Patents by Inventor Akira Kotabe

Akira Kotabe 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: 20200317144
    Abstract: Provided is a vehicle-mounted system capable of transmitting a command to a first system from a second system during a period in which the first system communicates with the second system according to a unidirectional communication protocol. A vehicle-mounted system 100 includes a sensor 10 (first system) and an ECU (second system). The sensor 10 outputs a message signal including a pause pulse to the communication line DATA according to SENT (a unidirectional communication protocol). The ECU 20 is connected to the communication line DATA, and transmits a command to the sensor 10 using the falling period of the pause pulse.
    Type: Application
    Filed: January 28, 2019
    Publication date: October 8, 2020
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Akira KOTABE, Shinya MATOHARA
  • 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: 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
  • Patent number: 10591332
    Abstract: Provided is an airflow meter with good precision. In the airflow meter, which is provided with an arithmetic circuit that incorporates air temperature and a sensor module temperature as adjustment elements for the output characteristics of the airflow meter, corrects the output characteristics in accordance with the temperature difference between the air temperature and the sensor module temperature and reduces the correction amount when the absolute value of the difference between the air temperature and the sensor module temperature is small.
    Type: Grant
    Filed: July 27, 2016
    Date of Patent: March 17, 2020
    Assignee: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Ryo Sato, Masahiro Matsumoto, Satoshi Asano, Akira Kotabe, Kazunori Suzuki
  • 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: 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
  • Publication number: 20190353509
    Abstract: The present invention provides a thermal flow rate measurement device that is capable of highly accurate correction of the temperature of an intake gas flow rate using a two-dimensional correction map that stores a correction value in association with temperature and intake gas flow rate.
    Type: Application
    Filed: November 8, 2017
    Publication date: November 21, 2019
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Kazunori SUZUKI, Keiji HANZAWA, Junichi HORIE, Akira KOTABE
  • 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: 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
  • Publication number: 20180252565
    Abstract: Provided is an airflow meter with good precision. In the airflow meter, which is provided with an arithmetic circuit that incorporates air temperature and a sensor module temperature as adjustment elements for the output characteristics of the airflow meter, corrects the output characteristics in accordance with the temperature difference between the air temperature and the sensor module temperature and reduces the correction amount when the absolute value of the difference between the air temperature and the sensor module temperature is small.
    Type: Application
    Filed: July 27, 2016
    Publication date: September 6, 2018
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Ryo SATO, Masahiro MATSUMOTO, Satoshi ASANO, Akira KOTABE, Kazunori SUZUKI
  • 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
  • Publication number: 20170344040
    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: Application
    Filed: November 27, 2015
    Publication date: November 30, 2017
    Applicant: Hitachi Automotive Systems, Ltd.
    Inventors: Masahiro MATSUMOTO, Hiroshi NAKANO, Yoshimitsu YANAGAWA, Akira KOTABE
  • Publication number: 20170278838
    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: Application
    Filed: September 16, 2014
    Publication date: September 28, 2017
    Applicant: HITACHI AUTOMOTIVE SYSTEMS, LTD.
    Inventors: Masahiro MATSUMOTO, Hiroshi NAKANO, Yoshimitsu YANAGAWA, Akira KOTABE
  • Publication number: 20170227378
    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: Application
    Filed: September 16, 2014
    Publication date: August 10, 2017
    Inventors: Yoshimitsu YANAGAWA, Masahiro MATSUMOTO, Satoshi ASANO, Hiroshi NAKANO, Akira KOTABE
  • Patent number: 9725753
    Abstract: Provided is a device that, on the basis of a measurement result of a current that has a low value and a wide distribution, identifies the composition of biological molecules passing through a nanoparticle path. This biomolecule information analysis device obtains a current value by applying an electrical field to biomolecules passing through a gap between a first electrode and a second electrode, and identifies the structure of the biomolecules by integrating the current value and making a comparison with a reference value (see FIG. 1).
    Type: Grant
    Filed: May 31, 2011
    Date of Patent: August 8, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Kazuo Ono, Tatsuo Nakagawa, Yoshimitsu Yanagawa, Takayuki Kawahara, Akira Kotabe, Riichiro Takemura
  • Patent number: 9572491
    Abstract: A vital signal measurement system including a plurality of terminals aims to facilitate synchronization of each terminal with respect to other terminals. Each of the plurality of terminals (102) is provided with a first vital signal sensor (201) for measuring a vital signal, a first memory (205) for storing a first data which is based on the vital signal, and a first radio communication unit (206) for communicating with other terminals by radio. The first data is applied with a sequence number corresponding to the first data and the number indicates an order in which the first data is acquired. A first terminal (102b) included in the plurality of terminals performs resetting of the sequence number triggered by the synchronous signal which is received by the first radio communication unit.
    Type: Grant
    Filed: September 3, 2012
    Date of Patent: February 21, 2017
    Assignee: Hitachi, Ltd.
    Inventors: Tatsuo Nakagawa, Tomoyuki Ishii, Akira Kotabe
  • Patent number: 9361978
    Abstract: The invention is provided to suppress a current supplied to a storage element so as not to vary for each layer in a semiconductor memory device obtained by connecting a plurality of memory cells in series. A semiconductor memory device according to the invention includes a plurality of memory cells connected in series between a first signal line and a second signal line, and supplies a different gate voltage to at least two of selection transistors included in the memory cells, respectively (refer to FIG. 2).
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: June 7, 2016
    Assignee: Hitachi, Ltd.
    Inventors: Nobuhiro Shiramizu, Satoru Hanzawa, Akira Kotabe