Patents by Inventor Norio Hayashi

Norio Hayashi 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: 11784609
    Abstract: A power amplifier circuit includes an amplifier that receives an input signal with an alternating current and outputs an output signal obtained by amplifying power of the input signal to a first node; an inductive element that is connected between the first node and a second node; and a variable capacitor that is connected between the second node and a reference potential, and whose electrostatic capacitance increases as power of the output signal increases.
    Type: Grant
    Filed: June 10, 2020
    Date of Patent: October 10, 2023
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Satoshi Tanaka, Masatoshi Hase, Norio Hayashi, Kazuo Watanabe, Yuuri Honda
  • Patent number: 11515840
    Abstract: The present disclosure is to improve the power added efficiency of a power amplifier at high output power. The power amplifier includes: a first capacitor with a radio frequency signal input to one end thereof; a first transistor whose base is connected to the other end of the first capacitor to amplify the radio frequency signal; a bias circuit for supplying bias to the base of the first transistor; and a second capacitor with one end connected to the base of the first transistor and the other end connected to the emitter of the first transistor.
    Type: Grant
    Filed: June 9, 2020
    Date of Patent: November 29, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kazuo Watanabe, Satoshi Tanaka, Norio Hayashi, Kazuma Sugiura
  • Patent number: 11387796
    Abstract: A power amplifier circuit includes a lower-stage transistor having a first power supply voltage supplied to a first terminal, a second terminal connected to ground, and a first signal supplied to a third terminal; an upper-stage transistor having a second power supply voltage supplied to a first terminal, a second signal obtained by amplifying the first signal being output from the first terminal, a second terminal connected to the first terminal of the lower-stage transistor via a first capacitor, and a third terminal connected to ground via a ground path; an inductor that connects the second terminal of the upper-stage transistor to ground; and an adjustment circuit that adjusts impedance seen from the third terminal of the upper-stage transistor. The adjustment circuit includes a second capacitor and at least one resistance element connected in series with the ground path between the third terminal of the upper-stage transistor and ground.
    Type: Grant
    Filed: December 10, 2019
    Date of Patent: July 12, 2022
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Satoshi Tanaka, Kazuo Watanabe, Norio Hayashi, Makoto Itou
  • Publication number: 20200304070
    Abstract: The present disclosure is to improve the power added efficiency of a power amplifier at high output power. The power amplifier includes: a first capacitor with a radio frequency signal input to one end thereof; a first transistor whose base is connected to the other end of the first capacitor to amplify the radio frequency signal; a bias circuit for supplying bias to the base of the first transistor; and a second capacitor with one end connected to the base of the first transistor and the other end connected to the emitter of the first transistor.
    Type: Application
    Filed: June 9, 2020
    Publication date: September 24, 2020
    Inventors: Kazuo Watanabe, Satoshi Tanaka, Norio Hayashi, Kazuma Sugiura
  • Publication number: 20200304071
    Abstract: A power amplifier circuit includes an amplifier that receives an input signal with an alternating current and outputs an output signal obtained by amplifying power of the input signal to a first node; an inductive element that is connected between the first node and a second node; and a variable capacitor that is connected between the second node and a reference potential, and whose electrostatic capacitance increases as power of the output signal increases.
    Type: Application
    Filed: June 10, 2020
    Publication date: September 24, 2020
    Inventors: Satoshi Tanaka, Masatoshi HASE, Norio HAYASHI, Kazuo WATANABE, Yuuri HONDA
  • Patent number: 10715084
    Abstract: A power amplifier circuit includes an amplifier that receives an input signal with an alternating current and outputs an output signal obtained by amplifying power of the input signal to a first node; an inductive element that is connected between the first node and a second node; and a variable capacitor that is connected between the second node and a reference potential, and whose electrostatic capacitance increases as power of the output signal increases.
    Type: Grant
    Filed: September 20, 2018
    Date of Patent: July 14, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Satoshi Tanaka, Masatoshi Hase, Norio Hayashi, Kazuo Watanabe, Yuuri Honda
  • Patent number: 10693418
    Abstract: The present disclosure is to improve the power added efficiency of a power amplifier at high output power. The power amplifier includes: a first capacitor with a radio frequency signal input to one end thereof; a first transistor whose base is connected to the other end of the first capacitor to amplify the radio frequency signal; a bias circuit for supplying bias to the base of the first transistor; and a second capacitor with one end connected to the base of the first transistor and the other end connected to the emitter of the first transistor.
    Type: Grant
    Filed: May 3, 2017
    Date of Patent: June 23, 2020
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kazuo Watanabe, Satoshi Tanaka, Norio Hayashi, Kazuma Sugiura
  • Publication number: 20200195210
    Abstract: A power amplifier circuit includes a lower-stage transistor having a first power supply voltage supplied to a first terminal, a second terminal connected to ground, and a first signal supplied to a third terminal; an upper-stage transistor having a second power supply voltage supplied to a first terminal, a second signal obtained by amplifying the first signal being output from the first terminal, a second terminal connected to the first terminal of the lower-stage transistor via a first capacitor, and a third terminal connected to ground via a ground path; an inductor that connects the second terminal of the upper-stage transistor to ground; and an adjustment circuit that adjusts impedance seen from the third terminal of the upper-stage transistor. The adjustment circuit includes a second capacitor and at least one resistance element connected in series with the ground path between the third terminal of the upper-stage transistor and ground.
    Type: Application
    Filed: December 10, 2019
    Publication date: June 18, 2020
    Inventors: Satoshi TANAKA, Kazuo WATANABE, Norio HAYASHI, Makoto ITOU
  • Patent number: 10239351
    Abstract: [Object] A pneumatic tire 2 which is excellent in durability is provided. [Solution] The tire 2 includes adhesive sheet layers 28. Each adhesive sheet layer 28 includes an interposed portion 58 and a protruding portion 60. The interposed portion 58 is interposed between a base layer 32 and a cap layer 34 of a tread 4. The protruding portion 60 is layered over a carcass 12. The adhesive sheet layers 28 are obtained by a rubber composition being crosslinked. The rubber composition contains a tackifier. A width W1 of the interposed portion 58 is preferably greater than or equal to 5 mm, and preferably not greater than 20 mm. A width W2 of the protruding portion 60 is preferably greater than or equal to 10 mm, and preferably not greater than 20 mm. A thickness of each adhesive sheet layer 28 is preferably greater than or equal to 0.5 mm, and preferably not greater than 2.0 mm.
    Type: Grant
    Filed: October 25, 2012
    Date of Patent: March 26, 2019
    Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.
    Inventors: Ryo Oba, Daisuke Utsumi, Norio Hayashi
  • Publication number: 20190089307
    Abstract: A power amplifier circuit includes an amplifier that receives an input signal with an alternating current and outputs an output signal obtained by amplifying power of the input signal to a first node; an inductive element that is connected between the first node and a second node; and a variable capacitor that is connected between the second node and a reference potential, and whose electrostatic capacitance increases as power of the output signal increases.
    Type: Application
    Filed: September 20, 2018
    Publication date: March 21, 2019
    Inventors: Satoshi Tanaka, Masatoshi Hase, Norio Hayashi, Kazuo Watanabe, Yuuri Honda
  • Patent number: 10236828
    Abstract: A power amplifier has improved power added efficiency at high output power. The power amplifier includes: a first transistor for amplifying an input signal input to the base thereof and outputting the amplified signal from the collector thereof; a second transistor with power-supply voltage applied to the collector thereof to supply bias voltage or bias current from the emitter thereof to the base of the first transistor; a third transistor whose collector is connected to the collector of the first transistor to amplify the input signal input to the base thereof and output the amplified signal from a collector thereof; a fourth transistor whose base and collector are connected to supply bias from the emitter thereof to the base of the third transistor; and a first resistor with bias control voltage applied to one end thereof and the other end connected to the bases of the second and fourth transistors.
    Type: Grant
    Filed: August 23, 2017
    Date of Patent: March 19, 2019
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kazuma Sugiura, Takashi Yamada, Norio Hayashi, Satoshi Tanaka, Kenichi Shimamoto, Kazuo Watanabe
  • Publication number: 20180041169
    Abstract: A power amplifier has improved power added efficiency at high output power. The power amplifier includes: a first transistor for amplifying an input signal input to the base thereof and outputting the amplified signal from the collector thereof; a second transistor with power-supply voltage applied to the collector thereof to supply bias voltage or bias current from the emitter thereof to the base of the first transistor; a third transistor whose collector is connected to the collector of the first transistor to amplify the input signal input to the base thereof and output the amplified signal from a collector thereof; a fourth transistor whose base and collector are connected to supply bias from the emitter thereof to the base of the third transistor; and a first resistor with bias control voltage applied to one end thereof and the other end connected to the bases of the second and fourth transistors.
    Type: Application
    Filed: August 23, 2017
    Publication date: February 8, 2018
    Inventors: Kazuma Sugiura, Takashi Yamada, Norio Hayashi, Satoshi Tanaka, Kenichi Shimamoto, Kazuo Watanabe
  • Patent number: 9768729
    Abstract: A power amplifier has improved power added efficiency at high output power. The power amplifier includes: a first transistor for amplifying an input signal input to the base thereof and outputting the amplified signal from the collector thereof; a second transistor with power-supply voltage applied to the collector thereof to supply bias voltage or bias current from the emitter thereof to the base of the first transistor; a third transistor whose collector is connected to the collector of the first transistor to amplify the input signal input to the base thereof and output the amplified signal from a collector thereof; a fourth transistor whose base and collector are connected to supply bias from the emitter thereof to the base of the third transistor; and a first resistor with bias control voltage applied to one end thereof and the other end connected to the bases of the second and fourth transistors.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: September 19, 2017
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kazuma Sugiura, Takashi Yamada, Norio Hayashi, Satoshi Tanaka, Kenichi Shimamoto, Kazuo Watanabe
  • Publication number: 20170237400
    Abstract: The present disclosure is to improve the power added efficiency of a power amplifier at high output power. The power amplifier includes: a first capacitor with a radio frequency signal input to one end thereof; a first transistor whose base is connected to the other end of the first capacitor to amplify the radio frequency signal; a bias circuit for supplying bias to the base of the first transistor; and a second capacitor with one end connected to the base of the first transistor and the other end connected to the emitter of the first transistor.
    Type: Application
    Filed: May 3, 2017
    Publication date: August 17, 2017
    Inventors: Kazuo Watanabe, Satoshi Tanaka, Norio Hayashi, Kazuma Sugiura
  • Patent number: 9673763
    Abstract: The present disclosure is to improve the power added efficiency of a power amplifier at high output power. The power amplifier includes: a first capacitor with a radio frequency signal input to one end thereof; a first transistor whose base is connected to the other end of the first capacitor to amplify the radio frequency signal; a bias circuit for supplying bias to the base of the first transistor; and a second capacitor with one end connected to the base of the first transistor and the other end connected to the emitter of the first transistor.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: June 6, 2017
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Kazuo Watanabe, Satoshi Tanaka, Norio Hayashi, Kazuma Sugiura
  • Publication number: 20160134241
    Abstract: A power amplifier has improved power added efficiency at high output power. The power amplifier includes: a first transistor for amplifying an input signal input to the base thereof and outputting the amplified signal from the collector thereof; a second transistor with power-supply voltage applied to the collector thereof to supply bias voltage or bias current from the emitter thereof to the base of the first transistor; a third transistor whose collector is connected to the collector of the first transistor to amplify the input signal input to the base thereof and output the amplified signal from a collector thereof; a fourth transistor whose base and collector are connected to supply bias from the emitter thereof to the base of the third transistor; and a first resistor with bias control voltage applied to one end thereof and the other end connected to the bases of the second and fourth transistors.
    Type: Application
    Filed: September 23, 2015
    Publication date: May 12, 2016
    Inventors: Kazuma Sugiura, Takashi Yamada, Norio Hayashi, Satoshi Tanaka, Kenichi Shimamoto, Kazuo Watanabe
  • Publication number: 20160134242
    Abstract: The present disclosure is to improve the power added efficiency of a power amplifier at high output power. The power amplifier includes: a first capacitor with a radio frequency signal input to one end thereof; a first transistor whose base is connected to the other end of the first capacitor to amplify the radio frequency signal; a bias circuit for supplying bias to the base of the first transistor; and a second capacitor with one end connected to the base of the first transistor and the other end connected to the emitter of the first transistor.
    Type: Application
    Filed: October 29, 2015
    Publication date: May 12, 2016
    Inventors: Kazuo Watanabe, Satoshi Tanaka, Norio Hayashi, Kazuma Sugiura
  • Patent number: 9166542
    Abstract: When the frequency bandwidth of a high frequency signal to be amplified is changed, the linearity of a high frequency module deteriorates. A high frequency module has an amplifier circuit including an amplification transistor and a variable impedance circuit, and an output matching network. Based on an amplifying operation, the amplified high frequency signal will contain unwanted signals of secondary distortion components. In a frequency band that generates such unwanted signals of secondary distortion components, the output impedance of the amplifier circuit is changed so that the impedance will not match between the amplifier circuit and the output matching network. The output impedance of the amplifier circuit is changed by controlling the variable impedance circuit.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: October 20, 2015
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Norio Hayashi, Satoshi Shimizu, Ryo Kadoi, Akio Yamamoto
  • Publication number: 20150007916
    Abstract: [Object] A pneumatic tire 2 which is excellent in durability is provided. [Solution] The tire 2 includes adhesive sheet layers 28. Each adhesive sheet layer 28 includes an interposed portion 58 and a protruding portion 60. The interposed portion 58 is interposed between a base layer 32 and a cap layer 34 of a tread 4. The protruding portion 60 is layered over a carcass 12. The adhesive sheet layers 28 are obtained by a rubber composition being crosslinked. The rubber composition contains a tackifier. A width W1 of the interposed portion 58 is preferably greater than or equal to 5 mm, and preferably not greater than 20 mm. A width W2 of the protruding portion 60 is preferably greater than or equal to 10 mm, and preferably not greater than 20 mm. A thickness of each adhesive sheet layer 28 is preferably greater than or equal to 0.5 mm, and preferably not greater than 2.0 mm.
    Type: Application
    Filed: October 25, 2012
    Publication date: January 8, 2015
    Applicant: SUMITOMO RUBBER INDUSTRIES, LTD
    Inventors: Ryo Oba, Daisuke Utsumi, Norio Hayashi
  • Publication number: 20140354360
    Abstract: When the frequency bandwidth of a high frequency signal to be amplified is changed, the linearity of a high frequency module deteriorates. A high frequency module has an amplifier circuit including an amplification transistor and a variable impedance circuit, and an output matching network. Based on an amplifying operation, the amplified high frequency signal will contain unwanted signals of secondary distortion components. In a frequency band that generates such unwanted signals of secondary distortion components, the output impedance of the amplifier circuit is changed so that the impedance will not match between the amplifier circuit and the output matching network. The output impedance of the amplifier circuit is changed by controlling the variable impedance circuit.
    Type: Application
    Filed: December 5, 2012
    Publication date: December 4, 2014
    Inventors: Norio Hayashi, Satoshi Shimizu, Ryo Kadoi, Akio Yamamoto