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).
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Patent number: 11784609Abstract: 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: GrantFiled: June 10, 2020Date of Patent: October 10, 2023Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Satoshi Tanaka, Masatoshi Hase, Norio Hayashi, Kazuo Watanabe, Yuuri Honda
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Patent number: 11515840Abstract: 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: GrantFiled: June 9, 2020Date of Patent: November 29, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kazuo Watanabe, Satoshi Tanaka, Norio Hayashi, Kazuma Sugiura
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Patent number: 11387796Abstract: 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: GrantFiled: December 10, 2019Date of Patent: July 12, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Satoshi Tanaka, Kazuo Watanabe, Norio Hayashi, Makoto Itou
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Publication number: 20200304070Abstract: 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: ApplicationFiled: June 9, 2020Publication date: September 24, 2020Inventors: Kazuo Watanabe, Satoshi Tanaka, Norio Hayashi, Kazuma Sugiura
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Publication number: 20200304071Abstract: 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: ApplicationFiled: June 10, 2020Publication date: September 24, 2020Inventors: Satoshi Tanaka, Masatoshi HASE, Norio HAYASHI, Kazuo WATANABE, Yuuri HONDA
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Patent number: 10715084Abstract: 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: GrantFiled: September 20, 2018Date of Patent: July 14, 2020Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Satoshi Tanaka, Masatoshi Hase, Norio Hayashi, Kazuo Watanabe, Yuuri Honda
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Patent number: 10693418Abstract: 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: GrantFiled: May 3, 2017Date of Patent: June 23, 2020Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kazuo Watanabe, Satoshi Tanaka, Norio Hayashi, Kazuma Sugiura
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Publication number: 20200195210Abstract: 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: ApplicationFiled: December 10, 2019Publication date: June 18, 2020Inventors: Satoshi TANAKA, Kazuo WATANABE, Norio HAYASHI, Makoto ITOU
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Patent number: 10239351Abstract: [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: GrantFiled: October 25, 2012Date of Patent: March 26, 2019Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Ryo Oba, Daisuke Utsumi, Norio Hayashi
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Publication number: 20190089307Abstract: 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: ApplicationFiled: September 20, 2018Publication date: March 21, 2019Inventors: Satoshi Tanaka, Masatoshi Hase, Norio Hayashi, Kazuo Watanabe, Yuuri Honda
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Patent number: 10236828Abstract: 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: GrantFiled: August 23, 2017Date of Patent: March 19, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kazuma Sugiura, Takashi Yamada, Norio Hayashi, Satoshi Tanaka, Kenichi Shimamoto, Kazuo Watanabe
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Publication number: 20180041169Abstract: 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: ApplicationFiled: August 23, 2017Publication date: February 8, 2018Inventors: Kazuma Sugiura, Takashi Yamada, Norio Hayashi, Satoshi Tanaka, Kenichi Shimamoto, Kazuo Watanabe
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Patent number: 9768729Abstract: 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: GrantFiled: September 23, 2015Date of Patent: September 19, 2017Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kazuma Sugiura, Takashi Yamada, Norio Hayashi, Satoshi Tanaka, Kenichi Shimamoto, Kazuo Watanabe
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Publication number: 20170237400Abstract: 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: ApplicationFiled: May 3, 2017Publication date: August 17, 2017Inventors: Kazuo Watanabe, Satoshi Tanaka, Norio Hayashi, Kazuma Sugiura
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Patent number: 9673763Abstract: 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: GrantFiled: October 29, 2015Date of Patent: June 6, 2017Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kazuo Watanabe, Satoshi Tanaka, Norio Hayashi, Kazuma Sugiura
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Publication number: 20160134241Abstract: 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: ApplicationFiled: September 23, 2015Publication date: May 12, 2016Inventors: Kazuma Sugiura, Takashi Yamada, Norio Hayashi, Satoshi Tanaka, Kenichi Shimamoto, Kazuo Watanabe
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Publication number: 20160134242Abstract: 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: ApplicationFiled: October 29, 2015Publication date: May 12, 2016Inventors: Kazuo Watanabe, Satoshi Tanaka, Norio Hayashi, Kazuma Sugiura
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Patent number: 9166542Abstract: 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: GrantFiled: December 5, 2012Date of Patent: October 20, 2015Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Norio Hayashi, Satoshi Shimizu, Ryo Kadoi, Akio Yamamoto
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Publication number: 20150007916Abstract: [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: ApplicationFiled: October 25, 2012Publication date: January 8, 2015Applicant: SUMITOMO RUBBER INDUSTRIES, LTDInventors: Ryo Oba, Daisuke Utsumi, Norio Hayashi
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Publication number: 20140354360Abstract: 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: ApplicationFiled: December 5, 2012Publication date: December 4, 2014Inventors: Norio Hayashi, Satoshi Shimizu, Ryo Kadoi, Akio Yamamoto