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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Patent number: 9685911Abstract: 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: GrantFiled: August 20, 2015Date of Patent: June 20, 2017Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takayuki Tsutsui, Tadashi Matsuoka, Satoshi Tanaka
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Publication number: 20170163229Abstract: 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: November 30, 2016Publication date: June 8, 2017Inventors: Yasushi OYAMA, Takayuki TSUTSUI, Kazuhito NAKAI
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Publication number: 20170155367Abstract: 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: ApplicationFiled: September 23, 2016Publication date: June 1, 2017Inventors: Kazuo WATANABE, Satoshi TANAKA, Kazuhito NAKAI, Takayuki TSUTSUI
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Patent number: 9647775Abstract: 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: November 11, 2016Date of Patent: May 9, 2017Assignee: MURATA MANUFACTURING CO., LTDInventors: Takayuki Tsutsui, Satoshi Tanaka, Hidenori Obiya
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Publication number: 20170127359Abstract: 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 11, 2017Publication date: May 4, 2017Inventors: Satoshi Tanaka, Kiichiro Takenaka, Takayuki Tsutsui, Taizo Yamawaki, Shun Imai
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Patent number: 9642103Abstract: 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: GrantFiled: March 28, 2016Date of Patent: May 2, 2017Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Satoshi Tanaka, Takayuki Tsutsui, Yusuke Tanaka, Hayato Nakamura, Kazuhito Nakai
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Publication number: 20170099033Abstract: Provided is a current output circuit that includes: a first FET that has a power supply voltage supplied to a source thereof, that has a first voltage supplied to a gate thereof and that outputs a first current from a drain thereof; a second FET that has the power supply voltage supplied to a source thereof, that has the first voltage supplied to a gate thereof and that outputs an output current from a drain thereof; a first control circuit that controls the first voltage such that the first current comes to be at a target level; and a second control circuit that performs control such that a drain voltage of the first FET and a drain voltage of the second FET are made equal to each other.Type: ApplicationFiled: September 23, 2016Publication date: April 6, 2017Inventors: Yusuke SHIMAMUNE, Satoshi TANAKA, Takayuki TSUTSUI, Hayato NAKAMURA, Kazuhito NAKAI, Fuminori MORISAWA
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Patent number: 9585105Abstract: 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: August 19, 2016Date of Patent: February 28, 2017Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Satoshi Tanaka, Kiichiro Takenaka, Takayuki Tsutsui, Taizo Yamawaki, Shun Imai
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Publication number: 20160381648Abstract: 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: March 28, 2016Publication date: December 29, 2016Inventors: Satoshi TANAKA, Takayuki TSUTSUI, Yusuke TANAKA, Hayato NAKAMURA, Kazuhito NAKAI
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Publication number: 20160360495Abstract: 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: August 19, 2016Publication date: December 8, 2016Inventors: Satoshi Tanaka, Kiichiro Takenaka, Takayuki Tsutsui, Taizo Yamawaki, Shun Imai
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Patent number: 9451561Abstract: 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: December 5, 2012Date of Patent: September 20, 2016Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Satoshi Tanaka, Kiichiro Takenaka, Takayuki Tsutsui, Taizo Yamawaki, Shun Imai
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Patent number: 9407207Abstract: An radio frequency amplifying circuit includes an amplifying transistor configured to amplify a radio frequency signal input to a base of the amplifying transistor via a matching network to output the amplified radio frequency signal, a first bias transistor connected to the amplifying transistor based on a current-mirror connection to supply a bias to the amplifying transistor, and a second bias transistor connected to the base of the amplifying transistor based on an emitter-follower connection to supply a bias to the amplifying transistor.Type: GrantFiled: March 12, 2014Date of Patent: August 2, 2016Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takayuki Tsutsui, Satoshi Tanaka, Kenichi Shimamoto
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Patent number: 9397710Abstract: A power amplifier module includes a first signal input terminal to which a first radio frequency signal of a first frequency band is input; a second signal input terminal to which a second radio frequency signal of a second frequency band is input; first, second, and third power amplifiers; and a bias control circuit. The first signal input terminal and an input terminal of the first power amplifier are electrically connected to each other, the second signal input terminal and an input terminal of the second power amplifier are electrically connected to each other, output terminals of the first and second power amplifiers and an input terminal of the third power amplifier are electrically connected to each other, and the bias control circuit controls supplying a bias current to one of the first and second power amplifiers depending on a selected frequency band.Type: GrantFiled: February 12, 2015Date of Patent: July 19, 2016Assignee: MURATA MANUFACTURING CO., LTD.Inventor: Takayuki Tsutsui
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Patent number: 9385660Abstract: An radio frequency amplifying circuit includes an amplifying transistor configured to amplify a radio frequency signal input to a base of the amplifying transistor via a matching network to output the amplified radio frequency signal, a first bias transistor connected to the amplifying transistor based on a current-mirror connection to supply a bias to the amplifying transistor, and a second bias transistor connected to the base of the amplifying transistor based on an emitter-follower connection to supply a bias to the amplifying transistor.Type: GrantFiled: July 24, 2015Date of Patent: July 5, 2016Assignee: Murata Manufacturing Co., Ltd.Inventors: Takayuki Tsutsui, Satoshi Tanaka, Kenichi Shimamoto
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Publication number: 20160072445Abstract: 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: August 20, 2015Publication date: March 10, 2016Inventors: Takayuki TSUTSUI, Tadashi MATSUOKA, Satoshi TANAKA
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Publication number: 20150333702Abstract: An radio frequency amplifying circuit includes an amplifying transistor configured to amplify a radio frequency signal input to a base of the amplifying transistor via a matching network to output the amplified radio frequency signal, a first bias transistor connected to the amplifying transistor based on a current-mirror connection to supply a bias to the amplifying transistor, and a second bias transistor connected to the base of the amplifying transistor based on an emitter-follower connection to supply a bias to the amplifying transistor.Type: ApplicationFiled: July 24, 2015Publication date: November 19, 2015Inventors: Takayuki TSUTSUI, Satoshi TANAKA, Kenichi SHIMAMOTO
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Publication number: 20150249433Abstract: A power amplifier module includes a first signal input terminal to which a first radio frequency signal of a first frequency band is input; a second signal input terminal to which a second radio frequency signal of a second frequency band is input; first, second, and third power amplifiers; and a bias control circuit. The first signal input terminal and an input terminal of the first power amplifier are electrically connected to each other, the second signal input terminal and an input terminal of the second power amplifier are electrically connected to each other, output terminals of the first and second power amplifiers and an input terminal of the third power amplifier are electrically connected to each other, and the bias control circuit controls supplying a bias current to one of the first and second power amplifiers depending on a selected frequency band.Type: ApplicationFiled: February 12, 2015Publication date: September 3, 2015Inventor: Takayuki Tsutsui
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Publication number: 20150011256Abstract: 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: December 5, 2012Publication date: January 8, 2015Applicant: Murata Manufacturing Co., Ltd.Inventors: Satoshi Tanaka, Kiichiro Takenaka, Takayuki Tsutsui, Taizo Yamawaki, Shun Imai
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Publication number: 20140285268Abstract: An radio frequency amplifying circuit includes an amplifying transistor configured to amplify a radio frequency signal input to a base of the amplifying transistor via a matching network to output the amplified radio frequency signal, a first bias transistor connected to the amplifying transistor based on a current-mirror connection to supply a bias to the amplifying transistor, and a second bias transistor connected to the base of the amplifying transistor based on an emitter-follower connection to supply a bias to the amplifying transistor.Type: ApplicationFiled: March 12, 2014Publication date: September 25, 2014Applicant: MURATA MANUFACTURING CO., LTD.Inventors: Takayuki TSUTSUI, Satoshi TANAKA, Kenichi SHIMAMOTO
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Patent number: 8810285Abstract: In a semiconductor integrated circuit apparatus and a radio-frequency power amplifier module, a log detection portion including multiple-stage amplifier circuits, multiple level detection circuits, adder circuits, and a linear detection portion including a level detection circuit are provided. Output current from the log detection portion and output current from the linear detection portion are multiplied by different coefficients and the results of the multiplication are added to each other to realize the multiple detection methods. For example, current resulting from multiplication of the output current from the log detection portion by ×6/5 is added to the output current from the linear detection portion to realize a log detection method and, current resulting from multiplication of the output current from the log detection portion by ×? is added to current resulting from multiplication of the output current from the linear detection portion by ×3 to realize a log-linear detection method.Type: GrantFiled: September 13, 2013Date of Patent: August 19, 2014Assignee: Murata Manufacturing Co., Ltd.Inventors: Yusuke Shimamune, Yasunobu Yoshizaki, Norio Hayashi, Takayuki Tsutsui