. The positive pulse determination circuit outputs a first L-level between when a pulse signal having a negative amplitude is detected and when neither a pulse signal having a positive amplitude nor a pulse signal having a negative amplitude is detected; otherwise a first H-level if a pulse signal having a positive amplitude is detected during another period. The negative pulse determination circuit outputs a second L-level between when a pulse signal having a positive amplitude is detected and when neither a pulse signal having a positive amplitude nor a pulse signal having a negative amplitude is detected; otherwise a second H-level is output if a pulse signal having a negative amplitude is detected during the other period.
    Type: Grant
    Filed: June 3, 2014
    Date of Patent: April 7, 2015
    Assignee: Renesas Electronics Corporation
    Inventors: Koichi Takeda, Shunichi Kaeriyama
  • Patent number: 8989691
    Abstract: Power supply rejection in a single-ended receiver, through impedance balancing, is described. The single-ended receiver includes a first low noise amplifier and a second low noise amplifier. The single-ended receiver also includes a multi-port coupled transformer that outputs a differential signal. The multi-port coupled transformer includes a first primary coil that is coupled to an output of the first low noise amplifier and a second primary coil. The single-ended receiver also includes balancing impedances at the output of each of the low noise amplifiers. These impedances can be configured such that the on impedance of the first low noise amplifier equals the combined impedance of the off impedance of the second low noise amplifier and the balancing impedance. This balancing of impedances on the first and second primary coils results in power supply rejection of noise and spurious signals.
    Type: Grant
    Filed: December 3, 2012
    Date of Patent: March 24, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Ojas M Choksi, Wei Zhuo
  • Patent number: 8964862
    Abstract: A method for transmitting digital data via a line includes the steps of providing a clock signal and of transmitting the digital data in synchrony with the clock signal, the clock signal having a frequency that is variable over time.
    Type: Grant
    Filed: September 1, 2011
    Date of Patent: February 24, 2015
    Assignee: Robert Bosch GmbH
    Inventor: Armin Himmelstoss
  • Patent number: 8950784
    Abstract: A communication system is disclosed for use with a train consist. The consist communication system may have a first fluid conduit, a first coupling connected to the first fluid conduit, a first cover connected to the first coupling and configured to close an end of the first fluid conduit, and at least a first cable disposed within the first fluid conduit. The system may also have a second fluid conduit substantially identical to the first fluid conduit, a second coupling substantially identical to the first coupling, fixedly connected to the second fluid conduit, and connectable to the first coupling, and a second cover connected to the second coupling and configured to close an end of the second fluid conduit. At least a second cable may be disposed within the second fluid conduit in communication with the at least a first cable through the first and second covers. The first and second fluid conduits may be pressurized.
    Type: Grant
    Filed: May 31, 2012
    Date of Patent: February 10, 2015
    Assignee: Electro-Motive Diesel, Inc.
    Inventor: Dale A. Brown
  • Patent number: 8948276
    Abstract: In a semiconductor device, a transmitting circuit generates a delayed data signal and a first delayed retransmission request signal by delaying a data signal and a first retransmission request signal, respectively, and outputs a pulse signal at an edge of the delayed data signal and the first delayed retransmission request signal and prohibits output of the pulse signal at an edge of the first delayed retransmission request signal during a specified period across an edge of the delayed data signal.
    Type: Grant
    Filed: April 10, 2013
    Date of Patent: February 3, 2015
    Assignee: Renesas Electronics Corporation
    Inventor: Shunichi Kaeriyama
  • Publication number: 20150030089
    Abstract: Systems for communicating over a communication interface are provided. An integrated circuit includes circuitry for monitoring a current flowing between two terminals of the integrated circuit. The integrated circuit also includes a voltage driver circuit for modulating a voltage between two terminals of the integrated circuit. The voltage driver modulates the voltage across the two terminals of the integrated circuit to encode data according to the Highway Addressable Remote Transducer protocol.
    Type: Application
    Filed: July 26, 2013
    Publication date: January 29, 2015
    Applicant: General Electric Company
    Inventors: Daniel Milton Alley, Bruce Henderson, Vitaly Alexandrovich Tkachuk, Longhui Shen, Ye Xu, Alan Carroll Lovell
  • Patent number: 8938038
    Abstract: Techniques for expanding the set of addressable interfering signals in an interference cancelling receiver are described, where the task of control message detection from interfering cells is integrated in an iterative receiver process where increasingly better a priori information on the received data signals from the previous iteration is used to detect additional control messages and successively grow the set of interfering signals included in the receiver's interference mitigation processing. In an example method, first estimated symbols for a desired signal are generated. A control channel corresponding to a first interfering signal is detected, where said detecting is based on the first estimated symbols. Signal characteristics information for the first interfering signal is then derived from the detected control channel signal, and used to generate second estimated symbols for the desired signal, using an interference-mitigation technique to mitigate the effects of the interfering signal.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: January 20, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Andres Reial, Anders Wallén
  • Patent number: 8929468
    Abstract: An Ethernet cable connection system is disclosed. The system includes a magnetic package having a line interface to couple to a plurality of Ethernet line conductors, and a PHY interface to couple to a plurality of transceiver circuits corresponding to the line conductors. The magnetic package is operable to isolate the line conductors from the corresponding transceiver circuits. The system also includes a termination impedance network and a common-mode detection circuit. The termination impedance network is coupled to the magnetic package line interface. The common-mode detection circuit includes a sense impedance coupled to the termination impedance network that is operable to detect a common-mode signal associated with at least one of the plurality of Ethernet line conductors. A bypass path feeds the detected common-mode signal to the plurality of transceiver circuits without isolation by the magnetic package.
    Type: Grant
    Filed: June 14, 2012
    Date of Patent: January 6, 2015
    Assignee: Aquantia Corp.
    Inventors: Daniel E. Voigt, Paul Langner
  • Patent number: 8923418
    Abstract: A phase shifting stage is disclosed. The phase shifting stage includes first and second transistors. Second terminals of the first transistor and the second transistor are coupled to a first current tail node. A third transistor and a fourth transistor have second terminals that are coupled to a second current tail node. Also included is a first transformer having a primary winding with first and second inputs and a secondary winding. The first input is coupled to the first terminals of the first and third transistors, and the second input is coupled to the first terminals of the second and the fourth transistors. A common input stage having high power gain and phase commutating cascode stages in asymmetrical transformer output demultiplexing (ATODEM) branches is also provided. The common input stage limits the noise generated at an input stage by substantially canceling out the noise at an output transformer of the ATODEM.
    Type: Grant
    Filed: March 16, 2012
    Date of Patent: December 30, 2014
    Assignee: RF Micro Devices, Inc.
    Inventors: Jeppe Korshøj Bendixen, Ruediger Bauder
  • Publication number: 20140376647
    Abstract: According to one embodiment of the invention, an integrated circuit comprises an encoding module, a modulation module and a spectral shaped module. The encoding module includes an interleaver that adapted to operate in a plurality of modes including a first mode and a second mode. The interleaver performs repetitive encoding when placed in the second mode. The modulation module is adapted to compensate for attenuations that are to be realized during propagation of a transmitted signal over the power line. The spectral shaped module is adapted to compensate for amplitude distortion and further compensates for attenuations that will be realized during propagation of the transmitted signal over the power line.
    Type: Application
    Filed: July 15, 2014
    Publication date: December 25, 2014
    Inventors: Kaveh Razazian, Maher Umari, Amir Hosein Kamalizad, Victor V. Loginov, Michael V. Navid
  • Publication number: 20140369433
    Abstract: A transformer arrangement for signal transmission is provided, the transformer arrangement having at least one transformer with a primary coil and a secondary coil and a controller. The controller is configured in a magnetization phase to control a first current to flow through the primary coil to increase until a predefined criterion is fulfilled, wherein the magnetization phase is longer than a time constant of the primary coil of the at least one transformer. The controller is configured in a voltage application phase to apply a voltage to the at least one transformer so that a second current flows through the primary coil, wherein the second current has a polarity which changes during the voltage application phase compared with the first current, wherein the voltage application phase is shorter than two times the time constant of the primary coil of the at least one transformer.
    Type: Application
    Filed: June 16, 2014
    Publication date: December 18, 2014
    Inventor: Martin Feldtkeller
  • Patent number: 8908780
    Abstract: According to one embodiment, a protective relay performs the following steps. A/D converter 11 acquires an electric current of a power transmission line 4 via a CT 5. A computing part 12 performs various protection computations such as current differential computation using a current data measured at the end of itself and a current data measured at the opposite end. A transmitting and receiving circuit 13 transmits the current data of itself to the other protective relay 1 at the opposite end via a transmission path 3. A received level detection part 14 detects the received level of the transmission data that has been transmitted from the opposite end and received by the transmitting and receiving circuit 13.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: December 9, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Atsushi Takeuchi, Masanori Shimada
  • Patent number: 8903020
    Abstract: A radio signal receiving system for providing a signal to a transceiver includes a signal retrieving module and a signal processing module. The signal retrieving module retrieves a radio signal through one of a conducting wire in an electrical outlet, a conducting wire in a vehicular cigarette lighter, and a metallic vehicular casing. The radio signal receiving system operates without any conventional self-contained antenna and includes a radio signal receiving carrier which is either made from a conventional conducting wire or made of a metal to thereby enhance the efficiency of signal reception.
    Type: Grant
    Filed: November 19, 2012
    Date of Patent: December 2, 2014
    Assignee: Yi Chang Hsiang Industrial, Co., Ltd.
    Inventor: Gary Wang
  • Patent number: 8903009
    Abstract: Common-mode termination within communication systems. Termination is implemented with respect to two respective portions of a system: the intentional signaling within a communication system as well as any unintentional signaling which may be coupled into the system. Such unintentional signaling may be incurred in a variety of ways including via interference which may be generated by the system itself or by other devices or components external to the system. In addition, such unintentional signaling made be characterized as common-mode (CM) signaling, in that, it generally affects different respective portions of the system similarly or in the same manner. Various communication systems may include two or more devices implemented therein, that effectuate signaling via one or more communication links there between. Appropriate termination is made with respect to both the intentional and unintentional signaling portion of the system using any of a variety of impedance types (e.g.
    Type: Grant
    Filed: November 9, 2012
    Date of Patent: December 2, 2014
    Assignee: Broadcom Corporation
    Inventors: Neven Pischl, Ahmad Chini
  • Patent number: 8897379
    Abstract: A digital communication system comprising a host and a client, the host calls the client via two transmission lines. The host includes a processor, a first control unit, a second control unit, a high frequency transformer and an interface unit. The digital communication system utilizes the first control unit and the high frequency transformer to modulate outgoing signals. The digital communication system utilizes the second unit and the high frequency transformer to demodulate incoming signals.
    Type: Grant
    Filed: August 1, 2012
    Date of Patent: November 25, 2014
    Assignees: Fu Tai Hua Industry (Shenzhen) Co., Ltd., Hon Hai Precision Industry Co., Ltd.
    Inventors: Ren-Wen Huang, Yang Xin, Qiang You, Chong-Jin Ma, Tsung-Jen Chuang
  • Patent number: 8879645
    Abstract: A communication circuit includes a receiver circuit that provides differential communication by using first and second transmission paths which transmit first and second signals. The receiver circuit includes a compensation circuit that compensates for the attenuation of a current when common mode noise is superimposed on the first signal and on the second signal. The compensation circuit includes a first compensation circuit and a second compensation circuit. The first compensation circuit detects an electric current attenuation of the first signal when the common mode noise is superimposed thereon, and compensates for the attenuation thereof by adding the detected electric current attenuation to the second signal. The second compensation circuit detects an electric current attenuation of the second signal when the common mode noise is superimposed thereon, and compensates for the attenuation thereof by adding the detected electric current attenuation to the first signal.
    Type: Grant
    Filed: June 10, 2013
    Date of Patent: November 4, 2014
    Assignee: Renesas Electronics Corporation
    Inventor: Shigeyuki Okabe
  • Publication number: 20140307812
    Abstract: A power line communication device and a power control method thereof are provided. The power line communication device, coupled to a power line in a power line communication system, includes a transmitter, a power coupler, a signal detector and a controller. The transmitter is configured to produce a transmit signal. The power coupler, coupled to the transmitter, is configured to couple the transmit signal to the power line. The signal detector, coupled between the transmitter and the power coupler, is configured to detect the transmit signal. The controller, coupled to the transmitter and the signal detector, is configured to adapt a dynamic range of the transmitter based on the detected transmit signal without conducting a channel sounding procedure.
    Type: Application
    Filed: April 15, 2013
    Publication date: October 16, 2014
    Applicant: MediaTek Inc.
    Inventor: Kuo-Hsin CHEN
  • Patent number: 8855216
    Abstract: A method for supplying at least one bus user via a control unit, in which data are transmitted to at least one bus user during at least one phase for data transmission and power is transmitted during at least one phase for power transmission, the at least one phase for data transmission and the at least one phase for power transmission being provided alternately, and the lengths of the phases for data transmission and/or the lengths of the phases for power transmission being set variably.
    Type: Grant
    Filed: March 1, 2011
    Date of Patent: October 7, 2014
    Assignee: Robert Bosch GmbH
    Inventor: Christian Ohl
  • Patent number: 8855222
    Abstract: Certain aspects of the present disclosure relate to a method for generating a frame structure suitable for use in both single carrier (SC) and Orthogonal Frequency Division Multiplexing (OFDM) transmission modes, while ensuring accurate channel estimation at a receiver.
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: October 7, 2014
    Assignee: QUALCOMM Incorporated
    Inventor: Ismail Lakkis