Patents by Inventor Kuniaki Kawahara

Kuniaki Kawahara 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).

  • Patent number: 11837436
    Abstract: In one embodiment, a waveform generating device includes a first DA converter converting input data, a controller outputting a first signal having a command value based on the input data, and a second signal having a command value differing by a constant value from the first signal, a second DA converter converting the first signal, a third DA converter converting the second signal, and a combiner combining the output of the first DA converter, the output of the second DA converter, and the output of the third DA converter. When a value of a predetermined first high-order bit of the input data is inverted, the controller changes the command value of the first signal such that a value of the first high-order bit or a second high-order bit different from the first high-order bit is inverted.
    Type: Grant
    Filed: December 27, 2021
    Date of Patent: December 5, 2023
    Assignee: NuFlare Technology, Inc.
    Inventors: Michihiko Ikeda, Akinori Mine, Kuniaki Kawahara
  • Publication number: 20220246396
    Abstract: In one embodiment, a waveform generating device includes a first DA converter converting input data, a controller outputting a first signal having a command value based on the input data, and a second signal having a command value differing by a constant value from the first signal, a second DA converter converting the first signal, a third DA converter converting the second signal, and a combiner combining the output of the first DA converter, the output of the second DA converter, and the output of the third DA converter. When a value of a predetermined first high-order bit of the input data is inverted, the controller changes the command value of the first signal such that a value of the first high-order bit or a second high-order bit different from the first high-order bit is inverted.
    Type: Application
    Filed: December 27, 2021
    Publication date: August 4, 2022
    Applicant: NuFlare Technology, Inc.
    Inventors: Michihiko Ikeda, Akinori Mine, Kuniaki Kawahara
  • Patent number: 7091805
    Abstract: An electromagnetic relay has a mobile contact point attached to a contact member, a fixed contact point, a contact point spring that applies a biasing force on the contact member towards the fixed contact point, a guide that carries the contact member and said contact point spring, a coil that generates a pulling force when excited to move the guide and a returning spring that provides a biasing force for causing the guide to return. A mechanism is provided such that a load is generated on the contact member by the motion of the guide towards the fixed function against the returning spring immediately before the mobile contact point contacts the fixed contact point. This mechanism applies a contact point spring load of the contact point spring and the load as a contact pressure to the contact member for contacting the mobile contact point with the fixed contact point.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: August 15, 2006
    Assignee: OMRON Corporation
    Inventors: Kuniaki Kawahara, Shinya Matsuo
  • Publication number: 20050200439
    Abstract: An electromagnetic relay has a mobile contact point attached to a contact member, a fixed contact point, a contact point spring that applies a biasing force on the contact member towards the fixed contact point, a guide that carries the contact member and said contact point spring, a coil that generates a pulling force when excited to move the guide and a returning spring that provides a biasing force for causing the guide to return. A mechanism is provided such that a load is generated on the contact member by the motion of the guide towards the fixed function against the returning spring immediately before the mobile contact point contacts the fixed contact point. This mechanism applies a contact point spring load of the contact point spring and the load as a contact pressure to the contact member for contacting the mobile contact point with the fixed contact point.
    Type: Application
    Filed: February 9, 2005
    Publication date: September 15, 2005
    Inventors: Kuniaki Kawahara, Shinya Matsuo
  • Patent number: 6606697
    Abstract: A page table on a main storage contains a correspondence between guest virtual address and a host real address, and a TLB in a processor holds said correspondence calculated by a previous address translation. A PTBR holds a real address of a page table. When a processor detects a TLB purge, the processor starts a host when detecting a TLB purge. The host examines a virtual space change processing executed by the guest, and stores a correspondence between a new guest virtual address and a new host real address in the page table.
    Type: Grant
    Filed: August 11, 2000
    Date of Patent: August 12, 2003
    Assignee: Hitachi, Ltd.
    Inventors: Kuniaki Kawahara, Yukihiro Seki, Takashi Shimojo