Patents by Inventor Katsuhisa Toshima

Katsuhisa Toshima 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).

  • Magnetic coupler device and magnetically coupled isolator
    Patent number: 8400748
    Abstract: In a magnetic coupler device comprising: a magnetic field generation circuit generating a magnetic field according to an input current; and a detection bridge circuit including a pair of magnetoresistance effect devices, a resistance value of each of the magnetoresistance effect devices changing by applying a magnetic field generated by said magnetic field generation circuit to each of the magnetoresistance effect devices, and having two outputs between which a voltage difference is generated according to an intensity of the magnetic field generated by said magnetic field generation circuit, by forming a geometric shape of each of said magnetic field generation circuit and said detection bridge circuit in line symmetric or point symmetric, a high S/N ratio is obtained even with high frequency.
    Type: Grant
    Filed: January 31, 2008
    Date of Patent: March 19, 2013
    Assignees: OMRON Corporation, The Research Institute for Electric and Magnetic Materials
    Inventors: Masaaki Yamamoto, Yuichi Kariya, Katsuhisa Toshima, Nobukiyo Kobayashi, Takeshi Yano
  • MAGNETIC COUPLER DEVICE AND MAGNETICALLY COUPLED ISOLATOR
    Publication number: 20100134944
    Abstract: In a magnetic coupler device comprising: a magnetic field generation circuit generating a magnetic field according to an input current; and a detection bridge circuit including a pair of magnetoresistance effect devices, a resistance value of each of the magnetoresistance effect devices changing by applying a magnetic field generated by said magnetic field generation circuit to each of the magnetoresistance effect devices, and having two outputs between which a voltage difference is generated according to an intensity of the magnetic field generated by said magnetic field generation circuit, by forming a geometric shape of each of said magnetic field generation circuit and said detection bridge circuit in line symmetric or point symmetric, a high S/N ratio is obtained even with high frequency.
    Type: Application
    Filed: January 31, 2008
    Publication date: June 3, 2010
    Applicants: OMRON CORPORATION, THE RESEARCH INSTITUTE FOR ELECTRIC AND MAGNETIC MATERIALS
    Inventors: Masaaki Yamamoto, Yuichi Kariya, Katsuhisa Toshima, Nobukiyo Kobayashi, Takeshi Yano