Patents by Inventor Kyoji Higasa

Kyoji Higasa 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).

  • Backup memory control unit with reduced current consumption having normal self-refresh and unsettled modes of operation
    Patent number: 7085946
    Abstract: A backup memory control unit can reduce the current consumption when a memory (SDRAM) is inactive by providing the memory with an unsettled mode in which no power is supplied to the memory. It provides the memory with the unsettled mode, and halts the power supply from a backup power supply to the SDRAM in the unsettled mode in which the SDRAM is not in operation, thereby limiting an increase in the current consumption. The functions are executed by a hardware circuit without using a backup microcomputer.
    Type: Grant
    Filed: March 25, 2003
    Date of Patent: August 1, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Chikara Yokoyama, Kyoji Higasa, Kazuyoshi Ohtsuka
  • Backup memory control unit with
    Publication number: 20030189862
    Abstract: A backup memory control unit can reduce the current consumption when a memory (SDRAM) is inactive by providing the memory with an unsettled mode in which no power is supplied to the memory. It provides the memory with the unsettled mode, and halts the power supply from a backup power supply to the SDRAM in the unsettled mode in which the SDRAM is not in operation, thereby limiting an increase in the current consumption. The functions are executed by a hardware circuit without using a backup microcomputer.
    Type: Application
    Filed: March 25, 2003
    Publication date: October 9, 2003
    Applicant: MITSUBISHI DENKI KABUSHIKI KAISHA
    Inventors: Chikara Yokoyama, Kyoji Higasa, Kazuyoshi Ohtsuka