Patents by Inventor Takashi Umamichi

Takashi Umamichi 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).

  • Resolver converter and motor control device
    Patent number: 11881806
    Abstract: A resolver converter includes a tracking loop circuit that calculates an angle ? from a resolver output signal, a control and diagnosis circuit that controls the tracking loop circuit and diagnoses based on the resolver output signal, wherein the control and diagnosis circuit, by operating the tracking loop circuit as a direct digital synthesizer (DDS), synchronously detects a noise signal superimposed on the resolver output signal.
    Type: Grant
    Filed: March 22, 2021
    Date of Patent: January 23, 2024
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Takashi Umamichi
  • RESOLVER CONVERTER AND MOTOR CONTROL DEVICE
    Publication number: 20220302858
    Abstract: A resolver converter includes a tracking loop circuit that calculates an angle ? from a resolver output signal, a control and diagnosis circuit that controls the tracking loop circuit and diagnoses based on the resolver output signal, wherein the control and diagnosis circuit, by operating the tracking loop circuit as a direct digital synthesizer (DDS), synchronously detects a noise signal superimposed on the resolver output signal.
    Type: Application
    Filed: March 22, 2021
    Publication date: September 22, 2022
    Inventor: Takashi UMAMICHI
  • Semiconductor device with decoupling capacitance controlled and control method for the same
    Patent number: 7733164
    Abstract: In a semiconductor device, a monitoring circuit monitors and detects a quantity of noise in the semiconductor device. A control circuit has capacitances and controls connections to the capacitances such a decoupling capacitance value provided between a first power supply and a second power supply is dynamically adjusted based on the detected noise quantity.
    Type: Grant
    Filed: August 30, 2007
    Date of Patent: June 8, 2010
    Assignee: NEC Electronics Corporation
    Inventors: Takashi Umamichi, Katsunori Shirai
  • SEMICONDUCTOR DEVICE WITH DECOUPLING CAPACITANCE CONTROLLED AND CONTROL METHOD FOR THE SAME
    Publication number: 20080055018
    Abstract: In a semiconductor device, a monitoring circuit monitors and detects a quantity of noise in the semiconductor device. A control circuit has capacitances and controls connections to the capacitances such a decoupling capacitance value provided between a first power supply and a second power supply is dynamically adjusted based on the detected noise quantity.
    Type: Application
    Filed: August 30, 2007
    Publication date: March 6, 2008
    Applicant: NEC Electronics Corporation
    Inventors: Takashi UMAMICHI, Katsunori Shirai