Patents by Inventor Akifumi MARU

Akifumi MARU 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).

  • Single event upset-tolerant latch circuit and flip-flop circuit
    Patent number: 11115008
    Abstract: Provided are a latch circuit and a flip-flop circuit each having more excellent tolerance to single event upset (SEU). The single event upset (SEU)-tolerant latch circuit of the present invention is configured such that three transistors for redundancy are added to each of eight transistors constituting a conventional DICE latch circuit, at respective positions consisting of a serial position, a parallel position and a parallel-serial position so as to form a four-transistor circuit in which a serially duplicated circuit is duplicated in parallel, and each of a first data input part and a second data input part is also made dually redundant.
    Type: Grant
    Filed: May 16, 2018
    Date of Patent: September 7, 2021
    Assignees: Japan Aerospace Exploration Agency, High-Reliability Engineering & Components Corporation
    Inventors: Akifumi Maru, Satoshi Kuboyama, Tsukasa Ebihara, Akiko Makihara
  • SINGLE EVENT UPSET-TOLERANT LATCH CIRCUIT AND FLIP-FLOP CIRCUIT
    Publication number: 20210194470
    Abstract: Provided are a latch circuit and a flip-flop circuit each having more excellent tolerance to single event upset (SEU). The single event upset (SEU)-tolerant latch circuit of the present invention is configured such that three transistors for redundancy are added to each of eight transistors constituting a conventional DICE latch circuit, at respective positions consisting of a serial position, a parallel position and a parallel-serial position so as to form a four-transistor circuit in which a serially duplicated circuit is duplicated in parallel, and each of a first data input part and a second data input part is also made dually redundant.
    Type: Application
    Filed: May 16, 2018
    Publication date: June 24, 2021
    Inventors: Akifumi MARU, Satoshi KUBOYAMA, Tsukasa EBIHARA, Akiko MAKIHARA