Patents by Inventor Yoshimitsu Yanagawa

Yoshimitsu Yanagawa 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).

  • Patent number: 10720418
    Abstract: A resistance circuit is configured such that a P-type resistance section and an N-type resistance section are electrically connected in series, the P-type resistance section is configured with P-type diffusion layer resistance elements that are disposed to form a right angle with respect to each other and that are electrically connected in series, and the N-type resistance section is configured with N-type diffusion layer resistance elements that are disposed to form the right angle with respect to each other and that are electrically connected in series. Furthermore, the P-type diffusion layer resistance element is disposed along a <100> orientation direction of a semiconductor substrate, and the N-type diffusion layer resistance element is disposed along a <110> orientation direction of the semiconductor substrate. It is thereby possible to provide the resistance circuit, an oscillation circuit, and an in-vehicle sensor apparatus that reduce stress-induced characteristic fluctuations.
    Type: Grant
    Filed: September 12, 2017
    Date of Patent: July 21, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS LTD.
    Inventors: Yoshimitsu Yanagawa, Yoshikazu Nara, Masahiro Matsumoto, Hiroshi Nakano, Akira Kotabe
  • Patent number: 10676050
    Abstract: In a sensor device 1 according to the present invention, power is supplied from a control device 10 to a power supply terminal 7 and a ground terminal 9 of the sensor device 1 via a power supply line Vcc and a ground line Gnd, respectively, and a sensor output voltage is sent from a sensor output terminal 8 to the control device 10 via a sensor output line Vout. The control device 10 has disposed therein a constant voltage source 11 that supplies a constant voltage to the sensor device 1, and a pull-up resistor 12 connected between the sensor output line Vout and the constant voltage source 11.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: June 9, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Masahiro Matsumoto, Hiroshi Nakano, Yoshimitsu Yanagawa
  • Patent number: 10615076
    Abstract: A semiconductor chip having a pad, a protective element, and an internal circuit for providing a semiconductor chip having a protective circuit with high noise resistance, wherein the semiconductor chip is characterized in that the resistance value of metal wiring on a path reaching the pad and the protective element is higher than the resistance value of the protective element.
    Type: Grant
    Filed: March 25, 2016
    Date of Patent: April 7, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yoshimitsu Yanagawa, Masahiro Matsumoto, Hiroshi Nakano, Akira Kotabe, Satoshi Asano
  • Publication number: 20200013769
    Abstract: A resistance circuit is configured such that a P-type resistance section and an N-type resistance section are electrically connected in series, the P-type resistance section is configured with P-type diffusion layer resistance elements that are disposed to form a right angle with respect to each other and that are electrically connected in series, and the N-type resistance section is configured with N-type diffusion layer resistance elements that are disposed to form the right angle with respect to each other and that are electrically connected in series. Furthermore, the P-type diffusion layer resistance element is disposed along a <100> orientation direction of a semiconductor substrate, and the N-type diffusion layer resistance element is disposed along a <110> orientation direction of the semiconductor substrate. It is thereby possible to provide the resistance circuit, an oscillation circuit, and an in-vehicle sensor apparatus that reduce stress-induced characteristic fluctuations.
    Type: Application
    Filed: September 12, 2017
    Publication date: January 9, 2020
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Yoshimitsu YANAGAWA, Yoshikazu NARA, Masahiro MATSUMOTO, Hiroshi NAKANO, Akira KOTABE
  • Publication number: 20190369080
    Abstract: A first modulation voltage is applied to a thin film. An amount of a change in the phase of a current carried through the thin film with respect to the phase of the first modulation voltage is compared with a threshold. Upon detecting that the amount of the change in the phase exceeds the threshold is detected, the application of the first modulation voltage is stopped. Thus, a nanopore is formed on the thin film at high speed.
    Type: Application
    Filed: December 9, 2016
    Publication date: December 5, 2019
    Inventors: Yoshimitsu YANAGAWA, Kenichi TAKEDA, Itaru YANAGI, Yusuke GOTO, Kazuma MATSUI
  • Publication number: 20190355714
    Abstract: In a protective circuit of a conventional electronic device, surge resistance is low and it is difficult to connect an external connection terminal of an integrated circuit directly to an external connection terminal of the electronic device or the like.
    Type: Application
    Filed: December 20, 2017
    Publication date: November 21, 2019
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Masahiro MATSUMOTO, Hiroshi NAKANO, Yoshimitsu YANAGAWA, Akira KOTABE
  • Patent number: 10481125
    Abstract: To a biomolecule measuring apparatus, a semiconductor sensor for detecting ions generated by a reaction between a biomolecular sample and a reagent is set. The semiconductor sensor has a plurality of cells which are arranged on a semiconductor substrate, and each of which detects ions, and a plurality of readout wires. Each of the plurality of cells has an ISFET which has a floating gate and which detects ions, a first MOSFET M2 for amplifying an output from the ISFET, and a second MOSFET M3 which selectively transmits an output from the first MOSFET to a corresponding readout wire R1. Each of the plurality of cells is provided with a third MOSFET M1 which generates hot electrons in the ISFET and which injects a charge to the floating gate of the ISFET. Here, the second MOSFET and the third MOSFET are separately controlled.
    Type: Grant
    Filed: October 2, 2014
    Date of Patent: November 19, 2019
    Assignee: HITACHI HIGH-TECHNOLOGIES CORPORATION
    Inventors: Takayuki Kawahara, Yoshimitsu Yanagawa, Naoshi Itabashi, Riichiro Takemura
  • Patent number: 10451584
    Abstract: Provided is a biomolecule measuring device capable of effectively reducing measurement noise occurring when measuring a biomolecule sample using a semiconductor sensor. This biomolecule measuring device generates a trigger to react a sample with a reagent after starting to send the reagent onto the semiconductor sensor that detects ion concentration (see FIG. 7).
    Type: Grant
    Filed: November 18, 2013
    Date of Patent: October 22, 2019
    Assignee: Hitachi High-Technologies Corporation
    Inventors: Yoshimitsu Yanagawa, Takahide Yokoi, Naoshi Itabashi, Takayuki Kawahara, Sonoko Migitaka, Makiko Yoshida, Takamichi Muramatsu
  • Patent number: 10444031
    Abstract: Provided is a sensor device wherein malfunction due to a negative surge is suppressed. This sensor device is provided with: a sensor element wherein electrical characteristics change corresponding to physical quantities; a signal processing circuit that processes output signals of the sensor element; a first transistor element that supplies currents to the sensor element and the signal processing circuit; a control circuit that controls a base current of the first transistor element; a power supply terminal; and a ground terminal. The sensor device is characterized in that the control circuit is provided with a limiting section that limits a current flowing from the ground terminal toward a base terminal of the first transistor element.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: October 15, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Yoshimitsu Yanagawa, Masahiro Matsumoto, Satoshi Asano, Hiroshi Nakano, Akira Kotabe
  • Patent number: 10310525
    Abstract: Provided is an electronic device which can easily measure a standby current of an internal circuit of an electronic device after burn-in. The electronic device includes: a power source terminal; a regulator that generates a predetermined voltage from a voltage of the power source terminal; an internal circuit that is operated by an output voltage of the regulator; and a standby terminal through which the regulator and the internal circuit are set to a low power consumption state.
    Type: Grant
    Filed: November 27, 2015
    Date of Patent: June 4, 2019
    Assignee: Hitachi Automotive Systems, Ltd.
    Inventors: Masahiro Matsumoto, Hiroshi Nakano, Yoshimitsu Yanagawa, Akira Kotabe
  • Publication number: 20190166358
    Abstract: An aspect of the present invention provides a display device that does not hinder driving. An electronic mirror includes: an image display device capable of switching between 2D display and 3D display, the 3D display being carried out by a parallax barrier method; and a distance measuring device for measuring a distance from eyes of a user to a display screen of the image display device. The electronic mirror switches display from the 3D display to the 2D display in a case where the distance measured by the distance measuring device falls outside a predetermined range during the 3D display.
    Type: Application
    Filed: November 28, 2018
    Publication date: May 30, 2019
    Inventors: Takehiko NAKAGAWA, Yoshimitsu INAMORI, Eri YANAGAWA, Takehiro MURAO, Ryoh KIKUCHI, Takayuki YAMADA
  • Publication number: 20190166357
    Abstract: An aspect of the present invention provides a display device that does riot hinder driving. An electronic mirror in accordance with an embodiment of the present invention includes: a depth adjusting section for adjusting a depth of a visible object contained in an image, in a case where 2D display is switched to 3D display or in a case where 3D display is switched to 2D display; and an output image generating section for generating an image which reaches, in a predetermined time period, the depth having been adjusted by the depth adjusting section.
    Type: Application
    Filed: November 28, 2018
    Publication date: May 30, 2019
    Inventors: Takehiko Nakagawa, Yoshimitsu Inamori, Eri Yanagawa, Takehiro Murao, Ryoh Kikuchi, Takayuki Yamada
  • Publication number: 20190137431
    Abstract: An object of the present invention is to provide a biomolecule measuring device that can decrease the influence of crosstalk between chambers. A biomolecule measuring device according to the present invention supplies, to electrodes equipped on chambers, voltages modulated differently to each other.
    Type: Application
    Filed: April 11, 2017
    Publication date: May 9, 2019
    Inventors: Yoshimitsu YANAGAWA, Yusuke GOTO, Michiru FUJIOKA
  • Publication number: 20180354435
    Abstract: In a sensor device 1 according to the present invention, power is supplied from a control device 10 to a power supply terminal 7 and a ground terminal 9 of the sensor device 1 via a power supply line Vcc and a ground line Gnd, respectively, and a sensor output voltage is sent from a sensor output terminal 8 to the control device 10 via a sensor output line Vout. The control device 10 has disposed therein a constant voltage source 11 that supplies a constant voltage to the sensor device 1, and a pull-up resistor 12 connected between the sensor output line Vout and the constant voltage source 11.
    Type: Application
    Filed: July 27, 2016
    Publication date: December 13, 2018
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Masahiro MATSUMOTO, Hiroshi NAKANO, Yoshimitsu YANAGAWA
  • Publication number: 20180304829
    Abstract: Even when a positive/negative surge is applied to a power-supply line, occurrence of malfunction in a semiconductor device is lessened. In an in-vehicle semiconductor device, regulators convert an externally-supplied voltage to generate voltages. A voltage monitoring unit includes a voltage monitoring circuit and a switch, and monitors first to third voltages. An internal circuit has a processor operated by the voltage, and an oscillator operated by the voltage and generating a clock signal to be provided the processor. The voltage monitoring unit stops providing the clock signal to the processor when the voltage level of at least any one of the first to third voltages is below a set value. The voltage monitoring unit provides the clock signal to the processor when the voltage levels of all the first to third voltages exceed the set value.
    Type: Application
    Filed: September 13, 2016
    Publication date: October 25, 2018
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Yoshimitsu YANAGAWA, Masahiro MATSUMOTO, Hiroshi NAKANO, Akira KOTABE
  • Publication number: 20180299309
    Abstract: In using a fast Fourier transform for correction of a pulsation error in a conventional air flow rate measuring device, the correction is delayed due to the observation time and computation time required for the fast Fourier transform, leading to difficulty in following changes in the pulsation state at high speed. The air flow rate measuring device according to the present invention comprises an air flow rate detector that generates an output signal in accordance with an air flow rate being measured, an amplitude detector that detects a pulsation amplitude from the output signal, a low-pass filter in which the cut-off frequency changes in accordance with the value of the pulsation amplitude, and a waveform arithmetic unit that computes the waveforms of the output signal from the low-pass filter and the output signal. The waveform arithmetic unit is constituted from multipliers, an adder, and a condition determination process.
    Type: Application
    Filed: October 17, 2016
    Publication date: October 18, 2018
    Inventors: Masahiro MATSUMOTO, Hiroshi NAKANO, Yoshimitsu YANAGAWA, Akira KOTABE
  • Patent number: 10096590
    Abstract: In conventional sensor devices, it has been difficult to achieve both EMC resistance and ESD resistance, which are required at the output terminals of an automobile sensor device. A sensor device 1 of the present embodiment comprises: a power supply terminal 2 that supplies power; a ground terminal 3; a sensor element 4, the electrical characteristics of which change in accordance with a physical quantity; a signal processing integrated circuit 5 that processes an output signal output from the sensor element 4; and an output terminal that outputs the output signal processed by the signal processing integrated circuit 5.
    Type: Grant
    Filed: September 16, 2014
    Date of Patent: October 9, 2018
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Masahiro Matsumoto, Hiroshi Nakano, Yoshimitsu Yanagawa, Akira Kotabe
  • Patent number: 10030266
    Abstract: In the field of the next generation DNA sequencer, a method for integrating very high sensitive FET sensors having side gates and nanopores as devices used for identifying four kinds of base and for mapping the base sequence of DNA without using reagents, and a semiconductor device having selection transistors and amplifier transistors respectively corresponding to the FET sensors having side gates and nanopores respectively so as to be able to read the variation of a detection current based on the differences among the charges of the four kinds of base without deteriorating the detection sensitivity of the FET sensor, are presented.
    Type: Grant
    Filed: June 27, 2013
    Date of Patent: July 24, 2018
    Assignee: HITACHI, LTD.
    Inventors: Itaru Yanagi, Riichiro Takemura, Yoshimitsu Yanagawa, Takahide Yokoi, Takashi Anazawa
  • Publication number: 20180188088
    Abstract: To provide a gas sensor device having improved measurement accuracy. This gas sensor device is provided with: a sensor element that detects the concentration of a gas by means of heat dissipation from a heat generating body; and a cover with which the sensor element is covered. The cover has a plurality of ventilation sections, which are disposed by being separated with each other in the direction perpendicular to the flowing direction of the gas, and the sensor element is disposed between the ventilation sections.
    Type: Application
    Filed: July 27, 2016
    Publication date: July 5, 2018
    Inventors: Hiroshi NAKANO, Masahiro MATSUMOTO, Yasuo ONOSE, Yoshimitsu YANAGAWA
  • Publication number: 20180144984
    Abstract: A semiconductor chip having a pad, a protective element, and an internal circuit for providing a semiconductor chip having a protective circuit with high noise resistance, wherein the semiconductor chip is characterized in that the resistance value of metal wiring on a path reaching the pad and the protective element is higher than the resistance value of the protective element.
    Type: Application
    Filed: March 25, 2016
    Publication date: May 24, 2018
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Yoshimitsu YANAGAWA, Masahiro MATSUMOTO, Hiroshi NAKANO, Akira KOTABE, Satoshi ASANO