Patents by Inventor Yasuhiro Kosasayama

Yasuhiro Kosasayama 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).

  • Rotation state detecting device and rotation state detecting method
    Patent number: 7205761
    Abstract: A rotation state detecting device capable of detecting the direction of rotation of a rotating body includes first and second bridge circuits made up of magneto-resistance effect elements, a first comparator for detecting the increasing/decreasing direction of the center point voltage of the first bridge circuit, a second comparator for detecting the increasing/decreasing direction of the center point voltage of the second bridge circuit, a third comparator for detecting the difference between the center point voltage of the first bridge circuit and the center point voltage of the second bridge circuit, and logic value information deriving means for outputting “1” when the logic values of the outputs of the first comparator and the second comparator are both “1”, outputting “0” when they are both “0”, and continuing to output the previous value at other times, the direction of rotation of the rotating body being determined on the basis of a combination of the outputs of the first, second and third comparators
    Type: Grant
    Filed: March 11, 2005
    Date of Patent: April 17, 2007
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Manabu Tsukamoto, Takaaki Murakami, Yuji Ariyoshi, Takahiro Ohnakado, Yasuhiro Kosasayama
  • Rotation state detecting device and rotation state detecting method
    Publication number: 20050206371
    Abstract: A rotation state detecting device capable of detecting the direction of rotation of a rotating body includes first and second bridge circuits made up of magneto-resistance effect elements, a first comparator for detecting the increasing/decreasing direction of the center point voltage of the first bridge circuit, a second comparator for detecting the increasing/decreasing direction of the center point voltage of the second bridge circuit, a third comparator for detecting the difference between the center point voltage of the first bridge circuit and the center point voltage of the second bridge circuit, and logic value information deriving means for outputting “1” when the logic values of the outputs of the first comparator and the second comparator are both “1”, outputting “0” when they are both “0”, and continuing to output the previous value at other times, the direction of rotation of the rotating body being determined on the basis of a combination of the outputs of the first, second and third comparators
    Type: Application
    Filed: March 11, 2005
    Publication date: September 22, 2005
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Manabu Tsukamoto, Takaaki Murakami, Yuji Ariyoshi, Takahiro Ohnakado, Yasuhiro Kosasayama