Including Plural Amplifier Channels Patents (Class 330/295)
  • Publication number: 20150137890
    Abstract: Device and methods for improving consistency of operation and therefore yield of sealable periphery amplifiers is described, Amplifier size of the scalable periphery architecture can be adjusted to obtain part-to-part consistency of operating performance as per a defined/desired set of criteria. Amplifier segments of the scalable periphery architecture can be rotated to distribute wear. Further, extra amplifier segments can be implemented on amplifier dies to extend the overall lifetime of amplifiers.
    Type: Application
    Filed: November 15, 2013
    Publication date: May 21, 2015
    Applicant: PEREGRINE SEMICONDUCTOR CORPORATION
    Inventor: Dan William Nobbe
  • Publication number: 20150137845
    Abstract: Methods and devices are disclosed for testing an electronic assembly comprising a number of segments. In one embodiment, a scalable periphery amplifier may comprise a number of amplifier segments. In one embodiment a method of testing the amplifier segments in a scalable periphery architecture is described. One or more of the amplifier segments can be independently turned on and/or turned off to achieve desired impedance characteristics of the overall amplifier to test the scalable periphery amplifier. In another embodiment, the electronic assembly comprises digitally tunable capacitors.
    Type: Application
    Filed: November 15, 2013
    Publication date: May 21, 2015
    Applicant: Peregrine Semiconductor Corporation
    Inventor: Chris Olson
  • Publication number: 20150137891
    Abstract: A multi-mode power amplifier comprises a regulation control circuit, an AMP 1, a demultiplexer, an AMP 2, a low power output matching circuit, a medium power output matching circuit, and a high power output matching circuit. In low power mode, the regulation control circuit controls AMP 1 to work in a first power mode, and controls the demultiplexer to couple an output terminal of AMP 1 to the low power output matching circuit. In to medium power mode, the regulation control circuit controls AMP 1 to work in a second power mode, and controls the demultiplexer to couple an output terminal of AMP 1 to the medium power output matching circuit. In high power mode, the regulation control circuit controls AMP 1 to work in the second power mode, and controls the demultiplexer to couple an output terminal of AMP 1 to AMP 2.
    Type: Application
    Filed: August 14, 2014
    Publication date: May 21, 2015
    Applicant: China Uni-Chip Technologies Inc.
    Inventor: Kai Xuan
  • Publication number: 20150137889
    Abstract: Devices and methods for improving reliability of sealable periphery amplifiers is described. Amplifier segments of the sealable periphery architecture can be rotated to distribute wear. Further, extra amplifier segments can be implemented on amplifier dies to extend the overall lifetime of amplifiers.
    Type: Application
    Filed: November 15, 2013
    Publication date: May 21, 2015
    Applicant: Peregrine Semiconductor Corporation
    Inventor: Chris Olson
  • Publication number: 20150130541
    Abstract: A Doherty amplifier (300) is provided, it comprises: a main amplifier (301) and a peak amplifier (302); a first microstrip (303) with ?/4 electric length connected between the main amplifier and the peak amplifier; a second microstrip (304) with electric length connected between a junction of outputs of the peak amplifier and the main amplifier, and an output terminal (306); at least a tuner (305) for adjusting radius of VSWR circle of the main amplifier and connected, in series with the first microstrip (303), between the main amplifier (301) and the peak amplifier (302) based on input signal power. The hack-off power level efficiency is increased by enlarge the VSWR radius with the new Doherty structure.
    Type: Application
    Filed: June 21, 2012
    Publication date: May 14, 2015
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Zhongyu Liao, Yuanchun Xie
  • Patent number: 9030260
    Abstract: An amplifying structure includes a main amplifier configured to amplify a first signal; and a peak amplifier configured to amplify a second signal, each of the main amplifier and the peak amplifier including, respectively, a hybrid power device, the hybrid power device including, a first power transistor die configured to amplify signals of a first frequency, and a second power transistor die configured to amplify signals of a second frequency different than the first frequency.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: May 12, 2015
    Assignee: Alcatel Lucent
    Inventor: Noureddine Outaleb
  • Publication number: 20150126136
    Abstract: Exemplary embodiments are related to a low-noise amplifier (LNA) matching device. A device may include an antenna for receiving a wireless signal and at least one LNA. The device may further include an LNA matching device coupled between the antenna and the at least one LNA and configured to receive one or more control signals to provide an optimal LNA match setting for each band of a plurality of frequency bands.
    Type: Application
    Filed: November 7, 2013
    Publication date: May 7, 2015
    Applicant: QUALCOMM Incorporated
    Inventors: Robert Lloyd Robinett, Ali Morshedi
  • Publication number: 20150123734
    Abstract: An amplifier including a main amplifier circuit and at least one peaking amplifier circuit. The peaking amplifier circuit is selectively operable to operate in combination with the main amplifier circuit. The main amplifier circuit and the peaking amplifier circuit each include an active device operation as an inverse Class-F amplifier element. The main amplifier circuit and the peaking amplifier circuit also each include a combined matching and resonator network coupled with an output of the respective active device so the active device operates as an inverse Class-F device, and a combined matching and resonator network coupled with an input of the respective active device.
    Type: Application
    Filed: May 16, 2014
    Publication date: May 7, 2015
    Applicant: ANDREW LLC
    Inventors: Marcello Donati, Fortunato Facchinetti
  • Publication number: 20150123735
    Abstract: An envelope tracking power amplifier system comprising an RF input path and an envelope path for providing a modulated power amplifier supply, further comprising a plurality of envelope detectors for detecting the envelope of a plurality of frequency bands of an input signal and each generating an output signal, and a combiner for combining the output of the envelope detectors.
    Type: Application
    Filed: October 21, 2014
    Publication date: May 7, 2015
    Inventor: Gerard Wimpenny
  • Patent number: 9024690
    Abstract: An amplification unit is provided. The amplification unit, comprises a first amplifier, a second amplifier, a first sensor, a first predistortion component, and a signal combiner. The first amplifier amplifies a first signal to produce a second signal. The first sensor produces a third signal based on the second signal. The second amplifier turns on and to amplifies a fourth signal to produce a fifth signal when the amplitude of the fourth signal exceeds a threshold amplitude and turns off when the amplitude of the fourth signal is less than the threshold amplitude. The first predistortion component produces the first signal based on a first input signal, based on the third signal, and based on an on-off state of the second amplifier. The signal combiner produces an output of the amplification unit based on the second signal and the fifth signal.
    Type: Grant
    Filed: July 11, 2011
    Date of Patent: May 5, 2015
    Assignee: RPX Clearinghouse LLC
    Inventors: Scott Widdowson, Gregory Bowles, Arthur Fuller
  • Publication number: 20150116039
    Abstract: A device includes a power splitter configured to couple to an amplifier having a first path and a second path. The device includes a controller coupled to first and second variable attenuators and first and second adjustable phase shifters. The controller is configured to monitor a phase shift and an output power of each of the first path and second path of the amplifier, and adjust at least one of the first and second variable attenuators and the first and second adjustable phase shifters based upon the phase shift and the output power of each of the first path and second path of the amplifier to modify an input signal to the first path or the second path of the amplifier.
    Type: Application
    Filed: October 29, 2013
    Publication date: April 30, 2015
    Applicant: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Abdulrhman M.S. Ahmed, Paul R. Hart, Joseph Staudinger
  • Publication number: 20150119107
    Abstract: An integrated Doherty amplifier structure comprising; a main amplifier stage; at least one peak amplifier stage; an output combination bar configured to receive and combine an output from both the main amplifier stage and the or each peak amplifier stage; a main connection configured to connect an output of the main amplifier stage to the combination bar, the main connection comprising, at least in part, a bond wire forming a first inductance; a peak connection configured to connect an output of the peak amplifier stage to the combination bar; wherein the main connection connects to the combination bar at a first point along the bar and the peak connection connects to the combination bar at a second point along the bar spaced from the first point and the main amplifier stage is located further from the output combination bar than the at least one peak amplifier stage.
    Type: Application
    Filed: October 10, 2014
    Publication date: April 30, 2015
    Inventor: Jean-Jacques Bouny
  • Patent number: 9019015
    Abstract: The present disclosure provides a power amplifier comprising a main amplifier and an auxiliary amplifier. The power amplifier is configured to deliver an output power Pout. A First Efficiency Peak (FEP) is defined as a first efficiency peak in the power ratio Pout to Poutmax. Poutmax is a maximum power output of the power amplifier and PFEP defines a power ratio at the FEP. The main amplifier is configured to be biased by a main amplifier bias Vds,m that is substantially equal to an auxiliary amplifier bias Vds,a times xb with xb being a main amplifier output current in relation to the maximum current through the main amplifier when Pout equals PFEP. The impedances of a load and a main amplifier transmission line are arranged to be substantially equal. A corresponding method and a node in a wireless communication system comprising the power amplifier are also disclosed.
    Type: Grant
    Filed: May 5, 2011
    Date of Patent: April 28, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: David Gustafsson, Christian Fager
  • Patent number: 9019010
    Abstract: Combination circuitry includes a relatively small preamplifier and includes hybrid circuitry. The hybrid circuitry is configured to perform mode switching while also performing some amplification, thus allowing the relatively small preamplifier to be smaller than a conventional power amplifier. In one embodiment, the hybrid circuitry includes first series portion configured to amplify when ON, a first shunt portion, a second series portion configured to amplify when ON, and a second shunt portion. The first series portion may include: a first transistor; a first variable impedance in communication with a gate of the first transistor, wherein the first variable impedance is configured to receive a first transistor control signal; a second transistor in series with the first transistor; and a second variable impedance in communication with a gate of the second transistor, wherein second variable impedance is configured to receive a second transistor control signal.
    Type: Grant
    Filed: May 22, 2013
    Date of Patent: April 28, 2015
    Assignee: RF Micro Devices, Inc.
    Inventor: Julio Costa
  • Publication number: 20150109058
    Abstract: In one embodiment, a Doherty amplifier having a main amplifier branch and one or more peak amplifier branches, where at least one peak amplifier branch has RF conditioning applied to its peak branch input signal such that the peak amplifier branch is active only when the peak branch input signal is greater than a specified threshold level. In one implementation, a reverse-biased diode is configured between the peak branch input signal and a peak amplifier device, where the bias signal applied to the diode establishes the specified threshold level. Depending on the implementation, the bias signal may be static or dynamic, and multiple peak amplifier branches may have diodes with independently or dependently generated bias signals applied.
    Type: Application
    Filed: October 18, 2013
    Publication date: April 23, 2015
    Applicant: ALCATEL-LUCENT CANADA INC.
    Inventors: Brian Racey, Igor Acimovic
  • Publication number: 20150105033
    Abstract: Apparatus and methods for phase compensation in power amplifiers are disclosed herein. In certain implementations, a power amplifier includes an input stage, an output stage, an envelope tracker, and a compensation circuit. The input and output stages are cascaded and amplify an input RF signal to generate an amplified output RF signal. The envelope tracker generates a power amplifier supply voltage for at least the output stage based on an envelope of the input RF signal. The compensation circuit compensates for changes in input impedance of the output stage associated with changes in the voltage level of the power amplifier supply voltage. By including the compensation circuit, a variation in the power amplifier's phase delay versus input power can be reduced, thereby leading to an improvement in the power amplifier's phase distortion (AM/PM).
    Type: Application
    Filed: October 8, 2014
    Publication date: April 16, 2015
    Inventors: Hardik Bhupendra Modi, Sabah Khesbak, Guohao Zhang
  • Publication number: 20150102859
    Abstract: An amplifying apparatus includes a decomposer, two amplifiers, a combiner, and a controller. The decomposer decomposes an input signal into two signals having different phases. The two amplifiers amplify the decomposed two signals, respectively. The combiner combines output of the amplifiers. The controller controls at least one of waveform information of at least one of the two signals and an operating state of the two amplifiers such that an output characteristic of the combiner matches a desired characteristic.
    Type: Application
    Filed: September 10, 2014
    Publication date: April 16, 2015
    Inventors: TORU MANIWA, TOSHIO KAWASAKI, TOMONORI SATO, Shigekazu Kimura, NAOJI FUJINO
  • Patent number: 9007124
    Abstract: A system for power amplification is presented. A tile array power amplifier (PA) module for use in a phased array includes a module with a radio frequency (RF) side and a direct current (DC) side, a top edge, a left edge a bottom edge and a right edge. Four PA dies are mounted in each quadrature of the RF side of the module. RF input connectors are mounted on the RF side to bring RF inputs to the PA dies. RF output connectors are mounted to the DC side to output amplified signals from the PA dies. The PA dies are formed, in part, with gallium nitride (GaN) and are mounted to the module in such a way that the tile array PA module is able to generate about 100 watts of RF power and dissipate about 200 watts of heat while amplifying signals over 10 GHz.
    Type: Grant
    Filed: September 17, 2013
    Date of Patent: April 14, 2015
    Assignee: BAE Systems Information and Electronic Systems Integration Inc.
    Inventor: James J. Komiak
  • Patent number: 9007129
    Abstract: The disclosure relates to an amplifier device comprising an integrated circuit die (701a; 701b) having a first amplifier (702a; 702b) and a second amplifier. A Doherty amplifier may be implemented in accordance with the present invention. The amplifier device also comprises a first connector (706a; 706b) having a first end coupled to the first amplifier and a second end for coupling with a circuit board (718a; 718b), a second connector (708a; 708b) having a first end coupled to the second amplifier (704a; 704b) and a second end for coupling with a circuit board (718a; 718b), a shielding member (710a; 710b) having a first end coupled to the integrated circuit die (701a; 701b) and a second end for coupling with a circuit board (718a; 718b), the shielding member (710a; 710b) situated at least partially between the second connector and the first connector (706a; 706b) and a capacitor. The capacitor has a first plate and a second plate.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: April 14, 2015
    Assignee: NXP, B.V.
    Inventors: Albert Gerardus Wilhelmus Philipus van Zuijlen, Vittorio Cuoco, Josephus Henricus Bartholomeus van der Zanden
  • Patent number: 9007142
    Abstract: An output matching circuit for electronic amplifiers in the form of an integrated circuit is disclosed. The integrated circuit includes a first circuit, a second circuit, and a power sampling coupler. The first circuit is coupled to output of a first amplifier. The first circuit comprises a first matching section and an impedance inverter. The second circuit is coupled to output of a second amplifier, wherein the second circuit comprises a second matching section. The power sampling coupler is coupled to the first circuit and the second circuit, wherein the first circuit, the second circuit, and the power sampling coupler are fabricated as a single integrated circuit.
    Type: Grant
    Filed: July 13, 2012
    Date of Patent: April 14, 2015
    Assignee: Anadigics, Inc.
    Inventor: Kenneth Sean Ozard
  • Publication number: 20150097624
    Abstract: Methods and systems for reducing parasitic loading on a power supply output in RF amplifier arrangements used in multiband and/or multitude RF circuits are presented. Such RF circuits can comprise a plurality of RF amplifiers of which only one is activated for a given desired transmission mode and/or band.
    Type: Application
    Filed: October 8, 2013
    Publication date: April 9, 2015
    Applicant: Peregrine Semiconductor Corporation
    Inventors: Chris Olson, Dan William Nobbe, Jeffrey A. Dykstra
  • Publication number: 20150097623
    Abstract: A device includes an amplifier having a first path and a second path and a first variable attenuator connected to the first path. The device includes a controller coupled to the first variable attenuator. The controller is configured to determine a magnitude of an input signal to the amplifier. When the magnitude of the input signal is below a threshold, the controller is configured to set an attenuation of the first variable attenuator to a first attenuation value. When the magnitude of the input signal is above the threshold, the controller is configured to set the attenuation of the first variable attenuator to a second attenuation value. The second attenuation value is less than the first attenuation value.
    Type: Application
    Filed: October 3, 2013
    Publication date: April 9, 2015
    Applicant: FREESCALE SEMICONDUCTOR, INC.
    Inventors: Joseph Staudinger, Ramanujam Srinidhi Embar
  • Patent number: 9000842
    Abstract: An amplifying apparatus includes an amplifying unit that includes multiple amplifiers coupled in parallel; a measuring unit that measures in a predetermined period, frequency distribution of any one among instantaneous power and instantaneous voltage of a signal amplified by the amplifying unit; a calculating unit that calculates for multiple candidate values of a predetermined parameter of the amplifying unit, efficiency of amplification that is performed by the amplifying unit and based on the frequency distribution; and a controller that controls the predetermined parameter, based on the efficiency calculated for the candidate values by the calculating unit.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: April 7, 2015
    Assignee: Fujitsu Limited
    Inventors: Nobuhisa Aoki, Michiharu Nakamura
  • Publication number: 20150091651
    Abstract: Embodiments of a low-complexity and potentially physically small wideband impedance transformer that can be used in a combining network of a wideband Doherty amplifier are disclosed. In one embodiment, a wideband Doherty amplifier includes Doherty amplifier circuitry and a wideband combining network. The wideband combining network includes a wideband quarter-wave impedance transformer that includes a quarter-wave impedance transformer and compensation circuitry connected in parallel with the quarter-wave impedance transformer at a low-impedance end of the quarter-wave impedance transformer. The compensation circuitry is configured to reduce a total quality factor of the wideband quarter-wave impedance transformer as compared to a quality factor of the quarter-wave impedance transformer, which in turn increases a bandwidth of the wideband quarter-wave impedance transformer, and thus a bandwidth of the wideband Doherty amplifier.
    Type: Application
    Filed: December 2, 2013
    Publication date: April 2, 2015
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Sashieka Seneviratne, Igor Spokoinyi
  • Publication number: 20150091653
    Abstract: A reconfigurable load modulation amplifier having a carrier amplifier and a peak amplifier that are coupled in parallel is disclosed. The peak amplifier provides additional power amplification when the carrier amplifier is driven into saturation. A quadrature coupler coupled between the carrier amplifier and the peak amplifier is configured to combine power from both the carrier amplifier and the peak amplifier for output through an output load terminal. The reconfigurable load modulation amplifier further includes control circuitry coupled to an isolation port of the quadrature coupler and configured to provide adjustable impedance at the isolation port of the quadrature coupler. As such, impedance at the isolation port of the quadrature coupler is tunable such that at least a carrier or peak amplifier is presented with a quadrature coupler load impedance that ranges from around about half an output load termination impedance to around about twice the output load termination impedance.
    Type: Application
    Filed: September 30, 2014
    Publication date: April 2, 2015
    Inventors: Kevin Wesley Kobayashi, Hamhee Jeon
  • Publication number: 20150091652
    Abstract: A semiconductor device includes a power amplifier for amplifying RF signals in multiple frequency bands, an output matching circuit connected to an output of the power amplifier, a first capacitor connected at a first end to an output of the output matching circuit, multiple output paths, a switch connected to a second end of the first capacitor and directing each of the RF signals to a respective one of the output paths in accordance with frequency band of the each of the RF signals, and multiple second capacitors. Each second capacitor is connected in series to a respective one of the output paths. The switch and either the first capacitor or the second capacitors, or both the first and second capacitors, are integrated as a single monolithic microwave integrated circuit.
    Type: Application
    Filed: June 25, 2014
    Publication date: April 2, 2015
    Inventors: Kenichi Horiguchi, Masakazu Hirobe, Satoshi Miho, Yoshinobu Sasaki, Kazuya Yamamoto
  • Publication number: 20150084699
    Abstract: Radio frequency (RF) front-end circuitry that includes control circuitry and an RF filter structure that includes a plurality of resonators are disclosed. In one embodiment, a first tunable RF filter path is defined by a first set of the plurality of resonators such that the first tunable RF filter path has a first amplitude and a first phase. A second tunable RF filter path is defined by a second set of the plurality of resonators such that the second tunable RF filter path has a second amplitude and a second phase. To provide antenna diversity and/or beam forming/beam steering, the control circuitry is configured to set a first amplitude difference between the first amplitude and the second amplitude to approximately a first target amplitude difference and set a first phase difference between the first phase and the second phase to approximately a first target phase difference.
    Type: Application
    Filed: November 26, 2014
    Publication date: March 26, 2015
    Inventors: George Maxim, Dirk Robert Walter Leipold, Baker Scott
  • Publication number: 20150084502
    Abstract: A rapidly regulable high-voltage supply for the electrical focusing of an electron beam using a high-voltage final stage is provided. The high-voltage final stage includes a plurality of amplification elements that are interconnected in a series configuration with a first high-voltage connection, and a potential dividing chain including a series of potential dividing elements. The potential dividing chain is interconnected with the first high-voltage connection and has a signal interconnection with the plurality of amplification elements, so that when a voltage is applied across the potential dividing chain, a difference in voltages between a signal input to any amplification element of the plurality of amplification elements and a signal input to a next amplification element of the plurality of amplification elements has a same sign.
    Type: Application
    Filed: September 23, 2014
    Publication date: March 26, 2015
    Inventors: Josef Deuringer, J├╝rgen Oelschlegel
  • Patent number: 8988147
    Abstract: The present disclosure provides a multi-way Doherty amplifier that includes an amplifier input, an amplifier output, a main amplifier having an input connected to the amplifier input, and at least a first and a second peak amplifier. In the Doherty amplifier, an input of the first peak amplifier is connected to the amplifier input or an output of the main amplifier, and an input of the second peak amplifier is connected to the amplifier input, the output of the main amplifier or an output of the first peak amplifier. The Doherty amplifier further comprises a first impedance converter connected between the output of the main amplifier and the amplifier output, a second impedance converter connected between the output of the first peak amplifier and an output of the second peak amplifier, and a third impedance converter connected between the output of the second peak amplifier and the amplifier output.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: March 24, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventor: Linsheng Liu
  • Patent number: 8988148
    Abstract: A transconductance amplifier has a pair of input terminals and a pair of output terminals. A first pair of transconductors is connected to the input terminals and the output terminals. A second pair of transconductors has inputs connected to output terminals, and outputs connected to the opposing output terminals. A third pair of transconductors has both its inputs and its outputs connected to the output terminals. One or more of the transconductors have a control port for a control signal to adjust its transconductance. The control signal may switch the transconductance of this or these transconductors between two or more values. One or more of the transconductors in the transconductance amplifier may include a tri-state inverter, which may be enabled or disabled through a control port.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: March 24, 2015
    Inventors: Julian Jenkins, Torsten Lehmann, James Paul Koeppe
  • Publication number: 20150077186
    Abstract: A radio frequency (RF) power amplifier (PA) is reconfigured to operate in a low power mode from a high power mode. The RF PA has a first RF amplifier is connected to the first and second inputs of a first transformation network. The RF PA has a second a second RF amplifier connected to a second transformation network. During high power mode, both RF amplifiers drive a load coupled to the transformation networks. In low power mode the first RF amplifier is disabled and the first and second inputs of the first transformation are coupled together so as to change the load impedance seen by the second RF amplifier. The second RF amplifier continues to supply power to the load during operation in the low power mode.
    Type: Application
    Filed: July 7, 2014
    Publication date: March 19, 2015
    Inventors: Susanne A. Paul, Marius Goldenberg
  • Patent number: 8981850
    Abstract: A method and system for designing and implementing a reconfigurable Doherty amplifier system are disclosed. In one embodiment, a design method includes determining, using a processor, a first set of ABCD transmission parameters of a first output compensation network in a main path of a Doherty amplifier for the case where an auxiliary amplifier of the Doherty amplifier is off. The method further includes determining, using a processor, a second set of ABCD transmission parameters of a second output compensation network in an auxiliary path of the Doherty amplifier based on the first set of ABCD transmission parameters.
    Type: Grant
    Filed: January 25, 2013
    Date of Patent: March 17, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Slim Boumaiza, Ahmed Mohamed Mahmoud Mohamed
  • Publication number: 20150070094
    Abstract: A method and system for design and implementation of symmetric and asymmetric Doherty power amplifiers are disclosed. Quarter wave transmission lines are interposed between the main and peak power amplifiers of a Doherty power amplifier system and a 3 dB hybrid coupler. The impedances of the quarter wavelength transmission lines are chosen based on a ratio of the power ratings of the main and peak power amplifiers such that the impedances seen by the main and peak power amplifiers is independent of the impedance of the 3 dB coupler.
    Type: Application
    Filed: September 10, 2013
    Publication date: March 12, 2015
    Applicant: Telefonaktiebolaget LM Ericsson (Publ)
    Inventor: Bi Pham
  • Patent number: 8977216
    Abstract: A wireless device is described. The wireless device includes a tunable front end module. The tunable front end module includes a Tx microelectromechanical system bandpass filter. The tunable front end module also includes a first Rx microelectromechanical system bandpass filter. The wireless device also includes a power amplifier. The wireless device further includes a low noise amplifier.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: March 10, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Haim M. Weissman, Avigdor Brillant, David Pezo
  • Patent number: 8975966
    Abstract: A receiver is described. The receiver includes a first amplifier on an integrated circuit. The receiver also includes a second amplifier on the integrated circuit. The receiver further includes a first inductor coupled to the first amplifier. The receiver also includes a second inductor coupled to the second amplifier. The receiver further includes a first capacitor coupled to the first inductor, the second inductor, and to ground. The first capacitor is shared between a first matching network for the first amplifier and a second matching network for the second amplifier.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: March 10, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Prasad Srinivasa Siva Gudem, Ojas M. Choksi
  • Patent number: 8975955
    Abstract: An analysis technique for (Doherty) amplifiers having a main amplifier branch and at least one peak amplifier branch. For a given input power level and assumed amplifier impedance levels, an output power level and phase response are obtained for each active device using appropriate load-pull data based on the impedance levels. The performance of the amplifier is analyzed based on the impedance levels, output power levels, and phase responses to generate updated impedance levels. The analysis is repeated until the updated impedance levels converge on steady state values. The analysis can be repeated for different input power levels. Main and peak output matching networks for the amplifier can be designed by iteratively adjusting impedance levels for the networks using appropriate load-pull contours. For the design and analysis phases, the load-pull contours include Class-AB data for the main amplifier device and Class-C data for the peak amplifier device.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: March 10, 2015
    Assignee: Alcatel Lucent
    Inventors: Igor Acimovic, Brian Racey
  • Publication number: 20150061775
    Abstract: A Doherty amplifier is disclosed, being adapted to receive an RF input signal and to output an RF output signal and comprising a main amplifier and a peak amplifier, each comprising: a first amplifier (T1, T1?) and a second amplifier (T2, T2?), each amplifier having a respective input terminal and a respective output terminal, the first amplifier and the second amplifier being adapted to amplify a respective input signal derived from the RF input signal and received at the respective input terminal and to deliver a first output signal and a second output signal, respectively; a first phase shifter (14, 14?) and a second phase shifter (15, 15?) coupled to the output terminal of the first amplifier and to the output terminal of the second amplifier, respectively; a third phase shifter (16, 16?); and a fourth phase shifter (17, 17?); wherein the Doherty amplifier further comprises a first combining node (A) and a second combining node (B) and, wherein each third phase shifter is coupled between the respective fi
    Type: Application
    Filed: July 28, 2014
    Publication date: March 5, 2015
    Inventor: Jawad Hussain Qureshi
  • Patent number: 8963632
    Abstract: A high-frequency power amplifier comprises a broadband amplifier (30), a Doherty extension (31) and a coupling device (33). In this context, the broadband amplifier (30) provides a power splitter (34), a main amplifier path (64) and an auxiliary amplifier path (65). The Doherty extension (32) provides a first offset line (60), a second offset line (61) and an impedance inverter (62). The broadband amplifier (30) amplifies an input signal and supplies the amplified signal to the Doherty extension (31) or to the coupling device (33).
    Type: Grant
    Filed: August 3, 2011
    Date of Patent: February 24, 2015
    Assignee: Rohde & Schwarz GmbH & Co. KG
    Inventor: Lothar Schenk
  • Publication number: 20150048887
    Abstract: An amplifier circuit is configured in such a manner that the withstand voltage between the terminals of a FET 2 (withstand voltage B) is higher than the withstand voltage between the terminals of a FET 1 (withstand voltage A), and that the gate width of the FET 1 (Wg1) is narrower than the gate width of the FET 2 (Wg2). This makes it possible to increase the gain while maintaining high output power. The narrow gate width of the FET 1 (Wg1) connected to an input terminal 3 enables reducing the size of the cascode amplifier.
    Type: Application
    Filed: March 12, 2013
    Publication date: February 19, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Naoko Nitta, Katsuya Kato, Kenji Mukai, Kenichi Horiguchi, Morishige Hieda, Kazutomi Mori, Kazuya Yamamoto
  • Patent number: 8957734
    Abstract: A system and method of calibrating an amplifier are presented. The amplifier has a first amplification path and a second amplification path. A first state of the amplifier is identified defining a first phase shift of the first path and a second phase shift of the second path resulting in a maximum efficiency of the amplifier when an attenuation of the first path and an attenuation of the second path are set to first attenuation values. The attenuation of the first path and the attenuation of the second path is set to achieve a maximum efficiency of the amplifier when the phase shift of the first path and the phase shift of the second path are set according to the first state.
    Type: Grant
    Filed: August 20, 2014
    Date of Patent: February 17, 2015
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Abdulrhman M. S. Ahmed, Paul R. Hart, Ramanujam Shinidhi Embar
  • Patent number: 8957733
    Abstract: In accordance with an embodiment of the disclosure, systems and methods are provided for multi-modal power amplification. In certain implementations, an adjustable power amplifier amplifies an input signal, and the amount of amplification is varied based on the input signal. A variable impedance unit receives an amplified input signal, and the amount of load impedance at the variable impedance unit is varied based on the input signal.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: February 17, 2015
    Assignee: Marvell World Trade Ltd.
    Inventors: David M. Signoff, Shu-Hsien Liao, Ming He, Wayne A. Loeb
  • Patent number: 8952758
    Abstract: A device includes a Doherty amplifier having a main path and a peaking path. The Doherty amplifier includes a main amplifier configured to amplify a signal received from the main path and a peaking amplifier configured to amplify a signal received from the peaking path when the signal received from the peaking path exceeds a predetermined threshold. The device includes a first driver amplifier connected to the main path of the Doherty amplifier. The first driver amplifier is configured to exhibit an amplitude and phase distortion characteristic that is an inverse of an amplitude and phase distortion characteristic of the main amplifier. The device includes a second driver amplifier connected to the peaking path of the Doherty amplifier. The second driver amplifier is configured to exhibit an amplitude and phase distortion characteristic that is an inverse of an amplitude and phase distortion characteristic of the peaking amplifier.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: February 10, 2015
    Assignee: Freescale Semiconductor, Inc.
    Inventors: Srinidhi R. Embar, Abdulrhman M. S Ahmed, Joseph Staudinger
  • Publication number: 20150035604
    Abstract: The embodiments described herein can provide improved signal feeding between hybrid couplers and associated transistors. As such, these embodiments can improve the performance of amplifiers and other such RF devices that utilize these components. In one embodiment a device includes a distribution network and a compensation resonator. The distribution network is configured to output a signal through a relatively wide output feedline. This relatively wide output feedline provides distributed signal feeding that can improve signal distribution and performance. The output feedline is coupled to the compensation resonator. In general, the compensation resonator is configured to resonate with the distribution network at the frequency band of the signal. Thus, the distribution network and compensation resonator together can provide improved signal distribution while maintaining performance at the frequencies of interest.
    Type: Application
    Filed: August 1, 2013
    Publication date: February 5, 2015
    Applicant: Freescale Semiconductor, Inc.
    Inventors: Damon G. HOLMES, Jeffrey K. JONES, Joseph STAUDINGER, Michael E. WATTS
  • Publication number: 20150035599
    Abstract: A system comprises a power amplifier configured to amplify an input signal, a splitter configured to split the amplified input signal into a plurality of output signals, a plurality of filters configured to filter the plurality of output signals, respectively, to produce a plurality of filtered output signals, and a combiner configured to combine the filtered output signals to produce a combined output signal.
    Type: Application
    Filed: July 30, 2013
    Publication date: February 5, 2015
    Applicant: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Yut Hoong CHOW, Wen Hue CHIOK, Ray Kooi Tatt CHUAH
  • Patent number: 8948306
    Abstract: Systems and methods are provided for generating a modulated radio frequency (RF) output signal representing a baseband input signal. A digitizer is configured to sample the baseband input signal and produce an N-bit binary digital signal representing a scaled linear function of the signal amplitude. An RF signal source configured to produce an RF carrier signal. N amplifier paths each include at least one amplifier configured to receive the RF carrier signal as an input and provide a corresponding output RF signal. The amplifiers associated with each of the N amplifier paths are active only when a corresponding bit of the digital signal assumes a first value. A power combiner assembly is configured to combine the outputs of the plurality of amplifier paths to deliver the modulated RF output signal.
    Type: Grant
    Filed: January 11, 2013
    Date of Patent: February 3, 2015
    Assignee: Gatesair, Inc.
    Inventors: Dmitri Borodulin, George Cabrera
  • Patent number: 8947125
    Abstract: A comparator circuit comprising an operational amplifier configured to compare a difference between a switching voltage and a reference voltage, and a dynamically adjustable bias current generator coupled to the operational amplifier. A method of conserving power in a comparator circuit includes estimating a switching regulator load current value, communicating the value to a current bias generator, enabling the bias generator with a signal from a switching regulator PFM logic circuit, and establishing a bias current at an operational amplifier of the comparator circuit on the basis of the enabling.
    Type: Grant
    Filed: February 21, 2013
    Date of Patent: February 3, 2015
    Assignee: QUALCOMM Incorporated
    Inventor: Vijayakumar Dhanasekaran
  • Patent number: 8948237
    Abstract: An apparatus and method is disclosed to compensate for one or more offsets in a communications signal. A communications receiver may carry out an offset adjustment algorithm to compensate for the one or more offsets. An initial search procedure determines one or more signal metric maps for one or more selected offset adjustment corrections from the one or more offset adjustment corrections. The offset adjustment algorithm determines one or more optimal points for one or more selected offset adjustment correction based upon the one or more signal maps. The adaptive offset algorithm adjusts each of the one or more selected offset adjustment corrections to their respective optimal points and/or each of one or more non-selected offset adjustment corrections to a corresponding one of a plurality of possible offset corrections to provide one or more adjusted offset adjustment corrections. A tracking mode procedure optimizes the one or more adjusted offset adjustment corrections.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: February 3, 2015
    Assignee: Broadcom Corporation
    Inventors: Namik Kemal Kocaman, Afshin Momtaz, Velu Chellam Pillai, Vivek Telang, Sundararajan Chidambara, Magesh Valliappan
  • Patent number: 8947165
    Abstract: The present invention relates to a Doherty power amplifier in which a new operation mode for accomplishing high efficiency at a lower output power level is added to operation of a conventional Doherty power amplifier, thereby achieving high efficiency at various output power levels of the power amplifier. The multi-mode Doherty power amplifier to which a second power mode is added may be reduced in size so as to be integrated into a chip.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: February 3, 2015
    Assignee: Postech Academy-Industry Foundation
    Inventors: Yun Sung Cho, Bum Man Kim, Dae Hyun Kang
  • Publication number: 20150022270
    Abstract: An amplifying structure includes a main amplifier configured to amplify a first signal; and a peak amplifier configured to amplify a second signal, each of the main amplifier and the peak amplifier including, respectively, a hybrid power device, the hybrid power device including, a first power transistor die configured to amplify signals of a first frequency, and a second power transistor die configured to amplify signals of a second frequency different than the first frequency.
    Type: Application
    Filed: July 19, 2013
    Publication date: January 22, 2015
    Applicant: Alcatel-Lucent Canada Inc.
    Inventor: Noureddine OUTALEB
  • Patent number: 8937509
    Abstract: A multi-channel biopotential signal acquisition system is disclosed. In the system, a plurality of biopotential channels is corrected for common-mode interference. In one aspect, each biopotential channel includes an electrode for providing a biopotential input signal and an associated amplifier for amplifying the biopotential input signal and providing a biopotential output signal. The output signal is processed in a processor. Each biopotential output signal is passed to a common-mode feedback system, which determines an average common-mode signal and feeds that signal back to each of the amplifiers in each of the biopotential channels to enhance common-mode rejection ratio of the system.
    Type: Grant
    Filed: September 7, 2011
    Date of Patent: January 20, 2015
    Assignees: IMEC, Stichting IMEC Nederland
    Inventors: Jiawei Xu, Refet Firat Yazicioglu