Patents by Inventor Takayuki Tsutsui
Takayuki Tsutsui 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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Publication number: 20190150100Abstract: A high-frequency signal processing apparatus and a wireless communication apparatus can achieve a decrease in power consumption. For example, when an indicated power level to a high-frequency power amplifier is equal to or greater than a second reference value, envelope tracking is performed by causing a source voltage control circuit to control a high-speed DCDC converter using a detection result of an envelope detecting circuit and causing a bias control circuit to indicate a fixed bias value. The source voltage control circuit and the bias control circuit indicate a source voltage and a bias value decreasing in proportion to a decrease in the indicated power level when the indicated power level is in a range of the second reference value to the first reference value, and indicate a fixed source voltage and a fixed bias value when the indicated power level is less than the first reference value.Type: ApplicationFiled: January 9, 2019Publication date: May 16, 2019Inventors: Satoshi TANAKA, Kiichiro TAKENAKA, Takayuki TSUTSUI, Taizo YAMAWAKI, Shun IMAI
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Patent number: 10291269Abstract: A power amplification module includes a first input terminal arranged to receive a first transmission signal in a first frequency band, a second input terminal arranged to receive a second transmission signal in a second frequency band higher than the first frequency band, a first amplification circuit that amplifies the first transmission signal, a second amplification circuit that amplifies the second transmission signal, a first filter circuit located between the first input terminal and the first amplification circuit, and a second filter circuit located between the second input terminal and the second amplification circuit. The first filter circuit is a low-pass filter that allows the first frequency band to pass therethrough and that attenuates a harmonic of the first transmission signal and the second transmission signal. The second filter circuit is a high-pass filter that allows the second frequency band to pass therethrough and that attenuates the first transmission signal.Type: GrantFiled: August 2, 2018Date of Patent: May 14, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takayuki Tsutsui, Satoshi Tanaka, Hidenori Obiya
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Patent number: 10284150Abstract: A power amplification module includes: a first transistor that amplifies a first radio frequency signal and outputs a second radio frequency signal; a second transistor that amplifies the second radio frequency signal and outputs a third radio frequency signal; and first and second bias circuits that supply first and second bias currents to bases of the first and second transistors. The first bias circuit includes a third transistor that outputs the first bias current from its emitter or source, a capacitor that is input with the first radio frequency signal and connected to the base of the first transistor, a first resistor connected between the emitter or source of the third transistor and the base of the first transistor, a second resistor connected between the capacitor and the emitter or source of the third transistor, and a third resistor connected between the capacitor and the base of the first transistor.Type: GrantFiled: September 27, 2017Date of Patent: May 7, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Kazuo Watanabe, Satoshi Tanaka, Kazuhito Nakai, Takayuki Tsutsui
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Publication number: 20190115338Abstract: An amplifier circuit including a semiconductor element is formed on a substrate. A protection circuit formed on the substrate includes a plurality of protection diodes that are connected in series with each other, and the protection circuit is connected to an output terminal of the amplifier circuit. A pad conductive layer at least partially includes a pad for connecting to a circuit outside the substrate. The pad conductive layer and the protection circuit at least partially overlap each other in plan view.Type: ApplicationFiled: December 13, 2018Publication date: April 18, 2019Applicant: Murata Manufacturing Co., Ltd.Inventors: Kenji SASAKI, Takayuki TSUTSUI, Isao OBU, Yasuhisa YAMAMOTO
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Patent number: 10250209Abstract: Provided is a power amplification module that supports a plurality of communication systems. The power amplification module includes: two power amplifiers that can be selectively connected in parallel with each other; a switch that, in accordance with one communication system selected from among the plurality of communication systems, selects one power amplifier that is to operate by itself from among the two power amplifiers or selects the two power amplifiers and connects the two power amplifiers in parallel with each other; and a phase correction circuit that, when the two power amplifiers are both selected, corrects a phase difference by being selectively connected between the outputs of the two selected power amplifiers such that a phase difference is not generated between the output signals of the two selected power amplifiers.Type: GrantFiled: May 3, 2018Date of Patent: April 2, 2019Assignee: MURATA MANUGACTURING CO., LTD.Inventors: Takayuki Tsutsui, Fumio Harima
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Publication number: 20190088768Abstract: A bipolar transistor includes a collector layer, a base layer, and an emitter layer that are formed in this order on a compound semiconductor substrate. The emitter layer is disposed inside an edge of the base layer in plan view. A base electrode is disposed on partial regions of the emitter layer and the base layer so as to extend from an inside of the emitter layer to an outside of the base layer in plan view. An insulating film is disposed between the base electrode and a portion of the base layer, with the portion not overlapping the emitter layer. An alloy layer extends from the base electrode through the emitter layer in a thickness direction and reaches the base layer. The alloy layer contains at least one element constituting the base electrode and elements constituting the emitter layer and the base layer.Type: ApplicationFiled: September 7, 2018Publication date: March 21, 2019Applicant: Murata Manufacturing Co., Ltd.Inventors: Isao OBU, Yasunari UMEMOTO, Masahiro SHIBATA, Shigeki KOYA, Masao KONDO, Takayuki TSUTSUI
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Publication number: 20190068142Abstract: A semiconductor device includes the following elements. A chip has a main surface substantially parallel with a plane defined by first and second directions intersecting with each other. A power amplifier amplifies an input signal and outputs an amplified signal from plural output terminals. First and second filter circuits attenuate harmonics of the amplified signal. The first filter circuit includes a first capacitor connected between the plural output terminals and a ground. The second filter circuit includes a second capacitor connected between the plural output terminals and a ground. On the main surface of the chip, the plural output terminals are disposed side by side in the first direction, and the first capacitor is disposed on a side in the first direction with respect to the plural output terminals, while the second capacitor is disposed on a side opposite the first direction with respect to the plural output terminals.Type: ApplicationFiled: August 27, 2018Publication date: February 28, 2019Inventors: Takayuki Tsutsui, Satoshi Tanaka
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Patent number: 10212671Abstract: A high-frequency signal processing apparatus and a wireless communication apparatus can achieve a decrease in power consumption. For example, when an indicated power level to a high-frequency power amplifier is equal to or greater than a second reference value, envelope tracking is performed by causing a source voltage control circuit to control a high-speed DCDC converter using a detection result of an envelope detecting circuit and causing a bias control circuit to indicate a fixed bias value. The source voltage control circuit and the bias control circuit indicate a source voltage and a bias value decreasing in proportion to a decrease in the indicated power level when the indicated power level is in a range of the second reference value to the first reference value, and indicate a fixed source voltage and a fixed bias value when the indicated power level is less than the first reference value.Type: GrantFiled: March 19, 2018Date of Patent: February 19, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Satoshi Tanaka, Kiichiro Takenaka, Takayuki Tsutsui, Taizo Yamawaki, Shun Imai
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Patent number: 10192862Abstract: An amplifier circuit including a semiconductor element is formed on a substrate. A protection circuit formed on the substrate includes a plurality of protection diodes that are connected in series with each other, and the protection circuit is connected to an output terminal of the amplifier circuit. A pad conductive layer at least partially includes a pad for connecting to a circuit outside the substrate. The pad conductive layer and the protection circuit at least partially overlap each other in plan view.Type: GrantFiled: February 22, 2018Date of Patent: January 29, 2019Assignee: Murata Manufacturing Co., Ltd.Inventors: Kenji Sasaki, Takayuki Tsutsui, Isao Obu, Yasuhisa Yamamoto
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Patent number: 10177724Abstract: A power amplifier circuit includes first and second transistors and a first voltage output circuit. A radio frequency signal is input into a base of the first transistor. The first voltage output circuit outputs a first voltage in accordance with a power supply voltage. The first voltage is supplied to a base or a gate of the second transistor. An emitter or a source of the second transistor is connected to a collector of the first transistor. A first amplified signal generated by amplifying the radio frequency signal is output from a collector or a drain of the second transistor.Type: GrantFiled: May 22, 2017Date of Patent: January 8, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Satoshi Tanaka, Kazuo Watanabe, Takayuki Tsutsui, Masao Kondo, Satoshi Arayashiki, Fumio Harima, Masatoshi Hase
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Publication number: 20190006075Abstract: An inductor includes first and second wirings respectively formed in a substantially spiral shape on first and second surfaces of a multilayer substrate. The multilayer substrate includes plural dielectric layers stacked on each other in a predetermined direction. The multilayer substrate includes a first layer having the first surface, which is an end surface in the predetermined direction, and a second layer having the second surface within the multilayer substrate. The width of the second wiring is smaller than that of the first wiring. The first and second wirings are electrically connected in parallel with each other. The inductance of the first wiring and that of the second wiring are substantially equal to each other. When the first and second wirings are projected on the first surface in the predetermined direction, entirety of a projected image of the second wiring is contained within that of the first wiring.Type: ApplicationFiled: July 3, 2018Publication date: January 3, 2019Inventors: Takeyuki OKABE, Eigo TANGE, Takayuki TSUTSUI
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Publication number: 20180343022Abstract: A power amplification module includes a first input terminal arranged to receive a first transmission signal in a first frequency band, a second input terminal arranged to receive a second transmission signal in a second frequency band higher than the first frequency band, a first amplification circuit that amplifies the first transmission signal, a second amplification circuit that amplifies the second transmission signal, a first filter circuit located between the first input terminal and the first amplification circuit, and a second filter circuit located between the second input terminal and the second amplification circuit. The first filter circuit is a low-pass filter that allows the first frequency band to pass therethrough and that attenuates a harmonic of the first transmission signal and the second transmission signal. The second filter circuit is a high-pass filter that allows the second frequency band to pass therethrough and that attenuates the first transmission signal.Type: ApplicationFiled: August 2, 2018Publication date: November 29, 2018Inventors: Takayuki TSUTSUI, Satoshi TANAKA, Hidenori OBIYA
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Publication number: 20180254759Abstract: Provided is a power amplification module that supports a plurality of communication systems. The power amplification module includes: two power amplifiers that can be selectively connected in parallel with each other; a switch that, in accordance with one communication system selected from among the plurality of communication systems, selects one power amplifier that is to operate by itself from among the two power amplifiers or selects the two power amplifiers and connects the two power amplifiers in parallel with each other; and a phase correction circuit that, when the two power amplifiers are both selected, corrects a phase difference by being selectively connected between the outputs of the two selected power amplifiers such that a phase difference is not generated between the output signals of the two selected power amplifiers.Type: ApplicationFiled: May 3, 2018Publication date: September 6, 2018Inventors: Takayuki TSUTSUI, Fumio HARIMA
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Patent number: 10069523Abstract: A power amplification module includes a first input terminal arranged to receive a first transmission signal in a first frequency band, a second input terminal arranged to receive a second transmission signal in a second frequency band higher than the first frequency band, a first amplification circuit that amplifies the first transmission signal, a second amplification circuit that amplifies the second transmission signal, a first filter circuit located between the first input terminal and the first amplification circuit, and a second filter circuit located between the second input terminal and the second amplification circuit. The first filter circuit is a low-pass filter that allows the first frequency band to pass therethrough and that attenuates a harmonic of the first transmission signal and the second transmission signal. The second filter circuit is a high-pass filter that allows the second frequency band to pass therethrough and that attenuates the first transmission signal.Type: GrantFiled: December 11, 2017Date of Patent: September 4, 2018Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takayuki Tsutsui, Satoshi Tanaka, Hidenori Obiya
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Publication number: 20180247926Abstract: An amplifier circuit including a semiconductor element is formed on a substrate. A protection circuit formed on the substrate includes a plurality of protection diodes that are connected in series with each other, and the protection circuit is connected to an output terminal of the amplifier circuit. A pad conductive layer at least partially includes a pad for connecting to a circuit outside the substrate. The pad conductive layer and the protection circuit at least partially overlap each other in plan view.Type: ApplicationFiled: February 22, 2018Publication date: August 30, 2018Applicant: Murata Manufacturing Co., Ltd.Inventors: Kenji SASAKI, Takayuki TSUTSUI, Isao OBU, Yasuhisa YAMAMOTO
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Publication number: 20180226933Abstract: In a power amplifier module for performing slope control of a transmitting signal, a gain variation due to a variation in battery voltage is suppressed while suppressing an increase in circuit size. The power amplifier module includes: a first regulator for outputting a first voltage corresponding to a control voltage for controlling a signal level; a second regulator for outputting a second voltage that rises as a battery voltage drops; a first amplifier supplied with the first voltage as a power-supply voltage to amplify an input signal and output an amplified signal; and a second amplifier for amplifying the amplified signal, wherein the second amplifier includes a first amplification unit supplied with the second voltage as the power-supply voltage to amplify the amplified signal, and a second amplification unit supplied with the battery voltage as the power-supply voltage to amplify the amplified signal.Type: ApplicationFiled: February 7, 2018Publication date: August 9, 2018Inventors: Takayuki TSUTSUI, Tadashi MATSUOKA, Satoshi TANAKA
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Publication number: 20180212578Abstract: A power amplification module includes a first input terminal that receives a first transmit signal in a first frequency band, a second input terminal that receives a second transmit signal in a second frequency band having a narrower transmit/receive frequency interval than the first frequency band, a first amplification circuit that receives and amplifies the first transmit signal to produce a first amplified signal and outputs the first amplified signal, a second amplification circuit that receives and amplifies the second transmit signal to produce a second amplified signal and outputs the second amplified signal, a third amplification circuit that receives and amplifies the first or second amplified signal to produce an output signal and outputs the output signal, and an attenuation circuit located between the second input terminal and the second amplification circuit and configured to attenuate a receive frequency band component of the second frequency band.Type: ApplicationFiled: March 20, 2018Publication date: July 26, 2018Inventors: Yasushi OYAMA, Takayuki TSUTSUI, Kazuhito NAKAI
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Publication number: 20180213488Abstract: A high-frequency signal processing apparatus and a wireless communication apparatus can achieve a decrease in power consumption. For example, when an indicated power level to a high-frequency power amplifier is equal to or greater than a second reference value, envelope tracking is performed by causing a source voltage control circuit to control a high-speed DCDC converter using a detection result of an envelope detecting circuit and causing a bias control circuit to indicate a fixed bias value. The source voltage control circuit and the bias control circuit indicate a source voltage and a bias value decreasing in proportion to a decrease in the indicated power level when the indicated power level is in a range of the second reference value to the first reference value, and indicate a fixed source voltage and a fixed bias value when the indicated power level is less than the first reference value.Type: ApplicationFiled: March 19, 2018Publication date: July 26, 2018Inventors: Satoshi Tanaka, Kiichiro Takenaka, Takayuki Tsutsui, Taizo Yamawaki, Shun Imai
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Patent number: 9991859Abstract: Provided is a power amplification module that supports a plurality of communication systems. The power amplification module includes: two power amplifiers that can be selectively connected in parallel with each other; a switch that, in accordance with one communication system selected from among the plurality of communication systems, selects one power amplifier that is to operate by itself from among the two power amplifiers or selects the two power amplifiers and connects the two power amplifiers in parallel with each other; and a phase correction circuit that, when the two power amplifiers are both selected, corrects a phase difference by being selectively connected between the outputs of the two selected power amplifiers such that a phase difference is not generated between the output signals of the two selected power amplifiers.Type: GrantFiled: September 20, 2017Date of Patent: June 5, 2018Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takayuki Tsutsui, Fumio Harima
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Publication number: 20180152902Abstract: Provided is a communication unit that includes first and second power-amplification modules, which can be integrated. The first power-amplification module includes a first power-amplifier for a first frequency band in a first communication scheme, a second power-amplifier for a second frequency band in the first communication scheme, a third power-amplifier for a third frequency band in a second communication scheme, a fourth power-amplifier for a fourth frequency band in the second communication scheme, a first bias circuit that generates a first bias current to the first and second power-amplifiers, and a bias current circuit that converts the first bias current into a second bias current to the third and fourth power-amplifiers. The second power-amplification module includes a fifth power-amplifier for a fifth frequency band in the first communication scheme, and a second bias circuit that generates a third bias current to the fifth power-amplifier.Type: ApplicationFiled: January 26, 2018Publication date: May 31, 2018Inventors: Satoshi TANAKA, Takayuki TSUTSUI, Yusuke TANAKA, Hayato NAKAMURA, Kazuhito NAKAI