Patents by Inventor Hiroi Nambu

Hiroi Nambu 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).

  • Electronic control device with electromagnetic compatibility for vehicle control
    Patent number: 12177992
    Abstract: To provide an electronic control device capable of securing electromagnetic compatibility and mechanical strength. An electronic control device includes a base portion formed in a bottomed cylindrical shape; an electronic control board provided in the base portion; and connectors provided on an opening side of the base portion and electrically connected to the electronic control board, in which the base portion includes a first layer formed of a conductive member and a second layer formed of a member different from that of the first layer.
    Type: Grant
    Filed: August 14, 2020
    Date of Patent: December 24, 2024
    Assignee: Hitachi Astemo, Ltd.
    Inventors: Toshiyuki Fujimasa, Eiji Ichikawa, Masao Horie, Masashi Saito, Hiroi Nambu, Tomokazu Tanase
  • ELECTRONIC CONTROL DEVICE
    Publication number: 20220304169
    Abstract: To provide an electronic control device capable of securing electromagnetic compatibility and mechanical strength. An electronic control device includes a base portion formed in a bottomed cylindrical shape; an electronic control board provided in the base portion; and connectors provided on an opening side of the base portion and electrically connected to the electronic control board, in which the base portion includes a first layer formed of a conductive member and a second layer formed of a member different from that of the first layer.
    Type: Application
    Filed: August 14, 2020
    Publication date: September 22, 2022
    Applicant: Hitachi Astemo, Ltd.
    Inventors: Toshiyuki FUJIMASA, Eiji ICHIKAWA, Masao HORIE, Masashi SAITO, Hiroi NAMBU, Tomokazu TANASE
  • Radio transmitter and envelope tracking power supply control method
    Patent number: 8600321
    Abstract: The envelope tracking power supply includes a plurality of variable voltage supplies. A power supply controller of a power amplifier controls the plurality of variable voltage supplies so as to precisely divide the power supply voltage in a high frequency area, based on the voltage distribution of a received transmitted base band signal, in order to maximize the power added efficiency of the power amplifier. The power supply controller includes a threshold memory including a plurality of first zones, and a frequency memory including a plurality of second zones. The power supply controller changes the threshold held in the first zones so that each second zone approaches the average of the second zones.
    Type: Grant
    Filed: May 22, 2012
    Date of Patent: December 3, 2013
    Assignee: Hitachi, Ltd.
    Inventors: Hiroi Nambu, Masami Ohnishi
  • RADIO TRANSMITTER AND ENVELOPE TRACKING POWER SUPPLY CONTROL METHOD
    Publication number: 20120309333
    Abstract: The envelope tracking power supply includes a plurality of variable voltage supplies. A power supply controller of a power amplifier controls the plurality of variable voltage supplies so as to precisely divide the power supply voltage in a high frequency area, based on the voltage distribution of a received transmitted base band signal, in order to maximize the power added efficiency of the power amplifier. The power supply controller includes a threshold memory including a plurality of first zones, and a frequency memory including a plurality of second zones. The power supply controller changes the threshold held in the first zones so that each second zone approaches the average of the second zones.
    Type: Application
    Filed: May 22, 2012
    Publication date: December 6, 2012
    Applicant: HITACHI, LTD.
    Inventors: Hiroi Nambu, Masami Ohnishi