Patents by Inventor Masayuki Hosoda
Masayuki Hosoda 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: 11218117Abstract: An amplifier circuit includes: a plurality of amplifiers; a plurality of monitor elements provided for each of the plurality of amplifiers and disposed on a same chip with the corresponding amplifier; and a processor configured to: measure characteristics of each of the plurality of monitor elements; reduce a difference in distortion between a plurality of signals output from the plurality of amplifiers based on the measured characteristics; and compensate for the distortion.Type: GrantFiled: October 22, 2019Date of Patent: January 4, 2022Assignee: FUJITSU LIMITEDInventors: Masayuki Hosoda, Yoichi Kawano, Alexander Nikolaevich Lozhkin
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Patent number: 11075606Abstract: A power amplifier circuit includes a plurality of amplifiers, a detector configured to detect distortion characteristics of each of the plurality of amplifiers, a control circuit configured to control a bias voltage to be applied to at least one amplifier of the plurality of amplifiers so that the distortion characteristics of each of the plurality of amplifiers detected by the detector are matched, and a distortion compensator configured to perform distortion compensation for the plurality of amplifiers, based on the distortion characteristics of each of the plurality of amplifiers detected by the detector.Type: GrantFiled: February 4, 2020Date of Patent: July 27, 2021Assignee: FUJITSU LIMITEDInventor: Masayuki Hosoda
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Publication number: 20200266772Abstract: A power amplifier circuit includes a plurality of amplifiers, a detector configured to detect distortion characteristics of each of the plurality of amplifiers, a control circuit configured to control a bias voltage to be applied to at least one amplifier of the plurality of amplifiers so that the distortion characteristics of each of the plurality of amplifiers detected by the detector are matched, and a distortion compensator configured to perform distortion compensation for the plurality of amplifiers, based on the distortion characteristics of each of the plurality of amplifiers detected by the detector.Type: ApplicationFiled: February 4, 2020Publication date: August 20, 2020Applicant: FUJITSU LIMITEDInventor: Masayuki Hosoda
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Publication number: 20200136568Abstract: An amplifier circuit includes: a plurality of amplifiers; a plurality of monitor elements provided for each of the plurality of amplifiers and disposed on a same chip with the corresponding amplifier; and a processor configured to: measure characteristics of each of the plurality of monitor elements; reduce a difference in distortion between a plurality of signals output from the plurality of amplifiers based on the measured characteristics; and compensate for the distortion.Type: ApplicationFiled: October 22, 2019Publication date: April 30, 2020Applicant: FUJITSU LIMITEDInventors: Masayuki Hosoda, Yoichi Kawano, Alexander Nikolaevich LOZHKIN
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Patent number: 10270406Abstract: A power amplifier includes a main amplifier, an auxiliary amplifier, and a control circuit. The main amplifier is configured to amplify input power, and the auxiliary amplifier is configured to amplify the input power when the input power exceeds a certain level. The control circuit, which is provided between a source of the main amplifier and a ground, is configured to control a source potential of the main amplifier so as to increase the source potential when the input power reaches at least a certain value.Type: GrantFiled: July 12, 2017Date of Patent: April 23, 2019Assignee: FUJITSU LIMITEDInventors: Masato Nishimori, Tatsuya Hirose, Ikuo Soga, Masayuki Hosoda, Tadahiro Imada
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Publication number: 20180041177Abstract: A power amplifier includes a main amplifier, an auxiliary amplifier, and a control circuit. The main amplifier is configured to amplify input power, and the auxiliary amplifier is configured to amplify the input power when the input power exceeds a certain level. The control circuit, which is provided between a source of the main amplifier and a ground, is configured to control a source potential of the main amplifier so as to increase the source potential when the input power reaches at least a certain value.Type: ApplicationFiled: July 12, 2017Publication date: February 8, 2018Applicant: FUJITSU LIMITEDInventors: Masato Nishimori, Tatsuya Hirose, Ikuo Soga, Masayuki Hosoda, Tadahiro Imada
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Patent number: 9681235Abstract: A vibration detection component includes a diaphragm that has a light transparency; alight emitting element that emits light into the diaphragm at a certain inclination angle relative to a normal direction of the diaphragm; and a light receiving element that receives the light emitted from the light emitting element and reflected by an interface between the diaphragm and a medium in contact with the diaphragm and converts the light into an electric signal related to vibration of the diaphragm.Type: GrantFiled: September 18, 2015Date of Patent: June 13, 2017Assignee: FUJITSU LIMITEDInventor: Masayuki Hosoda
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Publication number: 20160094926Abstract: A vibration detection component includes a diaphragm that has a light transparency; alight emitting element that emits light into the diaphragm at a certain inclination angle relative to a normal direction of the diaphragm; and a light receiving element that receives the light emitted from the light emitting element and reflected by an interface between the diaphragm and a medium in contact with the diaphragm and converts the light into an electric signal related to vibration of the diaphragm.Type: ApplicationFiled: September 18, 2015Publication date: March 31, 2016Applicant: FUJITSU LIMITEDInventor: Masayuki Hosoda
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Patent number: 7222536Abstract: A semiconductor acceleration sensor is disclosed which has a small difference in acceleration detection sensitivity among X, Y, and Z axes and a high detection sensitivity. The acceleration sensor has a mass portion in its center, a support frame surrounding the mass portion, and a plurality of flexible arms connecting the mass portion and the support frame. The flexible arm has wider portions on both ends and a narrower portion between the wider portions. Piezo resistors are restrictedly provided within a top surface region of the wider portion of the flexible arm, and through holes connecting metal wires and the piezo resistors are disposed on the mass portion/support frame. The plurality of flexible arms are symmetric with respect to the center of the mass portion, and each of the flexible arms is symmetric with respect to the center line of the flexible arm.Type: GrantFiled: September 29, 2005Date of Patent: May 29, 2007Assignee: Hitachi Metals, Ltd.Inventors: Yoshio Ikeda, Masayuki Hosoda, Isao Sakaguchi, Masakatsu Saitoh
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Publication number: 20060065054Abstract: A semiconductor acceleration sensor is disclosed which has a small difference in acceleration detection sensitivity among X, Y, and Z axes and a high detection sensitivity. The acceleration sensor has a mass portion in its center, a support frame surrounding the mass portion, and a plurality of flexible arms connecting the mass portion and the support frame. The flexible arm has wider portions on both ends and a narrower portion between the wider portions. Piezo resistors are restrictedly provided within a top surface region of the wider portion of the flexible arm, and through holes connecting metal wires and the piezo resistors are disposed on the mass portion/support frame. The plurality of flexible arms are symmetric with respect to the center of the mass portion, and each of the flexible arms is symmetric with respect to the center line of the flexible arm.Type: ApplicationFiled: September 29, 2005Publication date: March 30, 2006Inventors: Yoshio Ikeda, Masayuki Hosoda, Isao Sakaguchi, Masakatsu Saitoh
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Patent number: 5569268Abstract: An endoscopic ligating instrument has an outer tube having a rear end in which the tip end of an endoscope is mounted. An inner tube with a trip wire connected thereto is axially movably inserted in the outer tube. When the inner tube is moved rearwardly, the inner tube is urged to move forwardly by a spring. Three ligating O-rings are mounted respectively at axially equally spaced positions on the outer circumferential surface of a portion of the inner tube which projects from the outer tube. Four arms extending forwardly from the outer tube are disposed respectively at circumferentially equally spaced positions over the outer circumferential surface of the inner tube. Each of the arms has teeth disposed behind the ligating O-rings, respectively, and having front pushing surfaces for pushing the ligating O-rings forwardly when the inner tube is moved rearwardly and rear slant surfaces for riding over the ligating O-rings and spreading the arms radially outwardly when the inner tube is moved forwardly.Type: GrantFiled: February 15, 1995Date of Patent: October 29, 1996Assignee: Kabushiki Kaisha TopInventor: Masayuki Hosoda
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Patent number: 5499153Abstract: A magnetic head device having a slider attached to a holding member. A recessed groove is formed in the holding member near the trailing edge of the slider. That part of the holding member which is closer to the leading edge than the recessed groove is attached to the back of the slider. For securing the magnetic head, a coating material, such as IPA, is applied to a portion of the trailing edge of the slider. The slider is then attached to the holding member by an adhesive. Thereafter, the IPA is removed by cleaning to form a clearance.Type: GrantFiled: June 9, 1994Date of Patent: March 12, 1996Assignee: Hitachi Metals, Ltd.Inventors: Norio Uemura, Akira Taguchi, Masayuki Hosoda