Patents by Inventor Daisuke Matsuoka

Daisuke Matsuoka 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).

  • Publication number: 20210242845
    Abstract: A differential amplifier is provided, in which generation of unnecessary harmonic distortion in the differential output signal is suppressed. A common mode feedback circuit increases or decreases operating points of an inverting output terminal and a non-inverting output terminal such that an intermediate voltage of voltages respectively provided to an inverting input terminal and a non-inverting input terminal is consistent with to a reference voltage. Variations in voltage at the inverting input terminal and the non-inverting input terminal are suppressed, variations in electrical properties of elements connected to the input terminals are suppressed. Therefore, it is possible to suppress generation of harmonic distortion in the output signals from the inverting output terminal and the non-inverting output terminal.
    Type: Application
    Filed: January 27, 2021
    Publication date: August 5, 2021
    Applicant: Asahi Kasei Microdevices Corporation
    Inventor: Daisuke MATSUOKA
  • Patent number: 10666278
    Abstract: To reduce distortion of output analog signals generated at a current-output DA converter. A DA converter that outputs a differential analog signal corresponding to an input digital signal is provided, including: a current output unit outputting a current corresponding to the digital signal to each of first and second wires; a converting unit outputting, as positive-side and negative-side analog signals, voltage signals based on currents flowing through the first and second wires, respectively; a first noise reducing unit having: a first switch switched to be or not to be electrically connected with the first wire; and a first buffer provided between the first switch and a reference potential; and a second noise reducing unit having: a second switch switched to be or not to be electrically connected with the second wire; and a second buffer provided between the second switch and the reference potential.
    Type: Grant
    Filed: March 14, 2019
    Date of Patent: May 26, 2020
    Assignee: Asahi Kasei Microdevices Corporation
    Inventors: Daisuke Matsuoka, Ryuzo Yamamoto, Tatsuya Chubachi
  • Publication number: 20190288701
    Abstract: To reduce distortion of output analog signals generated at a current-output DA converter. A DA converter that outputs a differential analog signal corresponding to an input digital signal is provided, including: a current output unit outputting a current corresponding to the digital signal to each of first and second wires; a converting unit outputting, as positive-side and negative-side analog signals, voltage signals based on currents flowing through the first and second wires, respectively; a first noise reducing unit having: a first switch switched to be or not to be electrically connected with the first wire; and a first buffer provided between the first switch and a reference potential; and a second noise reducing unit having: a second switch switched to be or not to be electrically connected with the second wire; and a second buffer provided between the second switch and the reference potential.
    Type: Application
    Filed: March 14, 2019
    Publication date: September 19, 2019
    Inventors: Daisuke MATSUOKA, Ryuzo YAMAMOTO, Tatsuya CHUBACHI
  • Patent number: 9941270
    Abstract: A semiconductor device includes a semiconductor substrate having a predetermined region in which a standard cell is disposed, and also includes: a first circuit connected to a first ground power line; a second circuit that is connected to a second ground power line and formed from the standard cells; and a protection circuit interposed and connected between the first circuit and the second circuit. The protection circuit includes: a resistor connected in series between the first circuit and the second circuit; and a protector that is interposed and connected between a node of the resistor on the second circuit side and the second ground power line and clamps a potential difference between the node and the second ground power line to a predetermined voltage or lower. The protection circuit is formed in a protection cell disposed in the predetermined region.
    Type: Grant
    Filed: July 3, 2017
    Date of Patent: April 10, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kazuyuki Nakanishi, Daisuke Matsuoka
  • Publication number: 20170301665
    Abstract: A semiconductor device includes a semiconductor substrate having a predetermined region in which a standard cell is disposed, and also includes: a first circuit connected to a first ground power line; a second circuit that is connected to a second ground power line and formed from the standard cells; and a protection circuit interposed and connected between the first circuit and the second circuit. The protection circuit includes: a resistor connected in series between the first circuit and the second circuit; and a protector that is interposed and connected between a node of the resistor on the second circuit side and the second ground power line and clamps a potential difference between the node and the second ground power line to a predetermined voltage or lower. The protection circuit is formed in a protection cell disposed in the predetermined region.
    Type: Application
    Filed: July 3, 2017
    Publication date: October 19, 2017
    Inventors: Kazuyuki NAKANISHI, Daisuke MATSUOKA
  • Patent number: 9755588
    Abstract: An object is to output output signal amplitude exceeding power supply voltage or output signal amplitude falling below ground voltage without requiring a charge pump circuit or the like to generate positive or negative power supply voltage for an operational amplifier. The present invention provides a signal output circuit comprising an operational amplifier including: an amplification stage configured to amplify differential input voltage; and an output stage configured to amplify an input signal amplified by the amplification stage and output the input signal as an output signal, wherein the output stage is a switched capacitor circuit which includes switches and a capacitor configured to sample differential voltage between input voltage outputted from the amplification stage and voltage other than the input voltage and which transfers the differential voltage sampled by the capacitor by switching of the switches based on the input voltage.
    Type: Grant
    Filed: March 27, 2014
    Date of Patent: September 5, 2017
    Assignee: Asahi Kasei Microdevices Corporation
    Inventor: Daisuke Matsuoka
  • Patent number: 9694852
    Abstract: The vehicle stop control device includes a normal-state turning control unit to output, to turning devices, a turning amount command value defined by a steering amount signal inputted from steering input device to input steering angles of wheels, and a stopped-state turning control unit to detect a vehicle speed based on a rotation angle signal outputted from a rotation angle sensor, and to, when the detected vehicle speed is less than or equal to a threshold and an accelerator input value is less than or equal to a threshold, perform hill hold of a vehicle capable of independently turning all wheels with the turning device 4 of one or more of the wheels turning the corresponding wheel toward a toe-in or toe-out side by an amount greater than the turning amount command value from the normal-state turning control unit.
    Type: Grant
    Filed: October 5, 2015
    Date of Patent: July 4, 2017
    Assignee: NTN CORPORATION
    Inventor: Daisuke Matsuoka
  • Patent number: 9676410
    Abstract: A vehicle stop control device is provided which prevents, when a traveling mode is switched, unintended movement of a vehicle in which all wheels are capable of being independently turned, and which can travel in a non-normal mode. Provided is: traveling mode switching section which can switch among a lateral movement mode, a pinwheeling mode, a normal traveling mode, and a parking mode, as a control mode for selecting operation combined by turning devices and traveling drive mechanisms; and turning timing shift part configured to shift the timing for turning at least one of all the wheels relative to the timing for turning the other ones of the wheels at the time of mode switching by the traveling mode switching section.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: June 13, 2017
    Assignee: NTN CORPORATION
    Inventor: Daisuke Matsuoka
  • Patent number: 9479154
    Abstract: A semiconductor integrated circuit includes a power supply switch circuit which uses a PMOS transistor and an NMOS transistor to select a first power supply voltage applied to a first power supply input terminal or a second power supply voltage applied to a second power supply input terminal, and output the selected voltage as a power supply voltage to a third power supply output terminal, a first switch control circuit connected to the gate of the PMOS transistor, and a second switch control circuit connected to the gate of the NMOS transistor.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: October 25, 2016
    Assignee: Panasonic Intellectual Property Management Co., Ltd.
    Inventors: Daisuke Matsuoka, Masahiro Gion, Shiro Usami
  • Patent number: 9401602
    Abstract: An ESD protection circuit includes a resistive element, a capacitive element, a protecting element, and a controller. The resistive element, the protecting element, and the controller are provided in an element formation layer. At least part of the capacitive element includes an interconnect capacitor provided in a plurality of interconnect layers. When viewed in plan, at least part of a capacitance formation region in which the interconnect capacitor is provided overlaps at least part of an element formation region in which the resistive element, the protecting element, and the controller are provided.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: July 26, 2016
    Assignee: SOCIONEXT INC.
    Inventor: Daisuke Matsuoka
  • Publication number: 20160179713
    Abstract: Provided is a semiconductor integrated circuit capable of reducing power consumption while continuously detecting presence of connection of a device. The semiconductor integrated circuit includes: a first pad including a detection pad and a communication pad; a plurality of IO cells each having a high-withstand voltage device which receives a voltage of the detection pad and the communication pad, and a low-withstand voltage device which outputs a voltage obtained after the voltage is stepped down. Furthermore, the semiconductor integrated circuit includes a main circuit capable of detecting the connection of the device based on a voltage output from the IO cell connected to the detection pad, and performing data communication with the device; and a sub-circuit that is connected to the high-withstand voltage device included in the IO cell connected to the detection pad, and detects the connection of the device based on a voltage of the detection pad.
    Type: Application
    Filed: February 25, 2016
    Publication date: June 23, 2016
    Inventors: DAISUKE MATSUOKA, TETSURO YOSHIMOTO
  • Publication number: 20160068183
    Abstract: A vehicle stop control device is provided which prevents, when a traveling mode is switched, unintended movement of a vehicle in which all wheels are capable of being independently turned, and which can travel in a non-normal mode. Provided is: traveling mode switching section which can switch among a lateral movement mode, a pinwheeling mode, a normal traveling mode, and a parking mode, as a control mode for selecting operation combined by turning devices and traveling drive mechanisms; and turning timing shift part configured to shift the timing for turning at least one of all the wheels relative to the timing for turning the other ones of the wheels at the time of mode switching by the traveling mode switching section.
    Type: Application
    Filed: November 19, 2015
    Publication date: March 10, 2016
    Applicant: NTN CORPORATION
    Inventor: Daisuke MATSUOKA
  • Publication number: 20160056775
    Abstract: An object is to output output signal amplitude exceeding power supply voltage or output signal amplitude falling below ground voltage without requiring a charge pump circuit or the like to generate positive or negative power supply voltage for an operational amplifier. The present invention provides a signal output circuit comprising an operational amplifier including: an amplification stage configured to amplify differential input voltage; and an output stage configured to amplify an input signal amplified by the amplification stage and output the input signal as an output signal, wherein the output stage is a switched capacitor circuit which includes switches and a capacitor configured to sample differential voltage between input voltage outputted from the amplification stage and voltage other than the input voltage and which transfers the differential voltage sampled in the capacitor by switching of the switches based on the input voltage.
    Type: Application
    Filed: March 27, 2014
    Publication date: February 25, 2016
    Applicant: ASAHI KASEI MICRODEVICES CORPORATION
    Inventor: Daisuke MATSUOKA
  • Publication number: 20160023679
    Abstract: The vehicle stop control device includes a normal-state turning control unit to output, to turning devices, a turning amount command value defined by a steering amount signal inputted from steering input device to input steering angles of wheels, and a stopped-state turning control unit to detect a vehicle speed based on a rotation angle signal outputted from a rotation angle sensor, and to, when the detected vehicle speed is less than or equal to a threshold and an accelerator input value is less than or equal to a threshold, perform hill hold of a vehicle capable of independently turning all wheels with the turning device 4 of one or more of the wheels turning the corresponding wheel toward a toe-in or toe-out side by an amount greater than the turning amount command value from the normal-state turning control unit.
    Type: Application
    Filed: October 5, 2015
    Publication date: January 28, 2016
    Applicant: NTN CORPORATION
    Inventor: Daisuke MATSUOKA
  • Publication number: 20150171858
    Abstract: A semiconductor integrated circuit includes a power supply switch circuit which uses a PMOS transistor and an NMOS transistor to select a first power supply voltage applied to a first power supply input terminal or a second power supply voltage applied to a second power supply input terminal, and output the selected voltage as a power supply voltage to a third power supply output terminal, a first switch control circuit connected to the gate of the PMOS transistor, and a second switch control circuit connected to the gate of the NMOS transistor.
    Type: Application
    Filed: February 26, 2015
    Publication date: June 18, 2015
    Inventors: Daisuke MATSUOKA, Masahiro GION, Shiro USAMI
  • Publication number: 20140211357
    Abstract: An ESD protection circuit includes a resistive element, a capacitive element, a protecting element, and a controller. The resistive element, the protecting element, and the controller are provided in an element formation layer. At least part of the capacitive element includes an interconnect capacitor provided in a plurality of interconnect layers. When viewed in plan, at least part of a capacitance formation region in which the interconnect capacitor is provided overlaps at least part of an element formation region in which the resistive element, the protecting element, and the controller are provided.
    Type: Application
    Filed: April 2, 2014
    Publication date: July 31, 2014
    Applicant: PANASONIC CORPORATION
    Inventor: Daisuke MATSUOKA
  • Patent number: 8690184
    Abstract: A back plate 7 is provided to a backside of a case 8 which accommodates an airbag 11 of an airbag module 5 to reduce the deformation of the case 8 toward a back side in the event of airbag deployment. The back plate 7 is supported on a steering member or the case 8, and an upper portion of the back plate 7 is held on a back support 19 protruding from the instrument panel 1.
    Type: Grant
    Filed: September 10, 2012
    Date of Patent: April 8, 2014
    Assignees: DaikyoNishikawa Corporation, Mazda Motor Corporation
    Inventors: Toshiteru Yoshimura, Tsuyoshi Shimono, Daisuke Matsuoka, Yamehito Tamura, Koji Kuwabara, Masayoshi Ono, Hiroyuki Kawai, Kazuhiro Tanaka
  • Publication number: 20130207717
    Abstract: A charge pump circuit according to the present invention includes a plurality of charge pump units each including a capacitor and connected to each other in parallel; a current source connected to commonly connected power source terminals of the plurality of charge pump units; and a control circuit connected to commonly connected output terminals and controlling an amount of a current to be supplied by the current source to the commonly connected power source terminals based on an output signal at the output terminals output signal from the plurality of charge pump units. Always in at least one charge pump unit, a current from the current source via the power source terminal is supplied to the capacitor. A spike noise due to a change in current is not generated and characteristics degradation of the other circuit can be prevented.
    Type: Application
    Filed: February 13, 2013
    Publication date: August 15, 2013
    Applicant: Asahi Kasei Microdevices Corporation
    Inventor: Daisuke Matsuoka
  • Publication number: 20130113526
    Abstract: A control signal generation circuit which generates a control signal for controlling a gate of an MOS transistor, comprises a first switching part connected to a current source and the gate and controlled based on an input signal; and a second switching part connected to the current source and the gate and controlled based on an input signal and control signal, wherein a voltage value of the control signal changes based on the input signal, and a slant of the voltage value with respect to time is switched to become smaller after the voltage value exceeds a threshold voltage of the MOS transistor compared with when the voltage value equals to or less than the threshold voltage of the MOS transistor.
    Type: Application
    Filed: March 28, 2012
    Publication date: May 9, 2013
    Applicant: ASAHI KASEI MICRODEVICES CORPORATION
    Inventors: Daisuke Matsuoka, Ryuzo Yamamoto
  • Publication number: 20130076010
    Abstract: A back plate 7 is provided to a backside of a case 8 which accommodates an airbag 11 of an airbag module 5 to reduce the deformation of the case 8 toward a back side in the event of airbag deployment. The back plate 7 is supported on a steering member or the case 8, and an upper portion of the back plate 7 is held on a back support 19 protruding from the instrument panel 1.
    Type: Application
    Filed: September 10, 2012
    Publication date: March 28, 2013
    Applicants: MAZDA MOTOR CORPORATION, DAIKYONISHIKAWA CORPORATION
    Inventors: Toshiteru YOSHIMURA, Tsuyoshi SHIMONO, Daisuke MATSUOKA, Yumehito TAMURA, Koji KUWABARA, Masayoshi ONO, Hiroyuki KAWAI, Kazuhiro TANAKA