Patents by Inventor Yusuke Yamamori
Yusuke Yamamori 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: 9872260Abstract: A power adjustment method includes: measuring output power that is obtained when input power to be amplified in a linear region is input to a power amplifier configured to amplify input power linearly in the linear region and amplify input power nonlinearly in a nonlinear region; deriving a straight line connecting a measurement point corresponding to the measured output power and a boundary point between the linear region and the nonlinear region in a coordinate plane representing input/output characteristics; acquiring information on an approximate equation that is stored in advance in correspondence with the measured output power, the approximate equation representing a relation between input power and output power in the nonlinear region; and storing information on the derived straight line and the acquired information on the approximate equation in a semiconductor integrated circuit provided at a preceding stage of the power amplifier.Type: GrantFiled: May 29, 2016Date of Patent: January 16, 2018Assignee: FUJITSU LIMITEDInventors: Nobuhide Hachiya, Takashi Tanii, Yasuhiro Murakami, Yusuke Yamamori, Yasuaki Takeuchi, Masahiko Hirao, Manabu Murakami, Mikio Hayashihara
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Patent number: 9503132Abstract: A wireless communication apparatus includes an amplifying unit that amplifies an input signal that includes signals with different frequencies of a first frequency and the second frequency; a measuring unit that measures a level of inter modulation distortion generated in a signal obtained by the input signal being amplified by the amplifying unit; a determining unit that determines whether the level of the inter modulation distortion measured by the measuring unit is equal to or greater than a regulation value that is previously stored; and a control unit that decreases, when a result of the determination obtained by the determining unit indicates that the level of the inter modulation distortion is equal to or greater than the regulation value, a level of a signal input to the amplifying unit.Type: GrantFiled: July 29, 2015Date of Patent: November 22, 2016Assignee: FUJITSU LIMITEDInventors: Mutsuhito Ota, Setsuya Nagaya, Shinichi Kawai, Yusuke Yamamori
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Publication number: 20160278028Abstract: A power adjustment method includes: measuring output power that is obtained when input power to be amplified in a linear region is input to a power amplifier configured to amplify input power linearly in the linear region and amplify input power nonlinearly in a nonlinear region; deriving a straight line connecting a measurement point corresponding to the measured output power and a boundary point between the linear region and the nonlinear region in a coordinate plane representing input/output characteristics; acquiring information on an approximate equation that is stored in advance in correspondence with the measured output power, the approximate equation representing a relation between input power and output power in the nonlinear region; and storing information on the derived straight line and the acquired information on the approximate equation in a semiconductor integrated circuit provided at a preceding stage of the power amplifier.Type: ApplicationFiled: May 29, 2016Publication date: September 22, 2016Applicant: FUJITSU LIMITEDInventors: NOBUHIDE HACHIYA, TAKASHI TANII, YASUHIRO MURAKAMI, Yusuke Yamamori, YASUAKI TAKEUCHI, MASAHIKO HIRAO, MANABU MURAKAMI, Mikio Hayashihara
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Patent number: 9300255Abstract: A radio communication circuit includes a power amplifier configured to amplify a signal and output the amplified signal, an envelope detector configured to extract an envelope of an input signal inputted to the power amplifier, an offset generator configured to generate an offset value for a power supply voltage to be applied to the power amplifier, based on a distortion amount in an output signal from the power amplifier, and a power supply voltage modulator configured to control the power supply voltage to be applied to the power amplifier based on the envelope extracted and the offset value generated.Type: GrantFiled: August 4, 2014Date of Patent: March 29, 2016Assignee: FUJITSU LIMITEDInventors: Yasuaki Takeuchi, Yusuke Yamamori, Yasuhiro Murakami, Takashi Tanii, Mikio Hayashihara
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Publication number: 20160080010Abstract: A wireless communication apparatus includes an amplifying unit that amplifies an input signal that includes signals with different frequencies of a first frequency and the second frequency; a measuring unit that measures a level of inter modulation distortion generated in a signal obtained by the input signal being amplified by the amplifying unit; a determining unit that determines whether the level of the inter modulation distortion measured by the measuring unit is equal to or greater than a regulation value that is previously stored; and a control unit that decreases, when a result of the determination obtained by the determining unit indicates that the level of the inter modulation distortion is equal to or greater than the regulation value, a level of a signal input to the amplifying unit.Type: ApplicationFiled: July 29, 2015Publication date: March 17, 2016Inventors: Mutsuhito OTA, Setsuya NAGAYA, Shinichi Kawai, Yusuke Yamamori
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Publication number: 20150050894Abstract: A radio communication device includes a semiconductor integrated circuit including a transmission path and a reception path; a determination unit that determines whether firmware used for processing in the semiconductor integrated circuit is updated; an input unit that inputs predetermined test data to the transmission path when it is determined that the firmware is updated; a measurement unit that measures a time until the test data returns from the reception path; and a processor that compares the measured time with a reference time, and adjusts a delay time of a signal based on a result of the comparison, wherein the semiconductor integrated circuit includes a bypass that connects the transmission path and the reception path to turn back the test data to the reception path at a stage prior to conversion of a frequency of the test data to the radio frequency.Type: ApplicationFiled: July 15, 2014Publication date: February 19, 2015Inventors: YASUHIRO MURAKAMI, YASUAKI TAKEUCHI, TAKASHI TANII, NOBUHIDE HACHIYA, Yusuke Yamamori
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Publication number: 20150048890Abstract: A radio communication circuit includes a power amplifier configured to amplify a signal and output the amplified signal, an envelope detector configured to extract an envelope of an input signal inputted to the power amplifier, an offset generator configured to generate an offset value for a power supply voltage to be applied to the power amplifier, based on a distortion amount in an output signal from the power amplifier, and a power supply voltage modulator configured to control the power supply voltage to be applied to the power amplifier based on the envelope extracted and the offset value generated.Type: ApplicationFiled: August 4, 2014Publication date: February 19, 2015Inventors: Yasuaki TAKEUCHI, Yusuke YAMAMORI, Yasuhiro MURAKAMI, Takashi TANII, Mikio HAYASHIHARA
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Publication number: 20140066079Abstract: A wireless terminal device includes a transmitter, a receiver, a memory, and a processor coupled to the memory, the processor being configured to measure a transmission processing time and a reception processing time, the transmission processing time being a time for the transmitter to carry out transmission processing, the reception processing time being a time for the receiver to carry out reception processing, and adjust a transmission timing of the transmitter on the basis of the transmission processing time and a reception timing of the receiver on the basis of the reception processing time.Type: ApplicationFiled: August 23, 2013Publication date: March 6, 2014Applicant: FUJITSU LIMITEDInventors: Yasuhiro MURAKAMI, Yusuke YAMAMORI, Yasuaki TAKEUCHI, Takashi TANII, Nobuhide HACHIYA
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Patent number: 4871146Abstract: A multifunction apparatus for the direct heat treatment of a medium- to high-carbon steel rod in a lower quench line and the treatment of low carbon steel in an upper quench line. A hot-rolled rod is transported on a conveyor in the form of a sequence of non-concentric rings, the conveyor, being operative between a first position in contact with the lower quench line and a second position in the upper cooling line. In the lower quench line the rod is subjected to controlled cooling in a coolant so that the greater part of any austenite in the entire length of the rod is substantially uniformly transformed to a fine pearlite structure. A heat holding vessel is operated under conditions that transforms any residual defects into pearlite.Type: GrantFiled: February 5, 1988Date of Patent: October 3, 1989Assignee: Sumitomo Electric Industries, Ltd.Inventors: Katsuhiko Yamada, Kunio Ojima, Takashi Asakura, Yusuke Yamamori, Yukihiro Nakamura
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Patent number: 4770722Abstract: A method and apparatus for the direct heat treatment of a medium- to high-carbon steel rod in which the formation of martensite is prevented, even if the starting billet contains segregation. A hot-rolled rod is transported on a conveyor in the form of a sequence of non-concentric rings. The rod is then subjected to controlled cooling in a coolant so that the greater part of any austenite in the entire length of the rod is substantially uniformly transformed to a fine pearlite structure. The sequence of non-concentric rings of the rod is next held at a temperature of 450.degree.-630.degree. C. for a period of 60-300 seconds, with the pitch between each ring being made smaller than at the inlet of the conveyor. Accordingly, a pearlite transformation is effected of any residual austenite.Type: GrantFiled: May 13, 1987Date of Patent: September 13, 1988Assignee: Sumimoto Electric Inductries, Ltd.Inventors: Katsuhiko Yamada, Kunio Ojima, Takashi Asakura, Yusuke Yamamori, Yukihiro Nakamura