Patents by Inventor Fuminori Morisawa
Fuminori Morisawa 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: 20240056040Abstract: A radio-frequency module includes a power amplifier, a first bias circuit connected to the power amplifier, and a second bias circuit connected to the power amplifier. The first bias circuit includes a register that receives a first digital control signal corresponding to a power mode of the power amplifier and a current generation circuit that generates, based on information in the register, a first bias current, and the second bias circuit includes another register that receives a second digital control signal corresponding to the power mode and a current generation circuit that generates, based on information in the other register, a second bias current.Type: ApplicationFiled: June 1, 2023Publication date: February 15, 2024Applicant: Murata Manufacturing Co., Ltd.Inventors: Satoshi SAKURAI, Toshiki MATSUI, Yasunobu YOSHIZAKI, Fuminori MORISAWA
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Publication number: 20230361170Abstract: To provide a semiconductor device and a semiconductor module that are capable of improving a heat dissipation property in the semiconductor device including a heat generating element. A semiconductor device includes: a P-type semiconductor substrate, which has a main surface and a main surface opposed to the main surface; an N-type N well, which is provided on the main surface side of the semiconductor substrate; a unit field effect transistor, which is provided in the N well; a P-type heat dissipation guard ring region, which is provided on the main surface side of the semiconductor substrate on the outside of the N well in plan view of the semiconductor substrate; wiring, which is provided on the heat dissipation guard ring region; bump placement portions; and bumps.Type: ApplicationFiled: July 14, 2023Publication date: November 9, 2023Inventors: Fuminori MORISAWA, Kazuhiro UEDA
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Patent number: 11463060Abstract: The present disclosure provides a power amplifier circuit capable of suppressing the occurrence of noises while enabling control of an output power level. The power amplifier circuit includes a first transistor that amplifies a first signal; a bias circuit that supplies a bias current or voltage based on a control signal to the first transistor; a second transistor to which a control current based on the control signal is supplied, which has an emitter or a source thereof connected to a collector or a drain of the first transistor, and from which a second signal obtained by amplifying the first signal is output; and a first feedback circuit provided between the collector or the drain of the second transistor and the base or the gate of the second transistor.Type: GrantFiled: September 30, 2020Date of Patent: October 4, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Yuri Honda, Fumio Harima, Yoshiki Kogushi, Shota Ishihara, Fuminori Morisawa
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Patent number: 11398805Abstract: Provided is a power amplification module that includes: an amplification transistor that has a constant power supply voltage supplied to a collector thereof, a bias current supplied to a base thereof and that amplifies an input signal input to the base thereof and outputs an amplified signal from the collector thereof; a first current source that outputs a first current that corresponds to a level control voltage that is for controlling a signal level of the amplified signal; and a bias transistor that has the first current supplied to a collector thereof, a bias control voltage connected to a base thereof and that outputs the bias current from an emitter thereof.Type: GrantFiled: June 13, 2018Date of Patent: July 26, 2022Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Shota Ishihara, Yusuke Shimamune, Takashi Soga, Fuminori Morisawa, Seiko Ono, Tetsuaki Adachi
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Publication number: 20210234523Abstract: There is provided a power amplifier circuit with improved operation speed of the protection function against overcurrent or overvoltage. The power amplifier circuit includes an amplifier configured to amplify a radio frequency signal and output the radio frequency signal, a bias current supply circuit configured to supply a bias current to the amplifier, a detection circuit configured to detect whether the current or voltage of the amplifier is equal to or greater than a predetermined threshold; and a draw circuit configured to, when the detection circuit detects that the current or voltage is equal to or greater than the predetermined threshold, draw at least a part of the bias current supplied to the amplifier.Type: ApplicationFiled: April 14, 2021Publication date: July 29, 2021Inventors: Fuminori MORISAWA, Kazuhiko ISHIMOTO, Fumio HARIMA
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Publication number: 20210013855Abstract: The present disclosure provides a power amplifier circuit capable of suppressing the occurrence of noises while enabling control of an output power level. The power amplifier circuit includes a first transistor that amplifies a first signal; a bias circuit that supplies a bias current or voltage based on a control signal to the first transistor; a second transistor to which a control current based on the control signal is supplied, which has an emitter or a source thereof connected to a collector or a drain of the first transistor, and from which a second signal obtained by amplifying the first signal is output; and a first feedback circuit provided between the collector or the drain of the second transistor and the base or the gate of the second transistor.Type: ApplicationFiled: September 30, 2020Publication date: January 14, 2021Inventors: Yuri HONDA, Fumio HARIMA, Yoshiki KOGUSHI, Shota ISHIHARA, Fuminori MORISAWA
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Patent number: 10892720Abstract: A control circuit includes a first output unit configured to output a constant bias current for setting an electrical bias state of a bias circuit to the bias circuit; a second output unit configured to output a bias control current or constant voltage for controlling the electrical bias state of the bias circuit to the bias circuit; a resistor having one end connected to a reference potential; and a switch provided between another end of the resistor and an output terminal of the second output unit.Type: GrantFiled: March 26, 2019Date of Patent: January 12, 2021Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Takeyuki Okabe, Fuminori Morisawa, Mizuho Ishikawa, Yuri Honda
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Patent number: 10826453Abstract: The present disclosure provides a power amplifier circuit capable of suppressing the occurrence of noises while enabling control of an output power level. The power amplifier circuit includes a first transistor that amplifies a first signal; a bias circuit that supplies a bias current or voltage based on a control signal to the first transistor; a second transistor to which a control current based on the control signal is supplied, which has an emitter or a source thereof connected to a collector or a drain of the first transistor, and from which a second signal obtained by amplifying the first signal is output; and a first feedback circuit provided between the collector or the drain of the second transistor and the base or the gate of the second transistor.Type: GrantFiled: September 19, 2018Date of Patent: November 3, 2020Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Yuri Honda, Fumio Harima, Yoshiki Kogushi, Shota Ishihara, Fuminori Morisawa
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Patent number: 10715093Abstract: A power amplifier module includes a first transistor that amplifies and outputs a radio frequency signal, a second transistor smaller in size than the first transistor and connected in parallel with the first transistor, a third transistor that supplies a bias current to the first and second transistors, a current detection circuit that detects a current flowing through a collector of the second transistor, and a bias control circuit that controls the bias current supplied from the third transistor to the first and second transistors by supplying a current corresponding to a detection result of the current detection circuit to a collector or a drain of the third transistor. In a case that a current flowing through the collector of the second transistor is larger than a predetermined threshold value, the bias control circuit reduces the current supplied to the collector or the drain of the third transistor.Type: GrantFiled: February 25, 2019Date of Patent: July 14, 2020Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Fuminori Morisawa, Kenji Mukai, Yuri Honda
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Patent number: 10637401Abstract: 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: GrantFiled: December 13, 2017Date of Patent: April 28, 2020Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Yusuke Shimamune, Satoshi Tanaka, Takayuki Tsutsui, Hayato Nakamura, Kazuhito Nakai, Fuminori Morisawa
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Patent number: 10476454Abstract: A power amplifier module includes a first current source that outputs a first current corresponding to a level control voltage for controlling a signal level of an amplified signal, a second current source that outputs a second current corresponding to the level control voltage, a first transistor in which an input signal and a first bias current are supplied to a base and an emitter is grounded, a second transistor in which an emitter is connected to a collector of the first transistor, the second current is supplied to a base, and a first amplified signal obtained by amplifying the input signal is output from a collector, and a third transistor in which the first current is supplied to a collector, a bias control current or voltage is supplied to a base, and the first bias current is supplied from an emitter to the base of the first transistor.Type: GrantFiled: February 20, 2019Date of Patent: November 12, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Shota Ishihara, Seiko Ono, Yusuke Shimamune, Fuminori Morisawa, Shizuki Nakajima, Yuri Honda, Kazuhiro Koshio, Masato Sato
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Publication number: 20190326865Abstract: A control circuit includes a first output unit configured to output a constant bias current for setting an electrical bias state of a bias circuit to the bias circuit; a second output unit configured to output a bias control current or constant voltage for controlling the electrical bias state of the bias circuit to the bias circuit; a resistor having one end connected to a reference potential; and a switch provided between another end of the resistor and an output terminal of the second output unit.Type: ApplicationFiled: March 26, 2019Publication date: October 24, 2019Inventors: Takeyuki OKABE, Fuminori MORISAWA, Mizuho ISHIKAWA, Yuri HONDA
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Publication number: 20190280658Abstract: A power amplifier module includes a first transistor that amplifies and outputs a radio frequency signal, a second transistor smaller in size than the first transistor and connected in parallel with the first transistor, a third transistor that supplies a bias current to the first and second transistors, a current detection circuit that detects a current flowing through a collector of the second transistor, and a bias control circuit that controls the bias current supplied from the third transistor to the first and second transistors by supplying a current corresponding to a detection result of the current detection circuit to a collector or a drain of the third transistor. In a case that a current flowing through the collector of the second transistor is larger than a predetermined threshold value, the bias control circuit reduces the current supplied to the collector or the drain of the third transistor.Type: ApplicationFiled: February 25, 2019Publication date: September 12, 2019Inventors: Fuminori MORISAWA, Kenji MUKAI, Yuri HONDA
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Patent number: 10396718Abstract: Provided is a bias control circuit that includes: a reference voltage circuit that generates a reference voltage; a resistor; a temperature dependent current generating circuit that generates a temperature dependent current, which changes depending on temperature, on the basis of the reference voltage and that supplies the temperature dependent current to one end of the resistor; a reference voltage buffer circuit that applies the reference voltage to the other end of the resistor; a constant current generating circuit that generates a constant current, which is for driving the reference voltage buffer circuit, on the basis of the reference voltage and that supplies the constant current to the other end of the resistor; and a bias generating circuit that generates a bias voltage or a bias current for a power amplification circuit on the basis of the voltage at the one end of the resistor.Type: GrantFiled: January 15, 2018Date of Patent: August 27, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Yoshiaki Harasawa, Fuminori Morisawa
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Publication number: 20190181816Abstract: A power amplifier module includes a first current source that outputs a first current corresponding to a level control voltage for controlling a signal level of an amplified signal, a second current source that outputs a second current corresponding to the level control voltage, a first transistor in which an input signal and a first bias current are supplied to a base and an emitter is grounded, a second transistor in which an emitter is connected to a collector of the first transistor, the second current is supplied to a base, and a first amplified signal obtained by amplifying the input signal is output from a collector, and a third transistor in which the first current is supplied to a collector, a bias control current or voltage is supplied to a base, and the first bias current is supplied from an emitter to the base of the first transistor.Type: ApplicationFiled: February 20, 2019Publication date: June 13, 2019Inventors: Shota ISHIHARA, Seiko ONO, Yusuke SHIMAMUNE, Fuminori MORISAWA, Shizuki NAKAJIMA, Yuri HONDA, Kazuhiro KOSHIO, Masato SATO
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Patent number: 10256778Abstract: A power amplifier module includes a first current source that outputs a first current corresponding to a level control voltage for controlling a signal level of an amplified signal, a second current source that outputs a second current corresponding to the level control voltage, a first transistor in which an input signal and a first bias current are supplied to a base and an emitter is grounded, a second transistor in which an emitter is connected to a collector of the first transistor, the second current is supplied to a base, and a first amplified signal obtained by amplifying the input signal is output from a collector, and a third transistor in which the first current is supplied to a collector, a bias control current or voltage is supplied to a base, and the first bias current is supplied from an emitter to the base of the first transistor.Type: GrantFiled: June 20, 2018Date of Patent: April 9, 2019Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Shota Ishihara, Seiko Ono, Yusuke Shimamune, Fuminori Morisawa, Shizuki Nakajima, Yuri Honda, Kazuhiro Koshio, Masato Sato
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Publication number: 20190103846Abstract: The present disclosure provides a power amplifier circuit capable of suppressing the occurrence of noises while enabling control of an output power level. The power amplifier circuit includes a first transistor that amplifies a first signal; a bias circuit that supplies a bias current or voltage based on a control signal to the first transistor; a second transistor to which a control current based on the control signal is supplied, which has an emitter or a source thereof connected to a collector or a drain of the first transistor, and from which a second signal obtained by amplifying the first signal is output; and a first feedback circuit provided between the collector or the drain of the second transistor and the base or the gate of the second transistor.Type: ApplicationFiled: September 19, 2018Publication date: April 4, 2019Inventors: Yuri HONDA, Fumio HARIMA, Yoshiki KOGUSHI, Shota ISHIHARA, Fuminori MORISAWA
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Publication number: 20180302045Abstract: A power amplifier module includes a first current source that outputs a first current corresponding to a level control voltage for controlling a signal level of an amplified signal, a second current source that outputs a second current corresponding to the level control voltage, a first transistor in which an input signal and a first bias current are supplied to a base and an emitter is grounded, a second transistor in which an emitter is connected to a collector of the first transistor, the second current is supplied to a base, and a first amplified signal obtained by amplifying the input signal is output from a collector, and a third transistor in which the first current is supplied to a collector, a bias control current or voltage is supplied to a base, and the first bias current is supplied from an emitter to the base of the first transistor.Type: ApplicationFiled: June 20, 2018Publication date: October 18, 2018Inventors: Shota ISHIHARA, Seiko ONO, Yusuke SHIMAMUNE, Fuminori MORISAWA, Shizuki NAKAJIMA, Yuri HONDA, Kazuhiro KOSHIO, Masato SATO
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Publication number: 20180294788Abstract: Provided is a power amplification module that includes: an amplification transistor that has a constant power supply voltage supplied to a collector thereof, a bias current supplied to a base thereof and that amplifies an input signal input to the base thereof and outputs an amplified signal from the collector thereof; a first current source that outputs a first current that corresponds to a level control voltage that is for controlling a signal level of the amplified signal; and a bias transistor that has the first current supplied to a collector thereof, a bias control voltage connected to a base thereof and that outputs the bias current from an emitter thereof.Type: ApplicationFiled: June 13, 2018Publication date: October 11, 2018Inventors: Shota Ishihara, Yusuke Shimamune, Takashi Soga, Fuminori Morisawa, Seiko Ono, Tetsuaki Adachi
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Patent number: 10044330Abstract: A power amplifier module includes a first current source that outputs a first current corresponding to a level control voltage for controlling a signal level of an amplified signal, a second current source that outputs a second current corresponding to the level control voltage, a first transistor in which an input signal and a first bias current are supplied to a base and an emitter is grounded, a second transistor in which an emitter is connected to a collector of the first transistor, the second current is supplied to a base, and a first amplified signal obtained by amplifying the input signal is output from a collector, and a third transistor in which the first current is supplied to a collector, a bias control current or voltage is supplied to a base, and the first bias current is supplied from an emitter to the base of the first transistor.Type: GrantFiled: September 20, 2017Date of Patent: August 7, 2018Assignee: MURATA MANUFACTURING CO., LTD.Inventors: Shota Ishihara, Seiko Ono, Yusuke Shimamune, Fuminori Morisawa, Shizuki Nakajima, Yuri Honda, Kazuhiro Koshio, Masato Sato