Patents Examined by Hafizur Rahman
  • Patent number: 11228301
    Abstract: Provided is a multiplexer that includes a first filter (first transmission filter), a second filter (second reception filter), a third filter (third reception filter), a first inductor, and a second inductor. The first inductor is connected in series with one parallel arm resonator (second parallel arm resonator) of the first filter between the one parallel arm resonator and ground. The second inductor is connected in series with another parallel arm resonator (third parallel arm resonator) of the first filter between the other parallel arm resonator and ground. The first inductor and the second inductor have the same winding direction as each other from the first filter side toward the ground side thereof.
    Type: Grant
    Filed: March 12, 2020
    Date of Patent: January 18, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kazuhiro Ikarashi, Hiroyuki Nagamori
  • Patent number: 11224120
    Abstract: Provided is a print circuit board including: a ground conductor layer; a pair of strip conductors extending along a first orientation; a first resonator conductor three-dimensionally intersecting with the pair of strip conductors along a second orientation; a pair of first via holes connecting the first resonator conductor and the ground conductor layer; and a dielectric layer including the first resonator conductor therein, and being disposed between the ground conductor layer and the pair of the strip conductors. A distance H1 between the pair of strip conductors and the ground conductor layer is twice or more a distance H2 between the pair of strip conductors and the first resonator conductor, and a line length L of the first resonator conductor is 0.4 wavelength or more and 0.6 wavelength or less at a frequency corresponding to the bit rate.
    Type: Grant
    Filed: February 20, 2020
    Date of Patent: January 11, 2022
    Assignee: Lumentum Japan, Inc.
    Inventors: Osamu Kagaya, Koyu Takahashi, Yoshikuni Uchida
  • Patent number: 11223333
    Abstract: Provided is an amplification circuit for amplifying an input signal. The amplification circuit includes an input stage including an input matching circuit that receives the input signal and an input attenuation circuit that attenuates a gain for the input signal outside an operating frequency band of the amplification circuit, a transistor that amplifies the input signal provided from the input stage, and an output stage including an output matching circuit that receives a signal amplified by the transistor and an output attenuation circuit that attenuates the gain for the input signal outside the operating frequency band of the amplification circuit, and the input attenuation circuit includes a first resistor and a second resistor that are connected to a ground voltage, a first passive element connected between the input matching circuit and the second resistor, and a second passive element connected between the first passive element and the first resistor.
    Type: Grant
    Filed: July 29, 2020
    Date of Patent: January 11, 2022
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Woojin Chang, Seong-Il Kim, Sang-Heung Lee, Jongmin Lee
  • Patent number: 11211899
    Abstract: A power amplifying circuit includes a bias circuit that supplies a bias current or a bias voltage to a base of a first transistor, and at least one termination circuit that short-circuits a second-order harmonic of an amplified signal output from a collector of the first transistor to a ground voltage. An emitter of the first transistor is connected to ground. The bias circuit includes a second transistor. A collector of the second transistor is connected to the base of the first transistor. An emitter of the second transistor is connected to the emitter of the first transistor. A base of the second transistor is supplied with a predetermined voltage.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: December 28, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Hideyuki Satou
  • Patent number: 11206011
    Abstract: A filter includes a signal path connecting an input terminal and an output terminal one or more series arm circuits on the signal path, and one or more parallel arm circuits connected to one or more nodes disposed on the signal path and a ground electrode. The one or more series arm circuits define any of a section between nodes adjacent to each other, a section between a node closest to the input terminal and the input terminal, and a section between a node closest to the output terminal and the output terminal. Among the one or more series arm circuits and the one or more parallel arm circuits, one circuit does not include any acoustic wave resonator, and another circuit includes an acoustic wave resonator.
    Type: Grant
    Filed: August 9, 2019
    Date of Patent: December 21, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Hidetaro Nakazawa, Tetsuro Okuda
  • Patent number: 11206010
    Abstract: A radio frequency module includes a switch circuit that includes selection terminals, a filter that allows the signal in the first frequency band to pass therethrough, a filter that allows the signal in the second frequency band to pass therethrough, a phase adjustment circuit that is connected to the selection terminal and the filter, and a phase adjustment circuit that is connected to the selection terminal and the filter. The filter includes an acoustic wave resonator that is formed on a substrate that has piezoelectricity. The filter includes an acoustic wave resonator that is formed on a substrate that has piezoelectricity. At least one of circuit elements that are included in the phase adjustment circuit is formed on the substrate. At least one of circuit elements that are included in the phase adjustment circuit is formed on the substrate.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: December 21, 2021
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Daisuke Miyazaki
  • Patent number: 11201593
    Abstract: A Doherty amplifier system is disclosed with a carrier amplifier configured to amplify a first portion of a radio frequency (RF) signal. A peaking amplifier with a peaking output is configured to amplify a second portion of the RF signal when it is above a power level threshold. A first inductor is coupled between the main output and a first middle node, and a second inductor is coupled between the first middle node and the peaking output. The first inductor and the second inductor are configured to have a first magnetic coupling to form a first impedance inverter. A third inductor is coupled between the peaking output and a second middle node, and a fourth inductor is coupled between the second middle node and an RF signal output. The third inductor and the fourth inductor are configured to have a second magnetic coupling to form a second impedance inverter.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: December 14, 2021
    Assignee: Qorvo US, Inc.
    Inventor: Nadim Khlat
  • Patent number: 11201590
    Abstract: A power amplifier apparatus is provided. The power amplifier apparatus includes a number of multi-stage power amplifiers and a bias circuit configured to generate a number of bias signals (e.g., bias current or bias voltage) to control (e.g., activate or deactivate) the multi-stage power amplifiers. In examples disclosed herein, only one of the multi-stage power amplifiers is activated at a given time. In this regard, the bias circuit can generate the bias signals to collectively activate one of the multi-stage power amplifiers, while deactivating the rest of the multi-stage power amplifiers. As such, it may be possible to control a larger number of power amplifier stages based on a smaller number of bias signals. As a result, it may be possible to eliminate a biasing bump pad(s) from the power amplifier apparatus, thus helping to reduce the footprint and cost of the power amplifier apparatus.
    Type: Grant
    Filed: February 12, 2020
    Date of Patent: December 14, 2021
    Assignee: Qorvo US, Inc.
    Inventors: Michael Nielsen, Lars Sandahl Ubbesen
  • Patent number: 11201596
    Abstract: A power amplifier system which operates at a narrow band with high power and high efficiency or at a wide band is provided. Said power amplifier system comprises at least one high power amplifier; at least one connection line; at least one input block which receives at least one signal from an input, which is connected to said high power amplifier and connection line, which sends received signal to either high power amplifier or connection line and which amplifies the power of the signal sent to the connection line; and at least one high power asymmetric output switch, which is connected to said high power amplifier and connection line and which sends signals coming from said high power amplifier and connection line to an output.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: December 14, 2021
    Assignee: ASELSAN ELEKTRONIK SANAYI VE TICARET ANONIM SIRKETI
    Inventors: Ahmet Aktug, Ahmet Degirmenci
  • Patent number: 11196398
    Abstract: A system having a set of power amplifiers each having a primary inductive structure configured to provide an output signal. A secondary inductive structure is configured to inductively couple to each of the primary inductive structures. A transmission line is provided with a signal trace and a ground trace. The signal trace of the transmission line is connected to a first end of the secondary inductive structure. A return path from a second end of the secondary inductive structure is coupled via a resonant network to the ground trace of the transmission line, in which the return path is spaced away from the secondary inductive structure to minimize inductive coupling to the primary structures.
    Type: Grant
    Filed: February 5, 2020
    Date of Patent: December 7, 2021
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Krishnanshu Dandu, Brian Paul Ginsburg
  • Patent number: 11196384
    Abstract: An example object of the present invention is to provide a power amplifier with better conversion efficiency. The power amplifier including a power amplifier circuit that includes: a first switching element; a second switching element; a first capacitor; and a second capacitor. The first switching element is controlled by a first PWM signal generated from an input signal. The second switching element is controlled by a second PWM signal in a reverse phase to the first PWM signal. The first capacitor is a capacitor connected in parallel to the first switching element. The second capacitor is a capacitor connected in parallel to the second switching element.
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: December 7, 2021
    Assignee: NEC CORPORATION
    Inventor: Takashi Noda
  • Patent number: 11190146
    Abstract: Doherty power amplifier (PA) devices (e.g., packages and modules) including integrated output combining networks are disclosed. In embodiments, the Doherty PA device includes a first amplifier die having a first transistor with a first output terminal at which a first amplified signal is generated, a second amplifier die having a second transistor with a second output terminal at which a second amplified signal is generated, and an output combining network. The output combining network includes, in turn, a combining node integrally formed with the second amplifier die and electrically coupled to the second output terminal. At least one die-to-die bond wire electrically couples the first output terminal to the combining node. The at least one die-to-die bond wire has an electrical length, which is results in a 90 degree phase shift imparted to the first amplified signal between the first output terminal and the combining node.
    Type: Grant
    Filed: January 8, 2020
    Date of Patent: November 30, 2021
    Assignee: NXP USA, Inc.
    Inventors: Ramanujam Srinidhi Embar, Ebrahim M. Al Seragi, Anthony Lamy, Ricardo Uscola, Damon G. Holmes
  • Patent number: 11190140
    Abstract: A wide voltage trans-impedance amplifier includes a first P-channel metal oxide semiconductor (PMOS) transistor PM1, a second PMOS transistor PM2, a third PMOS transistor PM3, a fourth PMOS transistor PM4, a fifth PMOS transistor PM5, a first bias voltage VB1, a second bias voltage VB2, a third bias voltage VB3, a first N-channel metal oxide semiconductor (NMOS) transistor NM1, and a second NMOS transistor NM2. A common-gate amplifier detects a change of an input voltage, and a negative feedback is constructed by injecting a current into a current mirror to achieve a low input impedance. The trans-impedance amplifier uses a common-gate amplifier to monitor an input voltage and uses a current mirror to perform the transconductance enhancement on an input transistor, while ensuring a relatively high loop gain.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: November 30, 2021
    Assignee: SOUTHEAST UNIVERSITY
    Inventors: Chao Chen, Jun Yang, Xinning Liu
  • Patent number: 11190143
    Abstract: Apparatus and methods for a no-load-modulation power amplifier are described. No-load-modulation power amplifiers can comprise multiple amplifiers connected in parallel to amplify a signal that has been divided into parallel circuit branches. One of the amplifiers can operate as a main amplifier in a first amplification class and the remaining amplifiers can operate as peaking amplifiers in a second amplification class. The main amplifier can see essentially no modulation of its load between the power amplifier's fully-on and fully backed-off states. The power amplifiers can operate in symmetric and asymmetric modes. Improvements in bandwidth and drain efficiency over conventional Doherty amplifiers are obtained. Further improvements can be obtained by combining signals from the amplifiers with hybrid couplers.
    Type: Grant
    Filed: August 14, 2018
    Date of Patent: November 30, 2021
    Assignee: MACOM TECHNOLOGY SOLUTIONS HOLDINGS, INC.
    Inventors: Bi Ngoc Pham, Gerard Bouisse
  • Patent number: 11190153
    Abstract: A packaged RF power amplifier (RFPA) configured to increase video bandwidth is disclosed as well is a process for implementing a RF power device to increase video bandwidth. The RF power device including at least one transistor; an output matching circuit coupled to an output lead and to the at least one transistor; at least one bias feed circuit coupled to the at least one transistor; and at least one coaxial resonator coupled between the at least one transistor and the at least one bias feed circuit.
    Type: Grant
    Filed: February 6, 2020
    Date of Patent: November 30, 2021
    Assignee: WOLF SPEED, INC.
    Inventor: David Michael Rice
  • Patent number: 11184050
    Abstract: Aspects of the subject disclosure may include, for example, a system for transmitting signals by first electromagnetic waves guided by a first transmission medium, and, responsive to a determination of an undesired condition, adjusting the first electromagnetic waves to cause cross-medium coupling between the first transmission medium and a second transmission medium resulting in the signals being transmitted by second electromagnetic waves guided by the second transmission medium. Other embodiments are disclosed.
    Type: Grant
    Filed: January 2, 2020
    Date of Patent: November 23, 2021
    Assignee: AT&T Intellectual Property I, L.P.
    Inventors: Donald J. Barnickel, Paul Shala Henry, Irwin Gerszberg, Farhad Barzegar, Thomas M. Willis, III, Robert Bennett
  • Patent number: 11183972
    Abstract: An electronic device is provided. The electronic device includes an antenna, an amplification circuit configured to amplify a signal to be transmitted through the antenna, a first sensing circuit configured to sense first information corresponding to a voltage value of power supplied to the amplification circuit, a second sensing circuit configured to sense second information corresponding to a current value of the power, and a protective circuit. The protective circuit may be configured to summate the first information and the second information into a single parameter, to determine whether a summation value corresponding to the single parameter deviates from an operating area determined by characteristics of the amplification circuit, and to adjust an output of the amplification circuit if the summation value deviates from the operating area.
    Type: Grant
    Filed: December 11, 2019
    Date of Patent: November 23, 2021
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hyunseok Choi, Dongil Yang, Youngju Kim, Jooseung Kim, Sanghun Sim, Youngmin Lee
  • Patent number: 11177781
    Abstract: Disclosed in the present invention are a radio frequency power amplifier based on current detection feedback and a chip. The radio frequency power amplifier comprises multiple stages of amplifier circuits and at least one current detection feedback circuit; the input end of the current detection feedback circuit is connected to the input end of a current stage of amplifier circuit among the multiple stages of amplifier circuits by means of a corresponding resistor, and the output end of the current detection feedback circuit is connected to the input end of at least one stage of amplifier circuit prior to the current stage of amplifier circuit. The current detection feedback circuit generates, according to the detected quiescent operating current of the current stage of amplifier circuit, a control voltage varying inversely with the quiescent operating current, so that the current detection feedback circuit outputs current varying positively with the control voltage.
    Type: Grant
    Filed: June 30, 2018
    Date of Patent: November 16, 2021
    Assignee: VANCHIP (TIANJIN) TECHNOLOGY CO., LTD.
    Inventors: Jinxin Zhao, Yunfang Bai
  • Patent number: 11171610
    Abstract: A transformer-based Doherty power amplifier includes a main power amplifier path and an auxiliary power amplifier path which are connected in parallel. The main power amplifier path includes a main power amplifier, and the auxiliary power amplifier path includes an auxiliary power amplifier. The transformer-based Doherty power amplifier further includes a first linear network circuit or a second linear network circuit. The first linear network circuit is arranged at an input of the main power amplifier and is used to compensate for variations of an input capacitance of the main power amplifier, so as to improve the linearity of the main power amplifier. The second linear network circuit is arranged at an input of the auxiliary power amplifier and is used to compensate for variations of an input capacitance of the auxiliary power amplifier, so as to improve the linearity of the auxiliary power amplifier.
    Type: Grant
    Filed: December 31, 2019
    Date of Patent: November 9, 2021
    Assignee: Shanghai Huahong Grace Semiconductor Manufacturing Corporation
    Inventors: Jiangchuan Ren, Ruofan Dai
  • Patent number: 11165407
    Abstract: Resonator devices, filter devices, and methods of fabrication are disclosed. A resonator device includes a substrate and a single-crystal piezoelectric plate having parallel front and back surfaces. An acoustic Bragg reflector is sandwiched between a surface of the substrate and the back surface of the single-crystal piezoelectric plate. An interdigital transducer (IDT) is formed on the front surface. The IDT and the single-crystal piezoelectric plate are configured such that a radio frequency signal applied to the IDT excites a shear primary acoustic mode within the single-crystal piezoelectric plate. The acoustic Bragg reflector is configured to reflect the primary shear acoustic mode over a frequency range including a resonance frequency and an anti-resonance frequency of the acoustic resonator device.
    Type: Grant
    Filed: January 31, 2020
    Date of Patent: November 2, 2021
    Assignee: Resonant Inc.
    Inventors: Ventsislav Yantchev, Bryant Garcia, Viktor Plesski, Soumya Yandrapalli, Robert B. Hammond, Patrick Turner, Jesson John