Patents by Inventor Johan Wernehag

Johan Wernehag has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10348356
    Abstract: A transceiver suitable for frequency division duplex (FDD) communication is disclosed. In one exemplary embodiment, a transmitter leakage reduction circuit for a transceiver is described. The transmitter leakage reduction circuit comprises an auxiliary power amplifier, first and second filters, and a signal transmission arrangement. The auxiliary power amplifier is configured to provide an auxiliary power amplifier output signal that represents an output signal of a power amplifier of the transmitter with a controllable phase shift or gain output. The first and second filters are configured to attenuate any signals in the receive frequency band of the respective power amplifier output signal and auxiliary power amplifier output signal. The signal transmission arrangement is configured to suppress a contribution of the power amplifier output signal from a signal received from an RF connecting point using the auxiliary power amplifier output signal to obtain a received signal that is input to the receiver.
    Type: Grant
    Filed: February 27, 2018
    Date of Patent: July 9, 2019
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Stefan Andersson, Imad ud Din, Daniel Eckerbert, Henrik Sjöland, Johan Wernehag
  • Patent number: 10084506
    Abstract: A transceiver front-end for a communication device is connectable to a signal transmission and reception arrangement adapted to transmit a transmit signal having a transmit frequency and to receive a receive signal having a receive frequency. The transceiver front-end is also connectable to a transmitter adapted to produce the transmit signal, and to a receiver adapted to process the receive signal. The transceiver front-end comprises a transmit frequency suppression filter arrangement and a receive frequency suppression filter arrangement. The transmit frequency suppression filter arrangement is adapted to suppress transfer of a signal having the transmit frequency and to pass a signal having the receive frequency. The receive frequency suppression filter arrangement is adapted to suppress transfer of a signal having the receive frequency and to pass a signal having the transmit frequency.
    Type: Grant
    Filed: November 7, 2013
    Date of Patent: September 25, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Henrik Sjoland, Stefan Andersson, Imad ud Din, Johan Wernehag
  • Patent number: 10027465
    Abstract: A transceiver arrangement comprises a receiver arranged for frequency-division duplex communication with a communication network; a transmitter arranged for frequency-division duplex communication with the communication network; an transmission port for connecting to an antenna; a balancing impedance circuit arranged to provide an adaptive impedance arranged to mimic the impedance at the transmission port; and a filtering arrangement, which comprises filters of a first type and filters of a second type, connecting the receiver, transmitter, transmission port and balancing impedance circuit. The filters of the first type are arranged to pass signals at transmitter frequency and attenuate signals at receiver frequency and are connected between the transmitter and the transmission port and between the receiver and the balancing impedance circuit.
    Type: Grant
    Filed: April 26, 2013
    Date of Patent: July 17, 2018
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventors: Henrik Sjöland, Stefan Andersson, Johan Wernehag
  • Publication number: 20180191396
    Abstract: A transceiver suitable for frequency division duplex (FDD) communication is disclosed. In one exemplary embodiment, a transmitter leakage reduction circuit for a transceiver is described. The transmitter leakage reduction circuit comprises an auxiliary power amplifier, first and second filters, and a signal transmission arrangement. The auxiliary power amplifier is configured to provide an auxiliary power amplifier output signal that represents an output signal of a power amplifier of the transmitter with a controllable phase shift or gain output. The first and second filters are configured to attenuate any signals in the receive frequency band of the respective power amplifier output signal and auxiliary power amplifier output signal. The signal transmission arrangement is configured to suppress a contribution of the power amplifier output signal from a signal received from an RF connecting point using the auxiliary power amplifier output signal to obtain a received signal that is input to the receiver.
    Type: Application
    Filed: February 27, 2018
    Publication date: July 5, 2018
    Inventors: Stefan Andersson, Imad ud Din, Daniel Eckerbert, Henrik Sjöland, Johan Wernehag
  • Patent number: 10014894
    Abstract: A down-conversion circuit for a receiver circuit is disclosed, the down-conversion circuit comprises a first passive switching mixer arranged to down-convert a received radio frequency, RF, signal with a first local oscillator, LO, signal (LO1) having a first duty cycle for generating a first down-converted signal at an output port of the first passive switching mixer. The down-conversion circuit further comprises a second passive switching mixer arranged to down-convert the received RF signal with a second LO signal (LO2) having the same LO frequency as the first LO signal (LO1) and a second duty cycle, different from the first duty cycle, for generating a second down-converted signal at an output port of the second passive switching mixer.
    Type: Grant
    Filed: April 27, 2016
    Date of Patent: July 3, 2018
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Imad Ud Din, Stefan Andersson, Henrik Sjoland, Johan Wernehag
  • Patent number: 9923593
    Abstract: A transceiver suitable for frequency duplex division communication is disclosed. The transceiver comprises a transmitter, wherein the transmitter comprises a power amplifier; a receiver; an auxiliary power amplifier which is arranged to provide a controllable phase shift and gain output; a first filter arranged at an output of the power amplifier arranged to attenuate frequencies at a receiving frequency of the receiver; a second filter arrangement at an output of the auxiliary power amplifier arranged to attenuate frequencies at a receiving frequency of the receiver; and a signal transmission arrangement. The signal transmission arrangement is arranged to transmit signals provided from the transmitter through its power amplifier to a radio frequency, RF, connecting point, receive signals from the RF connecting point and provide the signals to the receiver, and provide signals from the auxiliary amplifier towards an input of the receiver.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: March 20, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan Andersson, Imad ud Din, Daniel Eckerbert, Henrik Sjöland, Johan Wernehag
  • Patent number: 9871552
    Abstract: A transceiver arrangement comprises a receiver arranged for frequency-division duplex communication with a communication network; a transmitter arranged for frequency-division duplex communication with the communication network; a transmission port for connecting to an antenna or wire; a first filter connected between an output of the transmitter and the transmission port and arranged to pass signals at transmitter frequency and attenuate signals at receiver frequency; a transformer having a primary winding and a secondary winding, wherein the primary winding has one of its terminals connected to the transmission port; a second filter connected between another of the terminals of the primary winding and a reference voltage and arranged to attenuate signals at transmitter frequency and pass signals at receiver frequency; and an adaptive impedance circuit arranged to provide an adjustable resistance, connected between the output of the transmitter and the junction between the second filter and the another of th
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: January 16, 2018
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Imad ud Din, Stefan Andersson, Daniel Eckerbert, Henrik Sjöland, Johan Wernehag
  • Patent number: 9853801
    Abstract: A transceiver arrangement comprising a receiver and a transmitter arranged for frequency-division duplex communication with a communication network, a transmission port for connecting to an antenna, a balancing impedance circuit arranged to provide an adaptive impedance arranged to mimic the impedance at the transmission port, a filtering arrangement connecting the receiver, transmitter, transmission port and balancing impedance circuit, and a common-mode signal reduction circuit is disclosed.
    Type: Grant
    Filed: October 4, 2013
    Date of Patent: December 26, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Henrik Sjoland, Johan Wernehag, Stefan Andersson
  • Patent number: 9853621
    Abstract: A transformer filter arrangement including a transformer having a first winding and a second winding is provided. Both of the first and the second windings are located between an outer border and an inner border, which is inside the outer border. The transformer filter arrangement further includes at least one reactive sub circuit, each including at least one inductor. The first winding of the transformer is divided into a plurality of winding segments. At least a first one of the at least one reactive sub circuit being connected in series with the winding segments of the first winding between two such winding segments, and having at least one of the at least one inductor located inside said inner border.
    Type: Grant
    Filed: February 16, 2016
    Date of Patent: December 26, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (Publ)
    Inventors: Stefan Andersson, Fenghao Mu, Johan Wernehag
  • Patent number: 9793943
    Abstract: A duplexer-less transceiver arrangement is disclosed. The transceiver comprises a receiver configured for frequency-division duplex communication with a communication network; a transmitter configured for frequency-division duplex communication with the communication network; an antenna port for connecting to an antenna; a balancing impedance circuit arranged to provide an adaptive impedance arranged to mimic the impedance at the antenna port; and an impedance network differentially connecting the receiver, transmitter, antenna port and balancing impedance circuit, wherein the impedance network includes a cross-connection.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: October 17, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Henrik Sjöland, Stefan Andersson, Tobias Tired, Johan Wernehag
  • Publication number: 20170230076
    Abstract: A duplexer-less transceiver arrangement is disclosed. The transceiver comprises a receiver configured for frequency-division duplex communication with a communication network; a transmitter configured for frequency-division duplex communication with the communication network; an antenna port for connecting to an antenna; a balancing impedance circuit arranged to provide an adaptive impedance arranged to mimic the impedance at the antenna port; and an impedance network differentially connecting the receiver, transmitter, antenna port and balancing impedance circuit, wherein the impedance network includes a cross-connection.
    Type: Application
    Filed: April 25, 2017
    Publication date: August 10, 2017
    Inventors: Henrik Sjöland, Stefan Andersson, Tobias Tired, Johan Wernehag
  • Patent number: 9680521
    Abstract: A transceiver front-end is connectable to a signal transmission and reception arrangement adapted to transmit and receive with respective frequencies. The transceiver front-end comprises at least one of a transmit frequency blocking arrangement and a receive frequency blocking arrangement. For instance, the transmit frequency blocking arrangement has a blocking and non-blocking frequency interval associated with the transmit frequency and receive frequency, respectively, and is adapted to block passage of transmit frequency signals between the signal transmission and reception arrangement and the receiver. At least one of the transmit frequency blocking arrangement and the receive frequency blocking arrangement comprises a network of passive components comprising at least one transformer and a frequency translated impedance adapted to have a higher impedance value in the blocking frequency interval than in the non-blocking frequency interval.
    Type: Grant
    Filed: July 9, 2012
    Date of Patent: June 13, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan Andersson, Imad ud Din, Henrik Sjöland, Tobias Tired, Johan Wernehag
  • Patent number: 9667404
    Abstract: A duplexer-less transceiver arrangement (300) is disclosed. The transceiver comprises a receiver (302) arranged for frequency-division duplex communication with a communication network; a transmitter (304) arranged for frequency-division duplex communication with the communication network; an antenna port (306) for connecting to an antenna; a balancing impedance circuit (308) arranged to provide an adaptive impedance arranged to mimic the impedance at the antenna port; and an impedance network differentially connecting the receiver (302), transmitter (304), antenna port (306) and balancing impedance circuit (308), wherein the impedance network includes a cross-connection.
    Type: Grant
    Filed: May 29, 2013
    Date of Patent: May 30, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Henrik Sjöland, Stefan Andersson, Tobias Tired, Johan Wernehag
  • Patent number: 9548155
    Abstract: A transformer filter arrangement (30) for passing signals at a fundamental frequency and suppressing signals at one or more interfering frequencies is disclosed. It comprises a transformer (100) having a first winding (110) and a second winding (120), wherein the first winding (110) has a first end (112a) and a second end (122b) and the second winding (120) has a first end (122a) and a second end (122b). It further comprises one or more capacitors (130a-e).
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: January 17, 2017
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan Andersson, Fenghao Mu, Johan Wernehag
  • Patent number: 9509273
    Abstract: A transformer filter arrangement including a transformer having a first winding and a second winding is provided. Both of the first and the second windings are located between an outer border and an inner border, which is inside the outer border. The transformer filter arrangement further includes at least one reactive sub circuit, each including at least one inductor. The first winding of the transformer is divided into a plurality of winding segments. At least a first one of the at least one reactive sub circuit being connected in series with the winding segments of the first winding between two such winding segments, and having at least one of the at least one inductor located inside said inner border.
    Type: Grant
    Filed: June 28, 2012
    Date of Patent: November 29, 2016
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Stefan Andersson, Fenghao Mu, Johan Wernehag
  • Publication number: 20160254898
    Abstract: A transceiver arrangement comprising a receiver and a transmitter arranged for frequency-division duplex communication with a communication network, a transmission port for connecting to an antenna, a balancing impedance circuit arranged to provide an adaptive impedance arranged to mimic the impedance at the transmission port, a filtering arrangement connecting the receiver , transmitter, transmission port and balancing impedance circuit, and a common-mode signal reduction circuit is disclosed.
    Type: Application
    Filed: October 4, 2013
    Publication date: September 1, 2016
    Inventors: Henrik Sjoland, Johan Wernehag, Stefan Andersson
  • Publication number: 20160241281
    Abstract: A down-conversion circuit for a receiver circuit is disclosed, the down-conversion circuit comprises a first passive switching mixer arranged to down-convert a received radio frequency, RF, signal with a first local oscillator, LO, signal (LO1) having a first duty cycle for generating a first down-converted signal at an output port of the first passive switching mixer. The down-conversion circuit further comprises a second passive switching mixer arranged to down-convert the received RF signal with a second LO signal (LO2) having the same LO frequency as the first LO signal (LO1) and a second duty cycle, different from the first duty cycle, for generating a second down-converted signal at an output port of the second passive switching mixer.
    Type: Application
    Filed: April 27, 2016
    Publication date: August 18, 2016
    Inventors: Imad Ud Din, Stefan Andersson, Henrik Sjoland, Johan Wernehag
  • Publication number: 20160164486
    Abstract: A transformer filter arrangement including a transformer having a first winding and a second winding is provided. Both of the first and the second windings are located between an outer border and an inner border, which is inside the outer border. The transformer filter arrangement further includes at least one reactive sub circuit, each including at least one inductor. The first winding of the transformer is divided into a plurality of winding segments. At least a first one of the at least one reactive sub circuit being connected in series with the winding segments of the first winding between two such winding segments, and having at least one of the at least one inductor located inside said inner border.
    Type: Application
    Filed: February 16, 2016
    Publication date: June 9, 2016
    Inventors: Stefan ANDERSSON, Fenghao MU, Johan WERNEHAG
  • Patent number: 9356634
    Abstract: A down-conversion circuit for a receiver circuit is disclosed, the down-conversion circuit comprises a first passive switching mixer arranged to down-convert a received radio frequency, RF, signal with a first local oscillator, LO, signal (LO1) having a first duty cycle for generating a first down-converted signal at an output port of the first passive switching mixer. The down-conversion circuit further comprises a second passive switching mixer arranged to down-convert the received RF signal with a second LO signal (LO2) having the same LO frequency as the first LO signal (LO1) and a second duty cycle, different from the first duty cycle, for generating a second down-converted signal at an output port of the second passive switching mixer.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: May 31, 2016
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
    Inventors: Imad ud Din, Stefan Andersson, Henrik Sjoland, Johan Wernehag
  • Patent number: 9344039
    Abstract: A down-conversion circuit for a receiver circuit is disclosed. It comprises a first mixer arranged to down-convert an RF signal with a first LO signal (LO1), thereby generating a first down-converted signal. It further comprises a second mixer arranged to down-convert the RF signal with a second LO signal (LO2) having the same LO frequency as the first LO signal (LO1), but a different and a second duty cycle, thereby generating a second down-converted signal. The second mixer has an enabled and a disabled mode. The down-conversion circuit also comprises a third mixer arranged to down-convert the RF signal with the second LO signal (LO2), thereby generating a third down-converted signal.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: May 17, 2016
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Imad Ud Din, Stefan Andersson, Henrik Sjoland, Fredrik Tillman, Johan Wernehag