Patents by Inventor Kenji Hamachi
Kenji Hamachi 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: 11892534Abstract: A frequency characteristic measurement apparatus includes a calibration circuit configured to perform a SOLT calibration on cable end surfaces, a first measurement circuit measuring S-parameters of a first substrate provided with a DUT, after the SOLT calibration by the calibration circuit, a second measurement circuit measuring S-parameters of a second substrate after the SOLT calibration by the calibration circuit, and an extraction circuit performing a vector operation of a measurement result of the first measurement circuit and a measurement result of the second measurement circuit to extract S-parameters of the DUT. The extraction circuit assumes that a reflection of each of first second fixtures obtained by virtually dividing the second substrate into two parts at the center, on an end surface of the second substrate is equal to or smaller than a reflection on an end surface of the second substrate without the virtual division at the center.Type: GrantFiled: March 22, 2022Date of Patent: February 6, 2024Assignee: ROHM Co., LTD.Inventor: Kenji Hamachi
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Publication number: 20230284385Abstract: Provided is a substrate including a first substrate including a first surface, and a second substrate including a second surface with an area smaller than the first surface and including a third surface with an area smaller than the first surface, the third surface facing the second surface, as viewed in a thickness direction of the first substrate, in which the first substrate includes a first signal line and a second signal line formed on the first surface, and the second substrate includes a first conductive portion formed on the second surface and able to come into contact with the first signal line, a second conductive portion formed on the second surface and able to come into contact with the second signal line, a third conductive portion and a fourth conductive portion formed on the third surface, a first conduction portion, and a second conduction portion.Type: ApplicationFiled: March 3, 2023Publication date: September 7, 2023Inventor: Kenji HAMACHI
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Patent number: 11742774Abstract: Disclosed are a switch driving device, in which individual zero voltage switching control of a first switch element and a second switch element forming a bidirectional switch is performed, and a switching power supply including a primary winding to which an alternating-current input voltage is applied, a secondary winding electromagnetically coupled to the primary winding, the bidirectional switch connected in series with the primary winding, a resonance capacitor connected in parallel with at least one of the bidirectional switch and the primary winding, a full-wave rectifier circuit that performs full-wave rectification of an induced voltage occurring in the secondary winding, a smoothing capacitor that smooths output of the full-wave rectifier circuit, and the switch driving device that drives the bidirectional switch.Type: GrantFiled: July 13, 2022Date of Patent: August 29, 2023Assignee: ROHM CO., LTD.Inventors: Kenji Hamachi, Akeyuki Komatsu
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Publication number: 20220399827Abstract: Provided is a switch driving apparatus including a controller configured to individually control a first switch element and a second switch element included in a bidirectional switch, in which, when the controller stops on/off drive of the bidirectional switch, the controller turns off both the first switch element and the second switch element and then temporarily turns on one of the first switch element and the second switch element for a predetermined on time period.Type: ApplicationFiled: April 7, 2022Publication date: December 15, 2022Inventor: Kenji HAMACHI
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Publication number: 20220345051Abstract: Disclosed are a switch driving device, in which individual zero voltage switching control of a first switch element and a second switch element forming a bidirectional switch is performed, and a switching power supply including a primary winding to which an alternating-current input voltage is applied, a secondary winding electromagnetically coupled to the primary winding, the bidirectional switch connected in series with the primary winding, a resonance capacitor connected in parallel with at least one of the bidirectional switch and the primary winding, a full-wave rectifier circuit that performs full-wave rectification of an induced voltage occurring in the secondary winding, a smoothing capacitor that smooths output of the full-wave rectifier circuit, and the switch driving device that drives the bidirectional switch.Type: ApplicationFiled: July 13, 2022Publication date: October 27, 2022Inventors: KENJI HAMACHI, AKEYUKI KOMATSU
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Publication number: 20220317226Abstract: A frequency characteristic measurement apparatus includes a calibration circuit configured to perform a SOLT calibration on cable end surfaces, a first measurement circuit measuring S-parameters of a first substrate provided with a DUT, after the SOLT calibration by the calibration circuit, a second measurement circuit measuring S-parameters of a second substrate after the SOLT calibration by the calibration circuit, and an extraction circuit performing a vector operation of a measurement result of the first measurement circuit and a measurement result of the second measurement circuit to extract S-parameters of the DUT. The extraction circuit assumes that a reflection of each of first second fixtures obtained by virtually dividing the second substrate into two parts at the center, on an end surface of the second substrate is equal to or smaller than a reflection on an end surface of the second substrate without the virtual division at the center.Type: ApplicationFiled: March 22, 2022Publication date: October 6, 2022Inventor: Kenji HAMACHI
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Patent number: 11424691Abstract: Disclosed are a switch driving device, in which individual zero voltage switching control of a first switch element and a second switch element forming a bidirectional switch is performed, and a switching power supply including a primary winding to which an alternating-current input voltage is applied, a secondary winding electromagnetically coupled to the primary winding, the bidirectional switch connected in series with the primary winding, a resonance capacitor connected in parallel with at least one of the bidirectional switch and the primary winding, a full-wave rectifier circuit that performs full-wave rectification of an induced voltage occurring in the secondary winding, a smoothing capacitor that smooths output of the full-wave rectifier circuit, and the switch driving device that drives the bidirectional switch.Type: GrantFiled: June 29, 2020Date of Patent: August 23, 2022Assignee: ROHM Co., LTD.Inventors: Kenji Hamachi, Akeyuki Komatsu
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Patent number: 11356029Abstract: Disclosed are a rectifying circuit and a switched-mode power supply. The rectifying circuit includes a first rectifying section for rectifying a positive induced voltage generated across a secondary winding of a transformer, a second rectifying section for rectifying a negative induced voltage generated across the secondary winding, and an inductance section connected between the first rectifying section and the second rectifying section. The switched-mode power supply includes a transformer having a primary winding and a secondary winding, a drive circuit for switchingly driving the primary winding of the transformer, and the rectifying circuit connected to the secondary winding of the transformer.Type: GrantFiled: June 30, 2020Date of Patent: June 7, 2022Assignee: ROHM Co., LTD.Inventors: Kenji Hamachi, Akeyuki Komatsu
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Publication number: 20210006148Abstract: Disclosed are a switch driving device, in which individual zero voltage switching control of a first switch element and a second switch element forming a bidirectional switch is performed, and a switching power supply including a primary winding to which an alternating-current input voltage is applied, a secondary winding electromagnetically coupled to the primary winding, the bidirectional switch connected in series with the primary winding, a resonance capacitor connected in parallel with at least one of the bidirectional switch and the primary winding, a full-wave rectifier circuit that performs full-wave rectification of an induced voltage occurring in the secondary winding, a smoothing capacitor that smooths output of the full-wave rectifier circuit, and the switch driving device that drives the bidirectional switch.Type: ApplicationFiled: June 29, 2020Publication date: January 7, 2021Inventors: Kenji HAMACHI, Akeyuki KOMATSU
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Publication number: 20210006173Abstract: Disclosed are a rectifying circuit and a switched-mode power supply. The rectifying circuit includes a first rectifying section for rectifying a positive induced voltage generated across a secondary winding of a transformer, a second rectifying section for rectifying a negative induced voltage generated across the secondary winding, and an inductance section connected between the first rectifying section and the second rectifying section. The switched-mode power supply includes a transformer having a primary winding and a secondary winding, a drive circuit for switchingly driving the primary winding of the transformer, and the rectifying circuit connected to the secondary winding of the transformer.Type: ApplicationFiled: June 30, 2020Publication date: January 7, 2021Applicant: ROHM Co., LTD.Inventors: Kenji HAMACHI, Akeyuki KOMATSU
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Patent number: 9267940Abstract: The present invention provides a disc-like assay chip, and more specifically, the present invention provides an assay chip which can effectively clean a cleaned object existing in a fluid loop, and can be appropriately applied to a detection method of a reaction system using a step of necessarily cleaning the cleaned object, such as an immunofluorescent antibody method, and applied to a detection method using an enzymatic reaction (especially, an ELISA method). The present invention further provides a disc-like assay chip which is mounted on a centrifugal device such as a rotational disc and can perform detection or quantitation on a target substance through optical measurement after a specimen and a reagent react by use of a centrifugal force generated by rotation of the centrifugal device.Type: GrantFiled: March 10, 2015Date of Patent: February 23, 2016Assignee: Rohm Co., Ltd.Inventors: Keiji Iwamoto, Kazuhiro Oguchi, Kenji Hamachi
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Publication number: 20150226730Abstract: The present invention provides a disc-like assay chip, and more specifically, the present invention provides an assay chip which can effectively clean a cleaned object existing in a fluid loop, and can be appropriately applied to a detection method of a reaction system using a step of necessarily cleaning the cleaned object, such as an immunofluorescent antibody method, and applied to a detection method using an enzymatic reaction (especially, an ELISA method). The present invention further provides a disc-like assay chip which is mounted on a centrifugal device such as a rotational disc and can perform detection or quantitation on a target substance through optical measurement after a specimen and a reagent react by use of a centrifugal force generated by rotation of the centrifugal device.Type: ApplicationFiled: March 10, 2015Publication date: August 13, 2015Inventors: Keiji Iwamoto, Kazuhiro Oguchi, Kenji Hamachi
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Patent number: 9005547Abstract: The present invention provides a disc-like assay chip, and more specifically, the present invention provides an assay chip which can effectively clean a cleaned object existing in a fluid loop, and can be appropriately applied to a detection method of a reaction system using a step of necessarily cleaning the cleaned object, such as an immunofluorescent antibody method, and applied to a detection method using an enzymatic reaction (especially, an ELISA method). The present invention further provides a disc-like assay chip which is mounted on a centrifugal device such as a rotational disc and can perform detection or quantitation on a target substance through optical measurement after a specimen and a reagent react by use of a centrifugal force generated by rotation of the centrifugal device.Type: GrantFiled: March 23, 2012Date of Patent: April 14, 2015Assignee: Rohm Co., Ltd.Inventors: Keiji Iwamoto, Kazuhiro Oguchi, Kenji Hamachi
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Patent number: 8900528Abstract: A disc-shaped analysis chip has an internal space. The internal space includes: a first reservoir for accommodating a first liquid; a second reservoir and a third reservoir arranged nearer to an outer peripheral portion of the analysis chip than the first reservoir; a fourth reservoir, a fifth reservoir and a sixth reservoir for accommodating a second liquid, a third liquid and a fourth liquid, respectively, and being arranged nearer to the outer peripheral portion of the analysis chip than the second and the third reservoir; a seventh reservoir arranged nearer to the outer peripheral portion of the analysis chip than the fourth to the sixth reservoir; an eighth reservoir arranged nearer to the outer peripheral portion of the analysis chip than the seventh reservoir; and a first to an eighth flow path for appropriately interconnecting the first to the eighth reservoir.Type: GrantFiled: July 27, 2012Date of Patent: December 2, 2014Assignee: Rohm Co., Ltd.Inventors: Kenji Hamachi, Keiji Iwamoto, Kazuhiro Oguchi
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Publication number: 20140314636Abstract: There is provided a microchip including a fluid circuit composed of a space formed inside, and causing a liquid present in the fluid circuit to move within the fluid circuit by application of centrifugal force, the microchip including: an opening provided in a surface of the microchip and connected to the fluid circuit; a lid portion for opening and closing the opening; and a specimen take-in portion provided at the lid portion or in the opening, for taking in a specimen.Type: ApplicationFiled: April 14, 2014Publication date: October 23, 2014Applicant: ROHM CO., LTD.Inventors: Shun Momose, Kenji Hamachi, Naoyuki Usagawa, Xin Wang, Hiroki Takeuchi, Yuki Shiritani, Tetsuya Ooka
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Publication number: 20130029361Abstract: A disc-shaped analysis chip has an internal space. The internal space includes: a first reservoir for accommodating a first liquid; a second reservoir and a third reservoir arranged nearer to an outer peripheral portion of the analysis chip than the first reservoir; a fourth reservoir, a fifth reservoir and a sixth reservoir for accommodating a second liquid, a third liquid and a fourth liquid, respectively, and being arranged nearer to the outer peripheral portion of the analysis chip than the second and the third reservoir; a seventh reservoir arranged nearer to the outer peripheral portion of the analysis chip than the fourth to the sixth reservoir; an eighth reservoir arranged nearer to the outer peripheral portion of the analysis chip than the seventh reservoir; and a first to an eighth flow path for appropriately interconnecting the first to the eighth reservoir.Type: ApplicationFiled: July 27, 2012Publication date: January 31, 2013Applicant: ROHM CO., LTD.Inventors: Kenji HAMACHI, Keiji IWAMOTO, Kazuhiro OGUCHI
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Publication number: 20120244607Abstract: The present invention provides a disc-like assay chip, and more specifically, the present invention provides an assay chip which can effectively clean a cleaned object existing in a fluid loop, and can be appropriately applied to a detection method of a reaction system using a step of necessarily cleaning the cleaned object, such as an immunofluorescent antibody method, and applied to a detection method using an enzymatic reaction (especially, an ELISA method). The present invention further provides a disc-like assay chip which is mounted on a centrifugal device such as a rotational disc and can perform detection or quantitation on a target substance through optical measurement after a specimen and a reagent react by use of a centrifugal force generated by rotation of the centrifugal device.Type: ApplicationFiled: March 23, 2012Publication date: September 27, 2012Applicant: ROHM CO., LTD.Inventors: Keiji Iwamoto, Kazuhiro Oguchi, Kenji Hamachi